ABNORMAL
PROCEDURES
AIRPLANE
OPERATIONS
MANUAL
1-03-57
Page
4
Code
03 REVISION 40
AOM-145/1114
CONTINUED FROM PREVIOUS PAGE
Above 15000 ft:
Anti-icing system performance decreases.
If it is not possible to descend below 15000 ft, failure messages
may be presented. In this case, exit icing conditions and refer to the
appropriate approach and landing procedure.
Below 15000 ft:
If an anti-icing system failure message is presented, refer to the
Associated System Anti-Icing Procedure.
In flight, the air conditioning pack valves will close automatically when:
For AE3007A or AE3007A1/1 engines Pre-Mod. SB 145-73-
0010: below 15000 ft, TAT above -18°C and the remaining
engine at T/O-1 or CON mode.
For AE3007A1 engines and AE3007A or AE3007A1/1 engines
Post-Mod. SB 145-73-0010: below 9700 ft, TAT above 19°C at
sea level, decreasing linearly to -5°C at 9700 ft and the
remaining engine is at T/O-1 mode.
For AE3007A1P or AE3007A1/3 engines: below 9700 ft, TAT
above 19°C at sea level, decreasing linearly to -5°C at 9700 ft
and the remaining engine is at T/O or T/O RSV mode.
ANTI-ICING LOW CAPACITY
EICAS WARNING: ICE COND-A/I INOP
EICAS CAUTION: A/ICE LOW CAPACITY
LIGHT: Master Warning and Master Caution
Thrust Lever .................................................................. ADVANCE
Advance Thrust Lever to at least 55% N1 and wait for 5 seconds.
If Thrust Lever advance required to clear the message exceeds
55% N1, report to the maintenance personnel.
If the message still persists, Wing and/or Stabilizer Anti-Icing Failure
messages may be presented, then:
Associated System Anti-Icing Failure Procedure..... PERFORM
ENGINE ANTI-ICING OVERPRESSURE
EICAS ADVISORY: ENG A/ICE OVERPRES
Crew awareness.
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