TM 1-1520-238-23
1-402
Change 9
1.137.
SPECIAL INSPECTION CHECKLIST – continued
Helicopter Serial No.:
Date:
Area
No.
REQUIREMENT
EVERY
Item
Status
Special
Inspection
No.
6
35
WHEN PRIMARY AND/OR UTILITY HYDRAULIC PRESSURE HAS BEEN AT
3400 PSI OR HIGHER FOR FIVE MINUTES OR MORE.
a. Inspect the appropriate hydraulic system (primary/utility) for signs of
overheated conditions.
WARNING
Do not touch any component that is suspected of being overheated
until it has cooled. Overheated components can cause burns if they
come in contact with skin. If burns occur, seek medical aid.
(1) Check hydraulic manifolds, actuators, pumps, etc. for high heat
radiation.
(2) Check connectors associated with hydraulic components for melted
potting compound.
(3) Check B nuts for melted torque stripes.
(4) Check all hydraulic components for heat induced discoloration.
b. Replace any component(s) displaying clear evidence of overheating.
c. Replace discrepant hydraulic pump (primary/utility) (para 7.4/para 7.58).
1
36
ANYTIME THE TADS/PNVS IS REMOVED INSPECT TADS/PNVS SUPPORT
FITTINGS AND BUSHINGS.
If cracks are suspected, perform nondestructive inspection (TM 1-1520-264-23).
a. Check support fittings for cracks, distortion, corrosion, and dirt. Use
10-power magnifier for crack check.
b. Check seals for deterioration, leakage, and improper fit.
c. Check upper (brass) bushings for out-of-round condition or distortion.
d. Replace discrepant bushings (para 2.46A).
GO TO NEXT PAGE
