AMS 261 Unit 5 Test – Study Guide, Practice Questions & Revision Notes
What is the primary objective of an aircraft repair? - ANS ✔✔Restore the damaged parts to
their original condition
What is a basic principal of sheet metal repairs? - ANS ✔✔Understanding the damaged part(s)
purpose or function
What are 3 things you want to do when repairing sheet metal? - ANS ✔✔Maintain Strength,
Minimize Weight, Maintain Original Contour
What are the 3 Classifications of damage? - ANS ✔✔Negligible, Repairable, Replacement
What is the definition of negligible damage? - ANS ✔✔- Damage that does not affect the
structural integrity of the part
- Does not affect the airworthiness of the aircraft
- Can be corrected by a simple procedure without placing flight restrictions on the aircraft.
Negligible damage examples - ANS ✔✔- Removing or filling dents
- Stop-drilling crack
- Burnishing scratches
When would we replace a part instead of repairing? - ANS ✔✔- Damage beyond Manufacturer's
limitations
- Extensively damaged complicated part
, - Cheaper
-The location makes repair difficult
- Tools and equipment required to make the repair are not available
When would we repair a part? - ANS ✔✔If the damaged part doesn't match the reasons for
replacing, then repairing would be the likely choice
What are the 5 things we evaluate for the repair? - ANS ✔✔Size, #of rivets, Strength, Thickness,
Material
Cross sectional area of splice or patch should be what? - ANS ✔✔Equal or greater than the
damaged area
What shape should cutouts be? - ANS ✔✔Rectangular, circular or oval
Corner radius for a rectangle cutout - ANS ✔✔1/2"
If a damaged member is subject to compression or bearing loads where should the patch be
placed? - ANS ✔✔Outside of the member otherwise one gage thicker than original material
What do we use if the alloy is weaker than the original material? - ANS ✔✔Use a thicker
material
What condition do we form strong alloys - ANS ✔✔Annealed condition and then heat treated
after forming
What is the primary objective of an aircraft repair? - ANS ✔✔Restore the damaged parts to
their original condition
What is a basic principal of sheet metal repairs? - ANS ✔✔Understanding the damaged part(s)
purpose or function
What are 3 things you want to do when repairing sheet metal? - ANS ✔✔Maintain Strength,
Minimize Weight, Maintain Original Contour
What are the 3 Classifications of damage? - ANS ✔✔Negligible, Repairable, Replacement
What is the definition of negligible damage? - ANS ✔✔- Damage that does not affect the
structural integrity of the part
- Does not affect the airworthiness of the aircraft
- Can be corrected by a simple procedure without placing flight restrictions on the aircraft.
Negligible damage examples - ANS ✔✔- Removing or filling dents
- Stop-drilling crack
- Burnishing scratches
When would we replace a part instead of repairing? - ANS ✔✔- Damage beyond Manufacturer's
limitations
- Extensively damaged complicated part
, - Cheaper
-The location makes repair difficult
- Tools and equipment required to make the repair are not available
When would we repair a part? - ANS ✔✔If the damaged part doesn't match the reasons for
replacing, then repairing would be the likely choice
What are the 5 things we evaluate for the repair? - ANS ✔✔Size, #of rivets, Strength, Thickness,
Material
Cross sectional area of splice or patch should be what? - ANS ✔✔Equal or greater than the
damaged area
What shape should cutouts be? - ANS ✔✔Rectangular, circular or oval
Corner radius for a rectangle cutout - ANS ✔✔1/2"
If a damaged member is subject to compression or bearing loads where should the patch be
placed? - ANS ✔✔Outside of the member otherwise one gage thicker than original material
What do we use if the alloy is weaker than the original material? - ANS ✔✔Use a thicker
material
What condition do we form strong alloys - ANS ✔✔Annealed condition and then heat treated
after forming
