A&P IA Test Study Questions | Complete Solutions (Verified Answers)

A&P IA Test Study Questions | Complete Solutions (Verified Answers) An alteration made in accordance with an aircraft specification would be? A- a minor alteration. B- a major alteration. C- accomplished with acceptable data. An alteration was done that normally would be considered a major alteration. How could this be signed off as a minor alteration? A- If you, as the inspecting IA, determine that the repair will not appreciably change the aircraft's flight characteristics. B- If the alteration is listed in the appropriate aircraft specification. C- If the alteration is done in accordance with a Supplemental Type Certificate. As the holder of an inspection authorization, you are performing an annual inspection on a fabric-covered airplane. During the review of the aircraft records you notice that the cover was recently replaced with a synthetic cover. The aircraft documents indicate only grade-A-cotton material was certificated for the aircraft. The change in covering material would constitute a? A- minor repair. B- major repair. C- major alteration. What would NOT be considered maintenance? A- Inspection. B- Preservation. C- Preventive maintenance. What is meant by the abbreviation TCAS? A- Total Corrected Air Speed. B- Terrain Clearance Activation System. C- Traffic Alert and Collision Avoidance System. What is meant by the abbreviation V2? A- Stalling speed. B- Takeoff safety speed. C- Speed for best rate of climb. What is meant when the FAA uses the word "shall" in a regulation? A- It is "advisable" to accomplish the action. B- It is "permissible" to accomplish the action. C- It is required that you accomplish the action. A mechanic replaces the engine on a Cessna 182 with another engine, which is listed on the aircraft TCDS. The mechanic should complete which of the following? A- A logbook entry as this only a minor alteration. B- A 337 form, and get IA approval for this major alteration. C- A 337 form, and get local FSDO "field approval." The term "consensus standard" A- means everybody agrees with the FAA's interpretation. B- is not an FAA-recognized term. C- is an industry-developed standard that applies to LSA certification. "Certification Procedures for Products, Articles and Parts" are found in which Part of Title 14 of the CFR? A- Part 23 B- Part 21 C- Part 121 Aircraft certificated after what date were required to have an approved flight manual? A- July 18, 1978. B- November 1, 1981. C- March 1, 1979. If a person alters an aircraft by installing special wing tips, he or she may get approval to duplicate this alteration on other aircraft by the issuance of a? A- Provisional Type Certificate. B- Supplemental Type Certificate. C- Production Certificate. An aircraft with a standard airworthiness certificate could be in which of the following categories? A- Utility, acrobatic, and commuter. B- Primary, restricted, and experimental. C- Normal, provisional and Transport. An aircraft with a SPECIAL airworthiness certificate would be in which of the following categories? A- Utility, acrobatic, and commuter. B- Primary, restricted, and experimental. C- Normal, provisional, and transport. Which section of 14 CFR provides for the fabrication of aircraft replacement and modification parts (PMA)? A- 14 CFR $21.303. B- 14 CFR, section 23, Appendix B. C- 14 CFR, section 45.21. Before a new type of oil filter for a type certificated aircraft engine, manufactured by a person other than the original engine manufacturer, can be sold for installation on that engine, the manufacturer of the filter must be issued a? A- Parts Manufacturer Approval. B- Supplemental Type Certificate. C- Production Certificate. An export certificate of airworthiness may be issued for? A- a new or used aircraft if it meets the requirements of 14 CFR Part 21, Subpart E. B- an engine, propeller or article, only if it meets the definition of being airworthy. C- an engine or propeller that is not airworthy, if the importing country accepts the deviation from approved design or condition for safe operation on a form acceptable to the FAA. An altimeter that has been approved for installation on a civil aircraft may be manufactured under a? A- Supplemental Type Certificate B- Technical Standard Order. C- Production Certificate. Which regulation prescribes airworthiness standards for airplanes in the normal category, having a passenger seating configuration of 19 or less and a maximum certified takeoff weight of 19,000 pounds or less? A- 14 CFR Part 21. B- 14 CFR Part 23. C- 14 CFR Part 25. When defining the weight limits and center of gravity for an airplane certificated under Part 23, A- the applicant must determine those limits that provide for safe operation of the airplane. B- the condition of the airplane at the time of determining the empty weight and center of gravity as defined by the FAA. C- the FAA specifies only the critical combinations of weight and center of gravity. When weighing an aircraft certified under 14 CFR Part 23, A- the aircraft must be drained of