TM 55-1520-240-T
2-1.5 VIBRATION FREQUENCY TOO RAPID TO COUNT, VIBRATION FELT IN STRUCTURE (6/REV) (Continued)
2-1.5
WAS CARGO OR FERRY FUEL
SECURE CARGO OR FERRY FUEL
TANKS SECURED TO 10,000 LB
TANKS TO ISOLATED FLOOR
TIEDOWN?
TIEDOWNS.
WAS CARGO OR FERRY FUEL
TANKS CORRECTLY SECURED
RE-SECURE CARGO OR FERRY
TO ISOLATED FLOOR?
FUEL TANKS.
STOP ENGINES. OPEN TUNNEL
COVERS. OPEN AFT DRIVE
SHAFT ACCESS PANELS. OPEN
AFT TRANSMISSION BAFFLES.
CHECK FORWARD AND AFT
DRIVE SHAFT MOUNTS. ARE
ANY MOUNTS BROKEN OR EX-
CESSIVELY WORN?
INSPECT FORWARD AND AFT
DRIVE SHAFTS. REFER TO TM
55-1520-240-23. IS ANY
SHAFT DAMAGED OR MISSING
BALANCE WEIGHTS?
CHECK FWD AND AFT LCT AC-
TUATORS RIGGING. ADJUST IF
INCORRECT.
REPLACE WORN OR BROKEN
DRIVE SHAFT MOUNTS,
END OF TASK
Change 5
2-13
