AFT ROTOR AND PYLON AREA (LEFT SIDE)

Seq.

No.

Item and Procedure

No.

Item and Procedure

11.6

12.6

Tailpipe, exhaust diffuser, inner cone, and power turbine

Rotary-wing blades for damage, cracks, and unbonding.

for cracks, hot spots, and burned areas. Tailpipe for

Trim tabs for cracks, damage, and unbonding. Tip

security and for presence of fuel, oil, or foreign objects.

covers for damage and security. Nose cap for damage

and unbonding. Shock absorber attachment brackets,

11.7

Upper cowling for security, closed and latched.

including filament windings filler material, for cracks and

AFT ROTOR AND PYLON AREA (LEFT SIDE)

voids. Check blade root end up to, but not including, first

12.1

Inspect left work platform door for delamination, cracks,

lag damper bracket winding for cracks. Ensure bottom

and security. Latch pins and latch plates (FWD and AFT)

surface of blade root end is not contacting pitch varying

for wear, cracks, and elongation.

housing lug.

Pitch links for chafing, damage, and security. Upper and

12.2

Aft rotary-wing head reservoirs (hub, pitch-varying, and

12.7

vertical pin) for proper oil levels. Entire assembly for leaks

lower bearings for liner unbonding. Pitch link boots and

and security of components and hardware. Blade jumper

weather protective cover for condition.

wires for security, cuts, kinks, or fraying. Sight glasses for

12.8

Drive arms and collar for damage and security of

clarity and signs of metallic particles in reservoir. Rotor

hardware.

hub for damage.

12.9

Swashplate for signs of damage, overheating, and

12.3

Inspect horizontal hinge pin bolt P/N 114R2201-1 for

accumulation of grease. Using a flashlight or other

broken heads and security by applying hand pressure to

suitable light source, visually inspect with a mirror or

the head of the bolt to assure the adhesive is not holding

flexible borescope the area between the underside of

the bolt head in place.

the rotating ring and stationary ring for any slinging or

12.4

Centrifugal droop stop springs and attaching hardware for

clumping of grease/debris (i.e. seal, bearing cage, seal

security. Limiter springs for wear and chafing. Droop stop

spring, wire, or other material). A thin bead of grease

shrouds for security and damage (if installed).

around the sealing area is considered normal.

12.5

Rotary-wing blade shock absorbers for leaks and proper

12.10

Aft vertical shaft and bearing for signs of overheating

oil levels. Exposed portion of piston rods for cleanliness.

and leakage. Aft rotor shaft and pressure switch and

Vent valves for proper positions. Lockwasher tang for

surrounding area for oil leakage.

engagement in piston slot.

"FOD REMINDER"

CHECK WORK AREA FOR TOOLS AND PARTS AFTER COMPLETION OF MAINTENANCE AND INSPECTION.

TM 55-1520-240-PMD

Change 1 21