Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task A. Metallic Structures

AM.II.A.S12

Skill

Countersink rivet holes in sheet metal.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Airframe p. 4-91
Chapter 4: Aircraft Metal Structural Repair › Repairability of Sheet Metal Structure › Inspection of Riveted Joints
Assessment of Damage Before starting any repair, the extent of damage must…
Aviation Maintenance Technician Handbook - Airframe p. 4-40
Chapter 4: Aircraft Metal Structural Repair › Solid Shank Rivet › Countersunk Rivets
thickness of the sheets to the depth of the rivet head. Use the proper degree and diameter countersink and cut only deep enough for the rivet head and metal to form a flush surface. Countersinking is an important factor ... patterns, as the removal of material in the countersinking process necessitates an increase in the number of fasteners to assure the required load-transfer strength. If countersinking is done on metal below a certain thickness, a knife edge with less…