EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM) (Continued)

EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM) (Continued) - TM-55-1520-240-23-6_405

EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM) (Continued) - TM-55-1520-240-23-6_407

TM-55-1520-240-23-6 CH-47D Heilcopter Manual
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TM 55-1520-240-23-6 7-97 EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM) (Continued) 7-97 72. Set FUNCTION SELECT switch (21) to HARD OVER EXTEND then BALANCE. Check dial indicator (3) for piston (9) movement. There shall be no movement and indicator shall indicate 1 inch. An overshoot of 0.002 to 0.005 inch is allowed, but piston shall stop within 1 second. 73. Set FUNCTION SELECT switch (21) to CLSD LOOP. 74. Set electrical and hydraulic unit controls as follows: a. HIGH PRESS REGULATOR valve (49) to DECREASE. b. HIGH PRESS SHUTOFF valve (48) to CLOSE. c. SOLENOID SHUTOFF switch (35) to CLOSED. d. SOLENOID valve (50) to CLOSED. e. AFCS PRESS SYS 1 valve (44) to VENT. f. Push and hold HIGH PRESS RELIEF valve (53) and LOW PRESS RELIEF valve (54) for 15 seconds. g. AFCS PRESS SYS 1 valve (44) to OFF. h. RETURN SYS 1 valve (42) to OFF. 75. Set LINK TEST switch (29) to VALVE. 76. Remove dial indicator (3). Stow in cover. 77. If no further testing is required, perform normal shutdown (TM 55-4920-428-13). END OF STABILITY TEST 7-390

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