5-63 Main Rotor Strike
The main rotor strike inspection is listed in two parts. Part 1 concerns contact of main
rotor blades with object in free air such as small stones, brush, small birds, etc. Part 2
is concerned with sudden stoppage of main rotor due to ground or solid object contact.
1. If main rotor blade has contacted a small object in free air such as small stones, brush,
small birds, etc., inspect main rotor blades as follows:
a. Verify any nicks, scratches, and dents are within § 62-10 limits; repair as required.
b. Visually inspect trailing edge of blade for evidence of buckling or bending. This will
be most evident near root of blade.
CAUTION
Any blade buckling or permanent bending is considered sudden
stoppage and requires a sudden stoppage inspection of the entire
rotorcraft.
2. If main rotor blade or blades have contacted ground or a solid object, they must be
inspected for sudden stoppage. Sudden stoppage is evident when buckling or bending
of the main rotor blades has occurred. Use the following procedure for inspecting
rotorcraft after main rotor sudden stoppage has occurred:
a. Perform tail rotor drive shaft runout per § 65-21.
b. Visually inspect G027 scroll assembly and F193 bearing hanger for cracks and/or
deformation.
c. Remove the following components and return to RHC for inspection.
C005-10 Main Rotor System
F006 Main Rotor Gearbox
F018 Clutch Assembly
A947-2 Flex Plates
C947-3 Flex Plates
C017 Swashplate
F906 Yoke
F908 Yoke
F910 Yoke
F196 Shaft Weldment
F642 Shaft Weldment
G174 Fanwheel
d. Inspect engine for sudden stoppage per engine manufacturer’s instructions.
MAY 2015 Chapter 5 Inspections Page 5.43
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