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NO. 1 ENGINE AREA (UPPER SECTION)
Up
TM-55-1520-240-PMD CH-47D Helicopter Manual
Next
TUNNEL AREA
Seq.
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

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