TM 55-1510-222-10
conditions of the landing site. If gear-up, follow gear-up
landing procedure. If gear-down, make a normal
touchdown and use brakes as required.
9-17. LOW OIL PRESSURE.
In the event of a low oil pressure indication, perform
procedures as applicable:
1.
Oil pressure below 90 PSI and above 60
PSI: Torque As required (59% maximum).
2.
Oil pressure below 60 PSI: Perform engine
shutdown, or land as soon as practicable using
minimum power to ensure safe arrival.
9-18. CHIP DETECTOR WARNING ANNUNCIATOR
ILLUMINATED.
If the L CHIP DET or R CHIP DET warning annunciator
illuminates, and safe single engine flight can be
maintained.
1.
Perform engine shutdown.
2.
Land as soon as practicable.
9-19.
DUCT
OVERTEMPERATURE
CAUTION
ANNUNCIATOR ILLUMINATED.
Ensure
the
cabin
floor
outlets
are
open
and
unobstructed, then perform the following steps in
sequence until the annunciator is extinguished. Allow
approximately 30 seconds after each adjustment for the
system temperature to stabilize. The overtemperature
condition is considered corrected at any point during the
procedure that the annunciator extinguishes.
1.
Cabin air control In.
2.
Cabin air mode switch AUTO.
3.
Cabin temperature switch Decrease.
4.
Vent blower switch HIGH.
5.
Cabin air mode switch MAN COOL.
6.
Manual temperature switch DECREASE
(hold).
7.
Left bleed air valve switch PNEU ONLY.
8.
Light still illuminated after 30 seconds: Left
bleed air valve switch ON.
9.
Right bleed air valve switch PNEU ONLY.
Light still illuminated after 30 seconds: Right bleed air
valve switch ON.
NOTE
If the overtemperature annunciator
has
not
extinguished
after
completing the above procedure, the
warning system has malfunctioned.
9-20. ENGINE ANTI-ICE FAILURE.
Ice vane failure is indicated by VANE FAIL caution
annunciator illumination. If the ice vanes fail to operate,
perform the following:
1.
Ice vane power select switch STBY.
2.
Ice
vane
fail
annunciator
Check
extinguished.
9-21. ENGINE BLEED AIR SYSTEM MALFUNCTION.
a.
Bleed Air Failure Annunciator Illuminated.
Steady illumination of the warning annunciator in flight
indicates a possible ruptured bleed air line aft of the
engine firewall. The annunciator will remain illuminated
for the remainder of flight. Perform the following:
NOTE
BLEED AIR FAIL annunciators may
momentarily
illuminate
during
simultaneous
surface
deice
and
brake deice operation at low N.
speed.
1.
Brake deice switch Off.
2.
TGT and torque Monitor (note readings).
3.
Bleed air valve switch Off.
NOTE
Brake deice on the affected side will
not be available with bleed air valve
switch off.
4.
Cabin pressurization Check.
b.
Excessive Differential Pressure. If cabin
differential pressure exceeds 6.5 PSI, perform the
following:
1.
Cabin altitude and rate-of-climb controller
Select higher setting.
If condition persists:
2.
Left bleed air valve switch PNEU ONLY
(annunciator illuminated).
If condition still persists:
3.
Right bleed air valve switch PNEU ONLY
(annunciator illuminated).
If condition still persists:
9-7
