EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK

EXTERNAL CARGO HOOK SYSTEM VISUAL CHECK (Continued) - TM-55-1520-240-T-3_843

EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-3_845

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 16-1.4 EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK 16-1.4 INITIAL SETUP Personnel Required: Applicable Configurations: Medium Helicopter Repairer (2) All References: Tools: TM 55-1520-240-23 Rope, 15 Foot Equipment Condition: Without 35 Load 20-25 Pounds (3) TM 55-1520-240-23: With 35 Load, 20-25 Pounds (2) Fwd and Aft Hook Battery Connected Load, 45-50 Pounds (1) Center Hook Electrical Power On Wood Plank, 2-Inches x 4-Inches x 4-Feet Hydraulic Power On Dial Indicating Scale, 0 to 50 Pounds Visual Check Of External Cargo Hook System Stopwatch Performed (Task 16-1.3) Inspection Mirror Area Beneath Three Cargo Hooks Clear Of Materials: Obstructions None TASK RESULT 1. Check that MASTER switch (1) is OFF. If switch (1) is not OFF, set it to OFF. 2. Check that HOOK SELECT switch (2) is at FWD. If switch (2) is not at FWD, set it to FWD. 3. Check that switch guard (3) over EMERG switch is If switch guard (3) is up, close it. down. 4. Check that CARGO HOOK switch (4) is at RMTE. If switch (4) is not at RMTE, set it to RMTE. 5. Check FWD and AFT HOOK LOADED LIGHT lights (5 Both lights (5 and 6) shall be out. If either light is on, go to and 6). Task 16-1.5. 6. Press and release FWD HOOK LOADED light (5). Light (5) shall momentarily come on. If it does not, go to Task 16-1.6. 7. Press and release AFT HOOK LOADED light (6). Light (6) shall momentarily come on. If it does not, go to Task 16-1.6. 8. Check that CARGO HOOK EMR REL PWR and CONT If CARGO HOOK EMER REL PWR or CONT circuit circuit breakers (7 and 8) are closed. breaker (7 or 8) is open, close it. If EMERG REL PWR circuit breaker (7) opens again, go to Task 16-1.7. If EMER REL CONT circuit breaker (8) opens again, go to Task 16-1.8. 9. Check that CARGO HOOK NORM RLSE PWR and If CARGO HOOK NORM RLSE PWR or CONT circuit CONT circuit breakers (9 and 10) are closed. breaker (9 or 10) is open, close it. If NORM RLSE PWR circuit breaker (9) opens again, go to Task 16-1.9. If NORM RLSE CONT circuit breaker (10) opens again, go to Task 16-1.10. GO TO NEXT PAGE 16-10 Change 23 Page 16-9 is a blank page.

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