MD-11 Flight Crew Operations Manual
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Air -
Alerts
Air.40.3
ECON OFF (AIR) - The ECON switch has been selected off. The packs
command maximum available flow and the cabin recirculation fans will
not operate.
LDG ALTITUDE MAN (AIR) - The landing field elevation is set by turning
the MANUAL LDG ALT knob on the CABIN PRESS control panel.
Selecting the cabin pressure controller to manual and back to auto
restores automatic operation.
LWR CARGO TEMP LO (AIR) - Temperature in one or both lower cargo
compartments is below limit.
OPEN OUTFLOW VALVE (AIR) - Cabin pressure exceeds allowable limits
to open doors while aircraft is on the ground.
PACK 1/2/3 FLO DISAG (AIR) - Associated air conditioning pack flow is in
disagreement with the commanded position.
PACK 1/2/3 OFF (AIR) - Associated air conditioning pack is off, either
selected manually by the crew, or automatically by the ESC due to a fault
or configuration requirement.
PACKS NOT OFF (AIR) - During packs off (bleeds on) takeoff, one or more
packs are not off.
PAX AIR FLO LO (AIR) - The cabin air inflow from the air conditioning
packs is below desired limit based on the number of passengers. This
alert is only displayed in flight, and only if all packs are operating.
SEL AIR SYS MAN (AIR) - The air system has reverted to manual mode but
the AIR SYSTEM SELECT switch is in the auto position.
SEL (FWD or AFT) TEMP OFF - temperature in the respective lower cargo
compartment exceeds limits. When the associated cargo temperature
returns to normal one attemp may be made to restore the system.
SEL CAB PRES MAN (AIR) - The automatic cabin pressurization system is
inoperative.
SET LDG ALTITUDE (AIR) - The cabin pressure controller is not receiving
landing field elevation data from the FMS and should be set manually.
Automatic operation may be restored by selecting the cabin pressure
controller to manual and back to auto.
SEL PACK 1/2/3 OFF (AIR) - Respective pack discharge temperature
exceeds limits.
ZONE TEMP SEL OFF (AIR) - One or more of the cabin zone temperature
selectors is selected off.
October 02, 2006
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