all fluids. B- the applicant must determine a well-defined and easily repeatable condition of the airplane. C- the FAA determines the limits for empty weight and center of gravity. The trim system for a Level 4 airplane must A- maintain lateral and directional control during cruise. B- maintain longitudinal control during cruise. C- maintain lateral and directional control during normal operations. The structure of an airplane certificated under 14 CFR Part 23 must have a factor of safety of A- 2.3 B- 1.5 C- 4.0 Regarding materials and processes in a Part 23 airplane. A- the FAA determines all material design characteristics. B- the applicant must determine the suitability and durability of the materials used. C- the airplane must be capable of continued safe flight following a sudden release of cabin pressure. The fuel system of a Part 23 airplane must A- provide the fuel necessary to each powerplant and the APU functions properly in all likely operating conditions. B- provide fuel for at least one hour of operation at maximum continous power or thrust. C- be designed and arranged to provide for ignition of the fuel. Regarding the distribution of electrical power in a Part 23 airplane, A- there must be enough capacity so that if the primary electrical source fails, the system will be capable of supplying power for essential loads. B- the function at the airplane level is not adversely affected during the time it is exposed to lighting. C- the function at the airplane level is not adversely affected during the time it is exposed to the HIRF environment. Regarding the installation of flight and navigation systems in a part 23 airplane, the information must A- not include any limitations. B- be presented in a manner that the crewmember can monitor the parameters and determine trends. C- inhibit the primary display of flight parameters. Regarding instrument markings and placards in a Part 23 airplane, A- the FAA will define the required placards and markings as necessary. B- the applicant must include instrument marking and placard information in the Airplane Maintenance Manual. C- each airplane must display in a conspicuous manner any placard or instrument marking necessary for operation. If the airplane has a flight data recorder installed, it must be A- visible to crew at all segments of the flight. B- installed so there is an aural or visual means for preflight checking of the recorder for proper recording of data in the storage medium. C- painted either red or black. Regarding the airplane fuel storage system, it must A- provide fuel for at least one hour of operation at maximum continuous power or thrust. B- provide the flight crew with a means to determine the total unusable fuel available. C- be designed to prevent improper filling or recharging. If the maintenance manual contains required maintenance, it will be listed in the Airworthiness Limitations Section. This section must include A- items having time change intervals. B- airframe specified inspection intervals and related procedures. C- both A and B. Aircraft certified under 14 CFR Part 23 must have "Airworthiness Limitations" documentation, including: A- Special inspection techniques. B- Structural inspection intervals. C- Special tool catalog. Aircraft certified under 14 CFR Part 23 must have "Airworthiness Limitations" documentation, including: A- service information. B- Structural inspection intervals. C- Maintenance Manual. Within 14 CFR Part 23, certain required documents are outlined. Which of the following is correct? A- The "Instruction for Continued Airworthiness" and "Airworthiness Limitation Section" are contained in the Manufacturer's Maintenance Manual. B- The "Airworthiness Limitation Section" contains the "Instruction for Continued Airworthiness" and the "Manufacturer's Maintenance Manual." C- The "Airworthiness Limitation Section" and the "Manufacturer's Maintenance Manual" are contained in the "Instruction for Continued Airworthiness." In addition to other requirements set forth in the maintenance manual of a 14 CFR part 23 airplane, commuter category additionally specifies which of the following maintenance instructions? A- Towing instructions. B- Servicing points. C- Special repair methods. When you are performing an annual inspection on an aircraft that has instructions for continued airworthiness, which of the following would be considered approved data? A- Structural repair. B- Maintenance manual. C- Airworthiness limitations section. Part 27 of 14 CFR prescribes airworthiness standards for which of the following? A- Normal category rotorcraft B- Transport category rotorcraft C- Both A and B 14 CFR Part 27 prescribes airworthiness standards for which of the following? A- Small rotorcraft. B- Large rotorcraft. C- Both A and B. What are the designed limit maneuvering load factors required for a helicopter certificated under 14 CFR Part 27? A- +4.0 to -1.6. B- +3.8 to -1.5. C- +3.5 to -1.0. The materials used in the seats of a helicopter must be rated at least A- flame resistant. B- fireproof. C- fire resistant. The