TM    55-1520-240-T 8 - 5 . 3    P O W E R    T U R B I N E    I N L E T    T E M P E R A T U R E    S Y S T EM OPERATIONAL   CHECK   AND   EMERGENCY   POWER INDICATING   SYSTEM   TEST   (Continued) TASK RESULT CHECK  PTIT  INDICATING  SYSTEM 1. 2. 3. 4. 5. 6. 7. 8. 9. Check  that  ENGINE  NO.  1  TRIM  & TIMER circuit breaker (1)  is closed. Check  that  ENGINE  NO.  1  START  & TEMP circuit breaker (2)  is closed. Check  that  ENGINE  NO.  2  TRIM  & TIMER  circuit  breaker  (3)  is closed. Check  that  ENGINE  NO.  2  START  & TEMP circuit breaker (4)  is closed. Momentarily  press copilot’s EM ERG PWR light  (5). Momentarily press pilot’s EM ERG PWR light  (5). Have pilot start engines and stabilize rotors at 100% rotor rpm. Check  NO.  1  ENGINE  PTIT  indicator (6). Check  NO.  2  ENGINE  PTIT  indicator (7). TEST  EMERGENCY  POWER  INDICATING SYSTEM Do not reset striped flag unless proper log entry was made and any required engine inspection is completed.  Striped  flag  indicates engine was operating in an overtemp condition and a log book entry must be made prior to next  flight. NOTE The timer records total minutes of engine  overtemperature  This  in- formation is used to schedule engine maintenance  action. If circuit breaker (1) is open, close again, go to Task 4-6.3. If circuit breaker (2) is open, close again,  go  to  Task  4-4.4. If circuit breaker (3) is open close again, go to Task 4-6.3. it. If it opens it. If it opens it. If it opens If circuit breaker (4) is open, close it. If it opens again,  go  to  Task  4-4.4. Light (5) shall come on If not, go to Task 8-5.4. Light (5) shall come on. If not, go to Task 8-5.4. Indicator  (6)  shall  read  in  green  band. Task 8-5.5. Indicator (7) shall read in green band. Task  8-5.6 If not go to If not go to 8 - 5 . 3 TASK RESULT 10. Check  pilot’s  and  copilot’s  EM  ERG  PWR Both lights (5) shall be out. If not, go to Task 8- Iights (5). 5.7. 11.  Check  EMERGENCY  POWER  panel  (8). NO. 1 and NO. 2 ENGlNE timers (9 and 12) shall not be operating. If either timer  IS operating,  re- place EMERGENCY POWER panel. NO. 1 and N0. 2 ENGINE flag indicators (10 and 13) shall be black. If not, reset NO. 1 or NO. 2 ENG FLAG RESET switches (11 and 14). If indica- tors do not reset to black, go to Task 8-5.8. 12. Have pilot shut down both engines The following procedure simu- lates  engine  overtemperature  to check out indicator and timer cir- cuits. The timer will operate, therefore,  follow  procedures closely to avoid excessive time being added to engine overtemperature  time. 13.  Disconnect  plug  (15)  at  NO.  1  ENGINE disconnect  shelf.  Connect  cable  from  tester into  receptacle  (16)  with  test  harness  T140. Have helper observe NO. 1 ENGINE PTIT indicator  (6).  Increase  millivolt  output  from tester  until  PTIT  indication  is  820°C.  Check EMERGENCY  POWER  panel  (9). NO 1 ENGINE timer (9) shall not be operating. If it is, replace NO. 1 ENGINE PTIT indicator. NO 1 ENGINE flag indicator (10) shall be black. If it is striped, replace NO 1 ENGINE PTIT Indicator (6) GO   TO   NEXT   PAGE Change   1 8 - 79