FLIGHT CONTROL HYDRAULIC SYSTEM OPERATIONAL CHECK (Continued)

FLIGHT CONTROL HYDRAULIC SYSTEM OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-1_675

FLIGHT CONTROL HYDRAULIC SYSTEM OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-1_677

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 7-1.4 FLIGHT CONTROL HYDRAULIC SYSTEM OPERATIONAL CHECK (Continued) 7-1.4 TASK RESULT 20. Set FLT CONTR switch (14) to BOTH. NO. 1 HYD FLT CONTR (Without 74 ) capsule (12) shall go out. HYD 1 (With 74 ) capsule (12) shall go out. 21. Set POWER XFR NO. 1 switch (1) to OFF. NO. 1 HYD FLT CONTR (Without 74 ) capsule (12) shall come on. HYD 1 (With 74 ) capsule (12) shall come on. 22. Set FLT CONTR switch (14) to NO. 1 ON. NO. 2 HYD FLT CONTR (Without 74 ) capsule (13) shall stay out. If it comes on, go to Task 7-1.22. HYD 2 (With 74 ) capsule (13) shall stay out. If it comes on, go to Task 7-1.22. 23. Set FLT CONTR switch (14) to BOTH. Set POWER XFR NO. 1 HYD FLT CONTR (Without 74 ) capsule (12) shall NO. 1 switch to ON. go out. HYD 1 (With 74 ) capsule (12) shall go out. 24. Set POWER XFR NO. 2 switch (2) to OFF. NO. 2 HYD FLT CONTR (Without 74 ) capsule (13) shall come on. HYD 2 (With 74 ) capsule (13) shall come on. 25. Set FLT CONTR switch (14) to NO. 2 ON. NO. 1 HYD FLT CONTR (Without 74 ) capsule (12) shall stay out. if it comes on, go to Task 7-1.23. HYD 1 (With 74 ) capsule (12) shall stay out. If it comes on, go to Task 7-1.23. 26. Set FLT CONTR switch (14) to BOTH. Set POWER NO. 2 HYD FLT CONTR (Without 74) capsule (13) shall XFR NO. 2 switch to ON. go out. HYD 2 (With 74) capsule (13) shall go out. 27. Have pilot start engines and establish 100 percent rotor NO. 1 and NO. 2 HYD FLT CONTR (Without 74) rpm. Set POWER XFR NO. 1 and NO. 2 switches (1 and capsules (12 and 13) shall be out. HYD 1 and HYD 2 2) to OFF. (With 74) capsules (12 and 13) shall be out. If FLT CONT NO. 1 HYDRAULIC PRESS indicator does not read between 2500 and 3000 psi. and pointer fluctuates more than 50 psi. or capsule (12) is on, replace No. 1 flight control hydraulic system pump. If FLT CONT NO. 2 HYDRAULIC PRESS indicator does not read between 2500 and 3000 psi. or pointer fluctuates more than 50 psi and caps ule (13) is on, replace No. 2 flight control hydraulic system pump. TASK RESULT 28. Check NO. 1 and NO. 2 PUMP FAULT lights (34 and If either light (34 or 35) is on, go to Task 7-1.24. 35). FOLLOW-ON MAINTENANCE: Have pilot shut down engines. TM 55-1520-240-23: Remove electrical power. Disconnect battery. GO TO NEXT PAGE 7-18 Change 17

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