MD-11 Flight Crew Operations Manual
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Air Chapter Air
Alerts Section 40
Air.40.1
Air.40 Air-Alerts
NOTE: The associated cue switch is shown in parenthesis (XXX)
following the alert.
Red Boxed Alerts (Level 3)
AIR MANF 1/2/3 FAIL (AIR) - Leak has occurred in respective air system
manifold or left wing anti-ice ducting (1)/tail anti-ice ducting (2)/right
wing anti-ice ducting (3).
BLD AIR1/2/3 TEMP HI (AIR) - Respective bleed air system exceeds
temperature limit.
CABIN ALTITUDE (AIR) - Cabin altitude exceeds 10,000 feet.
CAC MANF FAIL (AIR) - Leak has occurred in pneumatic system ducts in
the center accessory compartment.
Amber Boxed Alerts (Level 2)
AIR ALERTS (AIR) - DEUs not receiving valid data from air system
controllers. Air system warning and alert faulty.
AIR SYS 1/2/3 PRES LO (AIR) - Respective air system pressure is low.
AIR SYS 1-2 OFF (AIR) - A manifold failure has caused air systems 1 and 2
to shut down and air system is in manual mode.
AVNCS AIR FLO OFF (AIR) - All avionics fans are inoperative and there is
no avionics compartment cooling flow.
AVNCS COMPT OVHT (AIR) - Avionics compartment temperature is high.
AVNCS EXH FLO OFF (AIR) - Avionics compartment exhaust flow is low.
BLEED AIR 1/2/3 FAULT (AIR) - Respective system bleed air temperature
or pressure is low.
TRIM AIR OFF (AIR) - The air conditioning TRIM AIR has been
automatically turned off (a fault exists) or the TRIM AIR switch has been
manually selected off.
Amber Alerts (Level 1)
AIR LRU INOP (MAINT) - Maintenance alert. Maintenance action has been
taken to declare an air conditioning pack, pneumatic system, or manifold
sensor inoperative. The system can be operated in the auto mode and will
not use the affected component.
October 02, 2006
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