POWER TURBINE (N2) CONTROL SYSTEM VISUAL CHECK 4-6.2 (Continued)

4-6.2 POWER TURBINE (N2) CONTROL SYSTEM VISUAL CHECK

4-6.3 POWER TURBINE CONTROL SYSTEM (N2) OPERATIONAL CHECK

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 4-6.2 POWER TURBINE (N2) CONTROL SYSTEM VISUAL CHECK 4-6.2 (Continued) TASK RESULT 1. Check four EMERG ENG TRIM switches If any switch (1) is loose or damaged. tighten or (1). replace it as required. 2. Check two ENG INE BEEP TRIM If any switch (2) is loose or damaged, tighten or switches (2) on pilot's thrust lever grip (3). replace it as required. 3. Check two ENG INE BEEP TRIM If any switch (2) is loose or damaged, tighten or switches (2) on copilot's thrust lever grip replace it as required. (4). 4. Check two engine droop eliminator If either resistor Is damaged, replace it. If wiring to variable resistors (5). either resistor is damaged, repair or replace it as required. 5. Check No. 1 N2 control box (6). If box (6) is loose or damaged, tighten or replace it as required. If connector to box is loose or damaged, tighten or replace it as required. If wir- ing to connector is damaged, repair or replace it as required. 6. Check No. 2 N2 control box (7). If box (7) Is loose or damaged, tighten or replace it as required. If connector to box Is loose or damaged, tighten or replace it as required. If wir- ing to connector Is damaged, repair or replace it as required. 7. Check No. 2 engine trim relay (8) and If either relay (8 or 9) is loose or damaged, tighten No. 2 emergency engine trim relay (9). or replace it as required. If wiring to either relay is loose or damaged, tighten or replace It as re- quired. 8. Check No 1 engine trim relay (10) and No 1 If either relay (10 or 11) Is loose or damaged, emergency engine trim relay (11) tighten or replace It as required. If wiring to either relay Is loose or damaged, tighten or replace it as required. 9. Check power turbine control actuator If actuator ( 12) Is loose or damaged, tighten or re- (12) on No. 1 engine (13) place it as required. If connector to actuator is loose or damaged. tighten or replace engine-to- airframe harness. 10. Check power turbine control actuator If actuator (12) Is loose or damaged. tighten or re- (12) on No. 2 engine (14). place it as required. If connector to actuator Is loose or damaged. tighten or replace engine-to- airframe harness FOLLOW-ON MAINTENANCE: None END OF TASK 4-119

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