reciprocating engine for a helicopter must be approved under 14 CFR Part A- 27. B- 33. C- 29. What is the maximum deviation error allowed in a magnetic direction indicator installed in a helicopter? A- 5 degrees. B- 10 degrees. C- 15 degrees. Certain systems of rotorcraft are specified by 14 CFR Part 43 to be inspected in accordance with the maintenance manual or instructions for Continued Airworthiness as provided by the manufacturer concerned. Of the following, which is such a system? A- Engine. B- Flight controls. C- Drive shaft. Where are the requirements found for the preparation of instructions for Continued Airworthiness for a rotorcraft? A- In Appendix A of Part 27. B- In Appendix B of Part 21. C- In Appendix B of Part 91. As an IA, you are performing an annual inspection on a rotorcraft in accordance with 14 CFR Part 43, Appendix D. Would a maintenance manual, or a section thereof, also be required to perform the inspection? A- They are required when part of an approved inspection program. B- They are required if made mandatory by the type certificate data sheet. C- Maintenance manuals are optional if an equivalent procedure is used. Each person performing an annual inspection must use a checklist while performing the inspection. The checklist must include the scope and detail of the items in 14 CFR Part 43, Appendix D. In addition to the items in the appendix, additional specific items are required by 14 CFR Part 43 if the aircraft is a A- balloon. B- multiengine airplane C- rotorcraft. Following an annual inspection, if the aircraft is found unairworthy, regulations require a list of discrepancies and unairworthy items be given to whom? A- The owner or operator. B- The owner or operator and the Flight Standards District Office (FSDO) . C- The owner or operator, the FSDO, and a copy for your file. Which Canadian maintenance entity may perform an annual inspection on a U.S. -registered aircraft? A- Aviation maintenance engineer. B- Approved maintenance organization. C- Neither A nor B. Which Canadian maintenance entity may approve major repairs and major alterations on U.S.-registered aircraft? A- Aviation maintenance engineer. B- Approved maintenance organization. C- Neither A nor B. Which Canadian maintenance entity may approve data for major repairs to U.S. -registered aircraft? A- Aviation maintenance engineer. B- Approved maintenance organization. C- Neither A nor B. The overhaul of a system or component of an aircraft on a progressive inspection program is considered to be what type of inspection? A- Detailed. B- Routine. C- Component segment. In accordance with 14 CFR Part 43, a component part that has been disassembled, cleaned, inspected, repaired as necessary, reassembled, and tested to the same tolerances and limits as a new item is classified as A- refurbished. B- remanufactured. C- rebuilt. In accordance with 14 CFR Part 43, an aircraft engine that has been disassembled, cleaned, inspected, repaired as necessary and reassembled, then tested in accordance with approved standards and technical data is classified as A- overhauled. B- remanufactured. C- rebuilt. What Part of the Federal Aviation Regulations contains the standards of performance under which the holder of an inspection authorization performs his/her activities? A- 14 CFR Part 43. B- 14 CFR Part 61. C- 14 CFR Part 91. When performing an annual inspection of a helicopter main rotor transmission gearbox, the inspection will be accomplished in accordance with what data? A- 14 CFR Part 43, Appendix B. B- Maintenance manual or instructions for continued airworthiness. C- Manufacturer's service bulletins. As specified by 14 CFR Part 43, which of the following inspections is NOT part of a progressive inspection program? A- Initial. B- Routine. C- Segment. During the annual inspection, you note a minor repair was made to an airframe component by a repair station. The repair was recorded on a work order containing reference to acceptable data and the date of completion. What other information must be on the work order? A- Signature and certificate number of person approving the repair. B- A maintenance release signed by an authorized representative of the repair station. C- A yellow tag signed by an authorized representative of the repair station. What Part of Title 14 of the CFR referred to in $65.95(a)(1) contains the standards of performance under which a holder of an inspection authorization performs his or her activity? A- Part 43. B- Part 73. C- Part 135. Within Title 14 of the Code of Federal Regulations, the term "remanufactured" A- means an engine has been overhauled to serviceable limits. B- means an engine has been overhauled to standards that allow zero time to be established. C- has no specific meaning. Certain maintenance records are required to be retained until the work is repeated, superseded by other work or for 1 year. An exception to this rule occurs with maintenance records concerning what maintenance? A- Engine remanufacture records. B- 100-hour inspection. C- Altimeter test and inspection. 