TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR (ILCA) (AVIM) (Continued)

TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR (ILCA) (AVIM) (Continued) - TM-55-1520-240-23-6_433

TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR (ILCA) (AVIM) (Continued) - TM-55-1520-240-23-6_435

TM-55-1520-240-23-6 CH-47D Heilcopter Manual
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TM 55-1520-240-23-6 7-98 TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR (ILCA) (AVIM) (Continued) 7-98 TEST 4 EXTENSIBLE LINK CROSS FEEDBACK TRANSDUCER NULL VOLTAGE TEST (SPARE) NOTE Tests 2, 3, 4, and 5 MUST be performed in sequence. 52. Perform steps 1 thru 40. Check initial control and valve settings in steps 22 and 23. 53. Set hydraulic unit controls as follows: a. ILCA PRESS SYS 1 valve (1) to VENT. b. ILCA PRESS SYS 2 valve (2) to VENT. c. SAS PRESS SYS 1 valve (3) to VENT. d. SAS PRESS SYS 2 valve (4) to VENT. e. RETURN SYS 1 valve (5) to RETURN. f. RETURN SYS 2 valve (6) to RETURN. 54. Set electrical unit controls as follows: a. SAS 1 & SAS 2 FUNCTION SELECT switch (30 & 31) to BALANCE. b. SAS 1 & SAS 2 FEEDBACK SELECT switch (32 & 33) to CROSS. c. SAS 1 & SAS 2 LINK TEST switch (38 & 39) to CROSS FDBK. d. SYSTEM SELECT switch (43) to SAS 1. 55. DVM (58). Reading shall not exceed 0.0180 volts. Record reading. NOTE Reading must be recorded. This reading is needed for other tests. If reading is greater than 0.0180 volts, extensible link cross feedback transducer requires adjustment (Task 7-100). Repeat Tests 2, 3, and 4. 55.1. Set electrical and hydraulic unit controls as follows: a. SAS 1 FUNCTION SELECT switch (30) to CLSD LOOP. b. RETURN SHUTOFF valve (47) to FULL OPEN. c. SOLENOID valve (53) to OPEN. d. SOLENOID SHUTOFF switch (44) to OPENED. e. Slowly turn HIGH PRESS REGULATOR valve (52) toward INCREASE until HIGH PRESS gauge (13) indicates 1500 psi. 7-416 Change 1

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