AMT Sheet Metal Structural Repair 2

Question 1

When performing a flush patch repair on aircraft skin, the patch must overlap the damaged area by at least how many rows of rivets?

Accepted Answer

Two rows

Answer

A flush patch must overlap the damage by at least two rows of rivets to restore original strength.

Question 2

What is the primary purpose of a joggle in sheet metal repair?

Accepted Answer

To allow overlapping sheets to lie flush without a step

Answer

A joggle is an offset formed in sheet metal to allow two overlapping pieces to remain flush on the surface.

Question 3

Which type of rivet is most commonly used in aircraft sheet metal repairs to original structure?

Accepted Answer

MS20470 (AN470) universal head

Answer

The MS20470 (AN470) universal head rivet is the most widely used rivet for general aircraft sheet metal repairs.

Question 4

What is the minimum edge distance for a rivet in a sheet metal repair?

Accepted Answer

2D (2 times the rivet diameter)

Answer

Minimum edge distance for rivets is 2D (twice the rivet diameter) measured from the center of the rivet to the edge of the sheet.

Question 5

When selecting replacement rivets for a sheet metal repair, you find the original rivets are 2117-T4. What is the primary advantage of this rivet material?

Accepted Answer

It can be driven in the as-received condition without heat treatment

Answer

2117-T4 (AD) rivets are field-ready because they do not require refrigeration or re-heat treatment before driving.

(AMT) Aviation Maintenance Technician Practice Test

(AMT) Aviation Maintenance Technician Practice Test

AMT Sheet Metal Structural Repair 2