14 CFR Part 43 requires person performing maintenance to make entries in the Maintenance records. If the logbook entry is made per the requirements of $91.417, does this entry also meet the requirements of 14 CFR Part 43? A- No, it would not be sufficient. B- Yes, if it is for an inspection only. C- Yes, it would be sufficient for maintenance and inspections. 14 CFR Part 43 requires persons performing maintenance to make entries in the Maintenance records. If the logbook entry is made per the requirements of 14 CFR Part 43, does this entry also meet the requirements of 14 CFR $91.417? A- No, it would not be sufficient. B- Yes, if it is for an inspection only. C- Yes, it would be sufficient for maintenance and inspections. During the review of an aircraft's records while performing an annual inspection, you discover that the altimeter has not been inspected and tested within the preceding 24 calendar months. If the aircraft meets all other airworthiness requirements, as the inspection authorization, you should A- list the altimeter as a deficiency and report the aircraft as unairworthy. B- approve the aircraft for return to service after placarding the instrument "for day VFR usage only." C- approve the aircraft for return to service and advise the owner or operator that the aircraft should not be used under instrument flight rules. According to Title 14 of the CFR, an engine may be granted zero time by the manufacturer, if it has been A- newly overhauled. B- rebuilt. C- remanufactured. You are performing an annual inspection on a small twin-engine airplane. The engine has been "zero-timed" by the manufacturer. What would you expect to find in the maintenance records? A- A new engine logbook. B- An appropriate entry by the manufacturer. C- Both A and B. You are performing an annual inspection on a small twin-engine airplane. The engine has been "zero-timed" by the manufacturer. What would you expect to find in the maintenance records? A- A new engine logbook. B- A form 337, work order, and a new engine logbook. C- An 8130-3 approval tag, maintenance release and a new engine logbook. You are performing an annual inspection on an aircraft where the engine has been "zero-timed" by the manufacturer. What does this indicate? A- That the parts have been inspected and found to meet the manufacturer's new specifications (minimum and maximum dimensions). B- That the parts used are new parts. C- That the parts used meet the serviceable limits as listed in the manufacturer's overhaul manual. When a normally-aspirated engine having spur-type reduction gearing is overhauled, an FAA Form 337 is A- completed and retained until the engine is again overhauled or removed from the airframe and replaced with a different engine. B- not required to be completed. C- completed and retained until the work is repeated or superseded by other work or for 1 year after the work is performed. Airframe alterations of the type found in 14 CFR Part 43, Appendix A, are major alterations except when listed in A- aircraft specifications issued by FAA. B- supplemental type certificates. C- manufacturers' maintenance manuals. A duplicate copy of FAA Form 337 shall be forwarded to the local FAA Aircraft Registration Branch within how many hours after the work is inspected? A- 24. B- 48. C- 72. During the inspection of a complete electrical system installation, you determine the field coils of the generator installed had been rewound. For this work to be acceptable, what kind of maintenance record would you except to find? A- FAA Form 337. B- Repair station maintenance release. C- Either A or B. For which of the following would you expect to find a maintenance release? A- Straightening of steel blades. B- Repair of a propeller governor. C- Either A or B. Which of the following would be considered a propeller major repair? A- Straightening of steel blades. B- Repair of a propeller governor. C- Both A and B. Which of the following would be considered a propeller major repair? A- Straightening of aluminum blades. B- Repair of a propeller governor. C- Both A and B. During the records review at annual inspection, for which of the following would you expect to find a repair station maintenance release? 1. Straightening of an aluminum propeller blade. 2. Repair of a propeller governor. A- 1 B- 2. C- Both 1 and 2. If a repair station does a major repair and uses a maintenance release and an FAA Form 337, which of the following would require a statement for return to service? A- Maintenance release. B- Form 337. C- Both A and B. If a repair station does a major repair and uses a maintenance release and an FAA Form 337, which of the following would require a description of the work performed? A- Maintenance release. B- Form 337. C- Both A and B. A major repair has been completed and you as the inspecting IA have approved the aircraft for return to service. How will you distribute the copies of FAA Form 337? A- Both copies are returned to the person who performed the work. B- One copy is placed in the aircraft records and one copy is sent to the FAA District Office within 48 hours. C- One copy is given to the aircraft owner, one is sent to the FAA District Office within 48 hours and one copy is placed in your records. 