TM   55-1520-240-T 4-6.3  POWER  TURBINE  CONTROL  SYSTEM  (N2)  OPERATIONAL  CHECK  (Continued) 4-6.3 TASK RESULT 14. 15. 16. 17. 18. 19. 20. 21. 22. Press  THRUST  CONT  BRAKE  TRIGGER  switch (15)  and  lift  thrust  control  full  up. Press  THRUST  CONT  BRAKE  TRIGGER  switch (15)  and  push  thrust  control  to  detent  posi- tion. Release THRUST CONT BRAKE TRIGGER switch   (15). Set  and  hold  copilot’s  NO.  1  &  2  ENGINE  BEEP TRIM  switch  (11)  and  NO.  1  ENGINE  BEEP TRIM  switch  (7)  to  RPM  DECREASE  for 30 sec- o n d s. Lift  guard  (16)  and  set  switch  (17)  to  MAN- UAL.  Set  and  hold  EMERG  ENG  TRIM  1  switch (12) to INC  until  No.  1  engine  fuel  control  pointer (8) tightly contacts clockwise stop (9).  Release switch. Set  and  hold  EMERG  ENG  TRIM  1  switch  (12) to DEC  until No. 1 engine fuel control pointer (8) contacts counterclockwise stop (14).  Release switch. Close   switch   guard   (16). Lift  guard  (18)  and  set  switch  (19)  to  MAN- UAL.  Set  and  hold  EMERG  ENG  TRIM  2  switch (13) to INC  until  No:  2  engine  fuel  control  pointer (8) lightly contacts clockwise stop (9).  Release switch. Set  and  hold  EMERG  ENG  TRIM  2  switch  (13) to DEC  until No. 2 engine fuel control pointer (8) contacts counterclockwise stop (14).  Release switch. Both pointers (8) shall move smoothly clockwise and contact stops (9). If either pointer moves errati- cally,  replace  droop  eliminator  potentiometer. Both pointers (8) shall move smoothly toward the counterclockwise mechanical stops (14). Both pointers (8) shall return to between 19° and 21°  on  protractor  (10). Pointer (8) shall stay against stop (9). If pointer has stopped  but  is  not  touching  stop,  adjust  rigging  of power  turbine  control  system.lf  pointer  returns  to between 19°and 21° on protractor (10), replace switch (17). Refer to TM 55-1520-240-23. If pointer does not move, go to task 4-6.18. Pointer (8) shall stay against stop (14). If pointer is not against stop, adjust rigging of power turbine control system. Refer to TM 55-1520-240-23. If pointer does not move, go to task 4-6.19. Pointer (8) shall stay against stop (9). If pointer has stopped  but  is  not  touching  stop,  adjust  rigging  of power turbine control system. Refer to TM 55-1520- 240-23. If pointer returns to between 19° and 21° on protractor (10), replace switch (19). If pointer does not move, go to task 4-6.20. Pointer (8) shall stay against stop (14). If pointer is not against stop, adjust rigging of power turbine control system. Refer to TM 55-1520-240-23. If pointer does not move, go to task 4-6.21. FOLLOW-ON   MAINTENANCE: TM  55-1520-240-23: Battery  disconnected. Electrical  power  off. Hydraulic  power  off. Controls closet panel closed. Controls closet blanket installed. Left and right electrical compartment access doors closed. Engine access covers closed. Engine work platforms closed. GO TO NEXT PAGE 4-122 Change 12