CLEAN AND INSPECT CARGO DOOR PRESSURE ACTUATED VALVE (Continued)

CLEAN AND INSPECT CARGO DOOR PRESSURE ACTUATED VALVE

REPAIR CARGO DOOR PRESSURE ACTUATED VALVE

TM-55-1520-240-23-6 CH-47D Heilcopter Manual
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TM 55-1520-240-23-6 7-283.2 CLEAN AND INSPECT CARGO DOOR PRESSURE ACTUATED VALVE (Continued) 7-283.2 4. Measure outside diameter of three lands (6) of piston (7). Diameter shall not be less than 0.5575 inch. The seating surface shall have a sharp edge and be free from nicks and burrs. 5. Measure bore (8) of valve body (9) that mates with piston (7). Diameter shall not be more than 0.5640 inch. 6. Inspect springs (10, 11, and 12) for distortion by rolling on a flat surface. There shall be no wobble present. 7. Measure free length of springs (10, 11, and 12): a. Length of spring (10) shall be between 0.600 and 0.630 inch. b. Length of spring (11) shall be between 0.703 and 0.733 inch. c. Length of spring (12) shall be between 0.845 and 0.865 inch. 8. Measure compressed length of springs (10, 11, and 12) in a spring compression tester (13): a. With 0.28 pound of force applied, length of spring (10) shall not be less than 0.280 inch. b. With 26.0 pounds of force applied, length of spring (11) shall not be less than 0.562 inch. c. With 3.85 pounds of force applied, length of spring (12) shall not be less than 0.450 inch. FOLLOW-ON MAINTENANCE: Repair cargo door pressure actuated valve (Task 7-283.3). END OF TASK 7-1054

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