TM 1-1510-225-CL
E–7
ENGINE
BLEED
AIR
SYSTEM
MALFUNCTION
L or R BL AIR FAIL ANNUNCIATOR
ILLUMINATED
1. BRAKE DEICE switch – OFF.
2. ITT and TORQUE – Monitor (note readings).
3. BLEED AIR VALVE switch – OFF.
4. Cabin pressurization – Check.
EXCESSIVE DIFFERENTIAL PRESSURE
1. Cabin pressurization controller – Select higher
setting.
IF CONDITION PERSISTS:
2. Oxygen (crew and passengers) – As required.
3. LEFT BLEED AIR VALVE switch – ENVIR OFF.
IF CONDITION STILL PERSISTS:
4. RIGHT BLEED AIR VALVE switch – ENVIR OFF.
5. Descend – As required.
IF CONDITION STILL PERSISTS:
6. Oxygen masks – 100% and on.
7. CABIN PRESS switch – DUMP.
8. BLEED AIR VALVE switches – OPEN (if cabin
heating is required).
LOSS OF PRESSURIZATION (ABOVE 10,000
FEET)
1. Crew Oxygen Masks – 100% and on.
