TM 1-1510-262-10
9-20. ENGINE ANTI-ICE FAILURE.
Ice vane failure is indicated by the illumination of the amber #1 or #2 VANE FAIL caution annunciator lights. If the
ice vanes fail to operate, perform the following:
! ICE VANE POWER SELECT switch -- STBY.
2. VANE FAIL annunciator -- Check extinguished.
9-21. ENGINE BLEED AIR SYSTEM MALFUNCTION.
a. BL AIR FAIL Annunciator Illuminated. Steady illumination of the warning annunciator in light indicates
possible ruptured bleed airline aft of the engine irewall. The annunciator will remain illuminated for the remainder
of light. Perform the following:
NOTE
AIR FAIL annunciators may momentarily illuminate during simultaneous surface deice and brake
deice operation at low N 1 speed.
! BRAKE deice switch -- OFF.
@ ENVIRO & PNEU BLEED AIR valve switch (affected side) -- OFF.
NOTE
Brake deice on the affected side will not be available with bleed air valve switch off.
# Cabin pressurization -- Check.
b. Excessive Differential Pressure. If cabin differential pressure exceeds 6.5 PSI, perform the following:
! Cabin altitude and rate-of-climb controller -- Select higher setting.
If
condition persists:
@ LEFT ENVIRO & PNEU BLEED AIR valve switch -- PNEU ONLY (L BL AIR OFF annunciator
illuminated).
If
condition still persists:
# RIGHT ENVIRO & PNEU BLEED AIR valve switch -- PNEU ONLY (R BL AIR OFF annunciator
illuminated).
If
condition still persists:
4. Descend immediately.
If
unable to descend:
5. Oxygen masks -- 100% and ON.
^ CABIN PRESS switch -- DUMP.
& ENVIRO & PNEU BLEED AIR valve switches -- ON (if cabin heating is required).
9-22. LOSS OF PRESSURIZATION (ABOVE 10,000 FEET).
If cabin pressurization is lost when operating above 10,000 feet or the ALT WARN warning annunciator illuminates,
perform the following:
1. Crew oxygen masks -- 100% and ON.
2. Descend as required.
NOTE
Proper ESIS/PFD/MFD operation has been demonstrated at cabin altitudes of up to12,500 feet.
9-23. CABIN DOOR CAUTION ANNUNCIATOR ILLUMINATED.
Remain clear of cabin door and perform the following:
! ENVIRO & PNEU BLEED AIR valve switches -- PNEU ONLY.
Change 1
9-10