14 CFR Part 43 contains several appendixes that deal with maintenance, inspection, repair, alteration, and recordation. Which appendix specifies various alterations, the performance of which is a major alteration? A- Appendix A. B- Appendix B. C- Appendix C. 14 CFR Part 43 contains several appendixes that deal with maintenance, inspection, repair, alteration, and recordation. Which appendix provides information on the recording of major repairs and major alterations? A- Appendix A. B- Appendix B. C- Appendix C. During an annual inspection, in accordance with 14 CFR Part 43, Appendix D, the altimeter instrument must be inspected for A- marking. B- calibration. C- both of the above. The maintenance release used by a repair station to approve a major repair for return to service must be signed by whom? A- An inspection authorization. B- The A&P mechanic performing the work. C- An authorized representative of the repair station. Who has the primary responsibility for determining if a repair or alteration is major or minor? A- The FAA inspector in whose area of responsibility the work is accomplished. B- The person making the repair or alteration. C- The FAA regional engineer responsible for the area where the work is performed. While reviewing the records of an aircraft during an annual inspection, a major repair by a certificated repair station was noted. The repair was recorded on a work order containing a maintenance release from the repair station. However, no FAA Form 337 could be found in the records. What action should you take as the holder of an inspection authorization? A- Contact the repair station and have them send you an FAA Form 337 for the repair. B- Inform the aircraft owner of the oversight and allow he or she to make arrangement for the form. C- No further action is necessary. Which of the following would NOT be a propeller major repair? A- Replacement of tip fabric. B- Refinishing the blades. C- Shortening of blades on a wood propeller. You have been asked to inspect and approve for return to service the relocation of a battery. The specific installation will follow the general guidelines of a Supplemental Type Certificate, with the exception that the battery is located 6 inches aft of the location shown on the Supplemental Type Certificate. The aft center-of-gravity limit is exceeded by 0.1 inch. Concerning the installation, which of the following is true? A- The deviation to the Supplemental Type Certificate is in itself a major alteration and will require additional approval. B- The installation could be approved for return-to-service if an inspection authorization inspects and approves the deviation. C- The exceeding of the aft center-of-gravity by 0.1 inch is shown to be negligible by AC 43.13-1B and may be approved as a minor alteration. A repair station may use a maintenance release in place of an FAA Form 337 for which of the following work? A- Major repairs. B- Major alterations. C- Either A or B. Following the installation of extended range fuel tanks in the baggage compartment of a Cessna model 310, you, as the approving authorized inspector, make the required record entries in the aircraft's records and complete the FAA Form 337. What is the distribution of the form? A- One copy is given to the aircraft owner and one is sent to the FAA Aircraft Registration Branch in Oklahoma City, OK within 48 hours. B- One copy is sent to the FAA Aircraft Registration Branch in Oklahoma City, OK within 48 hours, one copy is placed in the aircraft and one is given to the owner. C- One copy is placed in the aircraft, one copy is sent to the FAA Aircraft Registration Branch in Oklahoma City, OK within 48 hours, and one copy is placed in your records. An aircraft has a cracked aileron control bracket. To restore the aircraft to an airworthy condition, a certificated airframe mechanic reinforces the bracket. This procedure would constitute a? A- major repair. B- major alteration. C- minor repair. When a repair station makes a major repair to an appliance, the repair may be recorded on a tag attached to the product or on the customer's work order. In either case, the document used must include what information? A- Name of part. B- Date of manufacture. C- Both A and B. When a repair station makes a major repair to an appliance, the repair may be recorded on a tag attached to the product or on the customer's work order. In either case, the document used must include what information? A- Name of part. B- Manufacturer's name. C- Both A and B. When a repair station makes a major repair to an appliance, the repair may be recorded on a tag attached to the product or on the customer's work order. In either case, the document used must include what information? A- Manufacturer's name. B- Date of manufacture. C- Both A and B. When a repair station makes a major repair to an appliance, the repair may be recorded on a tag attached to the product or on the customer's work