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
