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Flight conditions at time of gravity feeding Gravity feed ceiling
Flight time above FL 300 more than 30 min
(Fuel deaerated)
Current FL(1)
Flight time above FL 300 less than 30 min
(Fuel non-deaerated)
FL 300(1)
Aircraft flight level never exceeded FL 300
(Fuel non-deaerated)
FL 150(1), or 7 000 ft above takeoff airport, whichever is higher
(1) For JET B, gravity feed ceiling is FL 100 in all cases.
DESCEND TO GRVTY FEED CEILING (if applicable).
�� WHEN REACHING GRVTY FEED CEILING:
FUEL X
FEED...............................................................................................................................
... OFF
�� IF NO FUEL LEAK AND FOR AIRCRAFT HANDLING:
If no fuel leak, and for flight with only one engine running (this engine being fed by
gravity), apply the
following :
FUEL X
FEED...............................................................................................................................
.....ON
BANK ANGLE.........................................................................1° WING DOWN ON
LIVE ENGINE SIDE
RUDDER
TRIM................................................................................................................................
USE
�� WHEN FUEL IMBALANCE REACHES 1 000 kg (2 200 lb):
BANK ANGLE......................................................................2° or 3° WING DOWN
ON LIVE ENG SIDE
ABN-28
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AQU3I1CK8 R/AEF3E1RE9N/ACE3 H2A0ND/A B3O2OK1
ABNORMAL AND
EMERGENCY PROCEDURES 30 AUG 10
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A318/A319/A320/A321 FLEET , , , , , , , ,
, , , , MSN
ABN-28
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AQU3I1CK8 R/AEF3E1RE9N/ACE3 H2A0ND/A B3O2OK1
ABNORMAL AND
EMERGENCY PROCEDURES 30 AUG 10
A318/A319/A320/A321 FLEET MSN
FUEL IMBALANCE
FOB.................................................................................................................................
...................CHECK
Compare the FOB + FU, with the FOB at departure.
If the difference is significant, or if the FOB + FU decreases, suspect a fuel leak.
CAUTION A fuel imbalance may indicate a fuel leak.
Do not apply this procedure, if a fuel leak is suspected.
Refer to ABN-28 FUEL LEAK.
FUEL X
FEED...............................................................................................................................
............ON
CTR TK L+R
XFR.................................................................................................................................
..OFF
�� On the lighter side:
FUEL
PUMPS............................................................................................................................
.......OFF
�� When fuel is balanced:
FUEL
PUMPS............................................................................................................................
.........ON
CTR TK L+R
XFR..............................................................................................................................O
N FUEL X
FEED...............................................................................................................................
... OFF
GRVTY FUEL FEEDING
ENG MODE
SEL..................................................................................................................................
... IGN
AVOID NEGATIVE G FACTOR
�� DETERMINE GRAVITY FEED CEILING:
Consult the following table to determine the flight altitude limitation.
Flight conditions at time of gravity feeding Gravity feed ceiling
Flight time above FL 300 more than 30 min
(Fuel deaerated)
Current FL(1)
Flight time above FL 300 less than 30 min
(Fuel non-deaerated)
FL 300(1)
Aircraft flight level never exceeded FL 300
(Fuel non-deaerated)
FL 150(1), or 7 000 ft above takeoff airport, whichever is higher
(1) For JET B, gravity feed ceiling is FL 100 in all cases.
DESCEND TO GRVTY FEED CEILING (if applicable).
�� WHEN REACHING GRVTY FEED CEILING:
FUEL X
FEED...............................................................................................................................
... OFF
�� IF NO FUEL LEAK AND FOR AIRCRAFT HANDLING:
If no fuel leak, and for flight with only one engine running (this engine being fed by
gravity), apply the
following :
FUEL X
FEED...............................................................................................................................
.....ON
BANK ANGLE.........................................................................1° WING DOWN ON
　
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