order. In either case, the document used must include what information? A- Model. B- Manufacturer's name. C- Both A and B. When performing a static pressure system test, as required by 14 CFR 91.411, the technician must A- determine that leakage is within established and allowable limits. B- ensure the system is free from entrapped moisture and restrictions. C- Both A and B. Which of the following readings is not an acceptable altitude readout for a barometric pressure reading of 25.842? A- 4,025 feet. B- 4,046 feet. C- 3,965 feet. When conducting a case leak test at an indicated altitude of 18,000 feet, the leakage of the altimeter case shall not change the altimeter reading by more than A- +or- 50feet. B- +or- 100 feet. C- Neither A nor B. Upon successful completion of an altimeter test, what information is to be recorded on the altimeter? A- The date of the inspection and the minimum altitude to which it was tested. B- The date of the inspection and the certificate number of the repair station performing the test. C- The date of the inspection and the maximum altitude to which it was tested. In conjunction with your performance of an annual inspection on an aircraft, you determine that the aircraft cannot be approved for return to service due to the fact that one of the following items is missing. Which item is it? A- Airworthiness certificate. B- Aircraft registration. C- Aircraft data plate. When conducting the ATC transponder test, the radio reply frequency for a Class 1A transponder is A- 1090 +or- 3 MHz. B- 1090 +or- 1 MHz. C- Neither A nor B. When conducting the RF peak output power test, the minimum RF peak output for Class 1B and 2B transponders is A- 70 watts. B- 125 watts. C- 500 watts. Parts Manufacturer Approval (PMA) parts not having mandatory replacement times, inspection intervals, or related procedure specified in the airworthiness limitations section of a manufacturer's maintenance manual, or instructions for continued airworthiness, are NOT required to be marked with what information? A- The letters "FAA PMA." B- The trademark. C- The serial number. Parts Manufacturer Approval (PMA) parts are required to be marked with certain information among which is the name and model designation of each type certificated product on which the part is eligible for installation. When that information is so extensive it is impractical to mark on the part, a tag attached to the part or the part's container the information may be A- included on an FAA Form 337 to accompany the part and be completed at the time of installation. B- included in a readily available catalog. C- included in the original type certificate data sheet. Aircraft, aircraft engines, propellers, and propeller blades and hubs are required to be marked with certain identification data. An aircraft engine requires which of the following? (1) Builder's name. (2) Model designation. (3) Builder's serial number. (4) Type certificate number, if any. (5) Production certificate number, if any. (6) The established rating for aircraft engines. A- 1, 3, 4, and 6. B- 1, 2, 3, and 6. C- All of the above. Aircraft, aircraft engines, propellers, and propeller blades and hubs are required to be marked with certain identification data. A fixed-pitch propeller requires which of the following? (1) Builder's name. (2) Model designation. (3) Builder's serial number. (4) Type certificate number, if any. (5) Production certificate number, if any. (6) Part number (or equivalent). A- 1, 3, 4, and 6. B- 1, 2, 3, and 6. C- 1, 2, 3, 4, and 5. Aeronautical parts, for which a replacement time is specified in the airworthiness limitations section of the manufacturer's maintenance manual, shall be marked with which of the following information? (1) Builder's name. (2) Model designation. (3) Serial number (or equivalent). (4) Type certificate number, if any. (5) Production certificate number, if any. (6) Part number (or equivalent). A- 3 and 6. B- 1, 2, and 3. C- All of the above. A small U.S. -registered aircraft built at least 30 years ago may display registration marks of what size? A- 2 inch. B- 12 inch. C- Either A or B. What are the height requirements for the registration marks of a 1975 Cessna model 177RG repainted in 1994? A- 2 inches. B- 3 inches. C- 12 inches. What regulation in 14 CFR sets forth the required identification markings on U.S. markings on U.S. -registered civil aircraft? A- 14 CFR Part 43. B- 14 CFR Part 45. C- 14 CFR Part 47. What size registration marks would an Experimental "exhibition" aircraft registered in 1994 have? A- 2-inch. B- 3-inch. C- 12-inch. An amateur-built aircraft recently registered in the U.S. has a maximum speed of 180 mph. What size nationality and registration markings are required? A- 2-inch. B- 3-inch. C- 12-inch. An amateur-built aircraft recently registered in the U.S. has a maximum speed of 180 mph. What size nationality and registration markings are required? A- 2-inch. B- 3-inch. C- 12-inch. Aircraft registration and markings (N Numbers) on fixed wing aircraft must be 12 inches high except A- exhibition aircraft.