TM 1-1520-240-MTF
2-62
B BEFORE HOVER (CONT.)
(4) Pilot’s No. 1 INC/DEC switch check for
proper operation with momentary
decrease then increase checking N1,
PTIT, torque, and RRPM response.
(5) Copilot’s No. 1 INC/DEC switch — DEC
and hold. Check that RRPM stabilizes
at 97% (+1%, -2%). If RRPM continues
to decrease below 97%, return RRPM
to 100% by holding the switch in the INC
position and releasing it at 100%
RRPM. Corrective maintenance action
is required.
(6) Copilot’s FADEC No. 1 INC/DEC switch
— INC Incrementally until RRPM no
longer increases. Check that RRPM
stabilizes at 103% (+2%, -1%). If RRPM
continues to increase, return RRPM to
100% with the Copilots FADEC No. 1
INC/DEC
switch.
Corrective
maintenance action is required.
(7) Copilot’s beep No. 1 INC/DEC switch
DEC as necessary to obtain 100%
RRPM.
(8) Thrust Cont lever — Increase to
maximum possible without lifting off the
ground. Check that RRPM stabilizes at
100% 2%.
(9) Thrust Control Lever — Reduce to
Ground Detent.
(10) FADEC No. 1 switch — PRI.
(11) ENG No. 2 ECL — FLT.
(12) Repeat steps (1) through (10) with other
engine.
