TM 1-1520-238-23
1-378
1.137.
SPECIAL INSPECTION CHECKLIST – continued
Helicopter Serial No.:
Date:
Area
No.
REQUIREMENT
EVERY
Item
Status
Special
Inspection
No.
4,6
14
(cont)
e. Check main and tail rotor heads with special attention to:
(cont)
(1) Strap packs: cracks, buckling, and edge failures.
(2) Blade mount areas: cracks and distortion.
f. Install tail rotor blades.
g. Install main rotor blades.
Rotor speed greater than 119%:
Replace main rotor and tail rotor heads and blades.
2
15
AFTER EACH GRAVITY REFUELING OPERATION
PN 7-117420021-3 fuel flapper valve installations:
a. Leave filler ports open, after refueling.
b. Close filler ports.
6
16
250-HOUR PHASED INSPECTION
Check ADS resilient mount for tears:
a. Determine if damage extends through the mount if tear exists. Use feeler
gage. Replace mount if tear extends through mount and 45 degrees
around circumference.
b. Check resilient mount at 125-hour intervals if tear is less than above limits.
c. Continue inspection at 250-hour intervals if no tears exist.
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