TM 55-1510-215-10
18. Surface deice systems Check by
(1)
activating the deice switch to SGL and visually check
CAUTION
inflation and deflation of boots and DE-ICING pressure.
Repeat procedure for MNL switch position.
To prevent damage to reversing
NOTE
linkage do not force power levers to
full REVERSE with test switch ON.
The deicing system should be
actuated on a daily basis to insure
13. Secondary idle stop Check. Check
H
system function and to exercise the
with condition levers HIGH IDLE and power levers at
system distributor valve.
IDLE, then while holding the secondary idle stop test
switches down, move power levers slowly toward
19. Inlet air separator system Check as
H
REVERSE in one continuous movement, while
follows at 70% N1:
observing that the PRIMARY LOW pitch lights illuminate
and an ARPM RISE of 170 to 250 is obtained. Release
(1) Inlet air separator switch AUTO.
the test switch and RPM should increase. Return power
Observe the following:
levers to normal idle position and cancel lights in
annunciator panel by actuating secondary flight idle
(a) Torque should decrease on both
switch if they remain illuminated.
engines.
14. Instrument suction Check (4.5 to 5.2 in
(b) ITT should increase on both
Hg).
engines.
15. Pneumatic pressure Check (12 to 20
(c) MASTER CAUTION lights will
PSI).
flash, and the PARTICLE SEPARATOR light will
illuminate.
16. Volt-loadmeters Check bus voltage
BETWEEN 26.5 AND 29.5 VOLTS, and load paralleling
(2) Inlet air separator switch OFF.
within one increment and a maximum of 0.5 on the
Monitor for deactivation of both left and right systems.
loadmeter scale. Note any discrepancy on DA Form
The torque and ITT should return to initial values, the
2408-13.
PARTICLE SEPARATOR light should extinguish, and
the MASTER CAUTION lights should stop flashing after
17. Propeller deice system Check. Move
(I)
reset.
the switch to PROP position and check propeller
ammeter normal operation (14-18 amperes) for 2.5
20. Condition levers LO IDLE.
needle may or may not be detectable during cycle
21. Deleted.
H
switching.
Page 8-15 Deleted.
H U.S. GOVERNMENT PRINTING OFFICE: 1994-555-121/80069
8-14 Change 10
