AMS 261 UNIT 5 (Latest Update 2026 /
2027) Questions & Answers {Grade A }
100% Correct
What is the minimum radius for a rectangle patch of plug? - correct answer 0.5"
HMV - correct answer Heavy Maintenance Visit
DER - correct answer Designated Engineering Representative
SSI - correct answer Structural significant Items
Shear strength vs bearing strength in metal repair - correct answer The joint is
critical in Shear if less than the optimum number of fasteners are installed and
critical in bearing if more than the optimum number of fasteners are installed
, Lap / Scab Patch - correct answer An external patch riveted to the skin, often using
a doubler as extra support
Flush Patch (Plug) - correct answer A filler patch that is flush to the skin,
supported by a doubler plate. Typically used in aerodynamic areas
How do you determine thickness of doubler? - correct answer Same material, but
one gauge thicker
Minimum rivet diameter rule - correct answer Rivet diameter should not be less
than 3X the thickness of the thickest sheet of metal
Rivet diameters are measured in ____ increments. - correct answer 1/32"
2027) Questions & Answers {Grade A }
100% Correct
What is the minimum radius for a rectangle patch of plug? - correct answer 0.5"
HMV - correct answer Heavy Maintenance Visit
DER - correct answer Designated Engineering Representative
SSI - correct answer Structural significant Items
Shear strength vs bearing strength in metal repair - correct answer The joint is
critical in Shear if less than the optimum number of fasteners are installed and
critical in bearing if more than the optimum number of fasteners are installed
, Lap / Scab Patch - correct answer An external patch riveted to the skin, often using
a doubler as extra support
Flush Patch (Plug) - correct answer A filler patch that is flush to the skin,
supported by a doubler plate. Typically used in aerodynamic areas
How do you determine thickness of doubler? - correct answer Same material, but
one gauge thicker
Minimum rivet diameter rule - correct answer Rivet diameter should not be less
than 3X the thickness of the thickest sheet of metal
Rivet diameters are measured in ____ increments. - correct answer 1/32"
