NORTH CAROLINA AIRFRAME & POWERPLANT (A&P) EXAM –QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF.
*Core Domains:*
*• Aircraft Structural Materials and Sheet Metal Bonding*
*• Hydraulic and Pneumatic Power Systems*
*• Cabin Atmosphere Control Systems*
*• Aircraft Instrument and Electrical Systems*
*• Engine Instrument and Fire Protection Systems*
*• Reciprocating Engine Overhaul and Operation*
*• Turbine Engine Theory and Maintenance*
*• Engine Fuel and Fuel Metering Systems*
*• Federal Aviation Regulations and Maintenance Forms*
*• Weight and Balance and Ground Operations*
*Introduction:*
*The purpose of this comprehensive assessment is to evaluate the technical knowledge,
SECTION ONE
,Question 1
Which type of safety wire method is commonly used for closely spaced small screws in
an aircraft engine accessory housing?
A. Single-wire method
B. Double-twist method
C. Triple-braid method
D. Interlocking-loop method
🟢 Correct answer: A. Single-wire method
🔴 RATIONALE: The single-wire safetying method may be used on small screws, bolts,
or electrical connectors that are closely spaced or in hard-to-reach areas, provided the
safety wire does not experience high vibrational stresses that require the double-twist
method.
Question 2
While inspecting a composite control surface, an technician notes a localized dull thud
during a tap test. What does this acoustic variation indicate?
A. Proper resin-to-fiber ratio
B. Subsurface delamination or debonding
C. Overtorqued structural fasteners
D. Normal localized core density increase
,🟢 Correct answer: B. Subsurface delamination or debonding
🔴 RATIONALE: A tap test relies on acoustic response. A clear, sharp ringing sound
indicates solid, well-bonded structural material, whereas a dull thud points to a void, core
crushing, or a separation between composite laminates.
Question 3
According to 14 CFR Part 65, what is the maximum duration an FAA mechanic certificate
remains valid if it has not been suspended, revoked, or surrendered?
A. 24 calendar months
B. 5 years
C. Effective until surrendered, suspended, or revoked
D. 12 calendar months from the date of issuance
🟢 Correct answer: C. Effective until surrendered, suspended, or revoked
🔴 RATIONALE: Under federal aviation regulations, a mechanic certificate is effective
permanently or until it is surrendered by the technician, suspended by the regulatory
authority, or revoked due to enforcement actions.
Question 4
During a routine 100-hour inspection on a reciprocating engine, a mechanic discovers a
small amount of fine brass flakes in the oil oil filter element. What component is most
likely experiencing abnormal wear?
, A. Aluminum piston skirts
B. Steel cylinder walls
C. Bronze rocker arm bushings
D. Chrome-plated piston rings
🟢 Correct answer: C. Bronze rocker arm bushings
🔴 RATIONALE: Brass and bronze are copper alloys often used in bushings, such as
rocker arm or master rod bushings. Fine flakes of this copper-colored material in the oil
suggest accelerated wear of these components rather than steel or aluminum items.
Question 5
An aircraft's hydraulic system experiences a sudden loss of pressure, but the fluid level
in the reservoir remains unchanged. Which of the following malfunctions explains this
operational scenario?
A. An unseated reservoir pressure relief valve
B. A ruptured hydraulic pump seals leaking externally
C. A failure or shear of the hydraulic pump drive shaft
D. A blown main system accumulator bladder
🟢 Correct answer: C. A failure or shear of the hydraulic pump drive shaft
🔴 RATIONALE: If the pump drive shaft shears, the pump ceases to rotate and create
system pressure, yet because no fluid is escaping from the system, the fluid level within
the reservoir will remain constant.
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF.
*Core Domains:*
*• Aircraft Structural Materials and Sheet Metal Bonding*
*• Hydraulic and Pneumatic Power Systems*
*• Cabin Atmosphere Control Systems*
*• Aircraft Instrument and Electrical Systems*
*• Engine Instrument and Fire Protection Systems*
*• Reciprocating Engine Overhaul and Operation*
*• Turbine Engine Theory and Maintenance*
*• Engine Fuel and Fuel Metering Systems*
*• Federal Aviation Regulations and Maintenance Forms*
*• Weight and Balance and Ground Operations*
*Introduction:*
*The purpose of this comprehensive assessment is to evaluate the technical knowledge,
SECTION ONE
,Question 1
Which type of safety wire method is commonly used for closely spaced small screws in
an aircraft engine accessory housing?
A. Single-wire method
B. Double-twist method
C. Triple-braid method
D. Interlocking-loop method
🟢 Correct answer: A. Single-wire method
🔴 RATIONALE: The single-wire safetying method may be used on small screws, bolts,
or electrical connectors that are closely spaced or in hard-to-reach areas, provided the
safety wire does not experience high vibrational stresses that require the double-twist
method.
Question 2
While inspecting a composite control surface, an technician notes a localized dull thud
during a tap test. What does this acoustic variation indicate?
A. Proper resin-to-fiber ratio
B. Subsurface delamination or debonding
C. Overtorqued structural fasteners
D. Normal localized core density increase
,🟢 Correct answer: B. Subsurface delamination or debonding
🔴 RATIONALE: A tap test relies on acoustic response. A clear, sharp ringing sound
indicates solid, well-bonded structural material, whereas a dull thud points to a void, core
crushing, or a separation between composite laminates.
Question 3
According to 14 CFR Part 65, what is the maximum duration an FAA mechanic certificate
remains valid if it has not been suspended, revoked, or surrendered?
A. 24 calendar months
B. 5 years
C. Effective until surrendered, suspended, or revoked
D. 12 calendar months from the date of issuance
🟢 Correct answer: C. Effective until surrendered, suspended, or revoked
🔴 RATIONALE: Under federal aviation regulations, a mechanic certificate is effective
permanently or until it is surrendered by the technician, suspended by the regulatory
authority, or revoked due to enforcement actions.
Question 4
During a routine 100-hour inspection on a reciprocating engine, a mechanic discovers a
small amount of fine brass flakes in the oil oil filter element. What component is most
likely experiencing abnormal wear?
, A. Aluminum piston skirts
B. Steel cylinder walls
C. Bronze rocker arm bushings
D. Chrome-plated piston rings
🟢 Correct answer: C. Bronze rocker arm bushings
🔴 RATIONALE: Brass and bronze are copper alloys often used in bushings, such as
rocker arm or master rod bushings. Fine flakes of this copper-colored material in the oil
suggest accelerated wear of these components rather than steel or aluminum items.
Question 5
An aircraft's hydraulic system experiences a sudden loss of pressure, but the fluid level
in the reservoir remains unchanged. Which of the following malfunctions explains this
operational scenario?
A. An unseated reservoir pressure relief valve
B. A ruptured hydraulic pump seals leaking externally
C. A failure or shear of the hydraulic pump drive shaft
D. A blown main system accumulator bladder
🟢 Correct answer: C. A failure or shear of the hydraulic pump drive shaft
🔴 RATIONALE: If the pump drive shaft shears, the pump ceases to rotate and create
system pressure, yet because no fluid is escaping from the system, the fluid level within
the reservoir will remain constant.
