TM 1-1520-238-23
4-432
4.137.
ENGINE TURBINE SPEED CONTROL UNIT ADJUSTMENT (T700-GE-701C ENGINE) – continued
NOTE
To increase NP speed, turn NP adjust-
ment screw clockwise. To decrease
NP speed, turn NP adjustment screw
counterclockwise.
The engine 101% RPM can be
checked by monitoring the Main Rotor
Indicator for illumination or flickering
illumination of the 102% light segment.
Step e is used to confirm available
RPM will illuminate the 100% NR and
NP segments fully and may cause the
102% segments to flicker illuminate or
illuminate fully.
e. Slowly adjust NP adjustment screw (2) on con-
trol unit (3) until ENG RTR indicator flickers at
102% NP .
NOTE
Step f checks the ability of the engine
turbine speed control unit to reduce en-
gine RPM (NP).
f. Slowly adjust screw (2) on control unit (3) un-
til ENG RTR indicator 98% NP light extin-
guishes.
g. Slowly adjust screw (2) on control unit (3) un-
til ENG RTR indicator flickers at 102% NP .
h. Adjust screw (2) on control unit (3) an addi-
tional 1/8th turn in clockwise direction.
i. Hold screw (2). Tighten nut (1).
j. Lockwire nut (1) to control unit (3). Use wire
(item 222, App F).
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