VIBRATION FREQUENCY TOO RAPID TO COUNT, VIBRATION FELT IN STRUCTURE (6/REV) (Continued)

2-1.5 VIBRATION FREQUENCY TOO RAPID TO COUNT, VIBRATION FELT IN STRUCTURE (6/REV)

2-1.6 ROTOR BLADE SHOCK ABSORBER ISOLATION PROCEDURE

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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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

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