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abradable seals.
2. High N1 vibrations are generally accompanied by perceivable airframe vibrations.
High N2 vibrations can occur without perceivable airframe vibrations.
�� IF NO ICING CONDITIONS EXIST:
ENG PARAMETERS......................................................................................................... CHECK
Check engine parameters and especially EGT, crosscheck with other engine.
Report in maintenance logbook.
�� If rapid increase above the advisory:
THRUST LEVER (affected engine).......................................................................... RETARD
Flight conditions permitting, reduce N1 to maintain vibration level below advisory threshold.
Note: If the VIB indication does not decrease following thrust reduction, this may
indicate other problems on the engine. Apply adequate procedure.
�� IF ICING CONDITIONS EXIST:
An increase of N1 vibration in icing conditions with or without engine anti-ice may be due to fan
blades and/or spinner icing.
A/THR....................................................................................................................................OFF
ENG ANTI ICE.................................................................................................................. CHECK
If ENG ANTI ICE is off, switch it ON at idle fan speed, one engine after the other with
approximately 30 s interval.
THRUST LEVER (one engine at a time).....................................................INCREASE THRUST
Increase thrust with power setting compatible with the flight phase. Vibration level will come
back to normal after ice shedding despite a slight increase during acceleration. Resume normal
operation.
Note: If possible, shut the engine down after landing, for taxiing, when vibrations above the
advisory level have been experienced during the flight.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
POWERPLANT
A330/A340 FLEET PRO-ABN-70 P 135/196
FCOM 19 AUG 10
HIGH ENGINE VIBRATION
Applicable to: ,
The vibration advisory on ECAM (N1 greater than 3.3 units, N2 greater than 2.6 units, N3 greater
than 4.0 units) is mainly a guideline to induce the crew to monitor engine parameters more closely.
Vibration detection alone does not require engine shutdown.
Note: 1. High engine vibrations may be accompanied by cockpit and cabin smoke and/or the
smell of burning. This may be due only to compressor blade tip contact with associated
abradable seals.
2. High N1 vibrations are generally accompanied by perceivable airframe vibrations.
High N2, N3 vibrations can occur without perceivable airframe vibrations.
�� IF NO ICING CONDITIONS EXIST:
ENG PARAMETERS......................................................................................................... CHECK
Check engine parameters and especially EGT, crosscheck with other engine.
Report in maintenance logbook.
�� If rapid increase above the advisory:
THRUST LEVER (affected engine).......................................................................... RETARD
Flight conditions permitting, reduce N1 to maintain vibration level below advisory threshold.
Note: If the VIB indication does not decrease following thrust reduction, this may
indicate other problems on the engine. Apply adequate procedure.
�� IF ICING CONDITIONS EXIST:
An increase of N1 vibration in icing conditions with or without engine anti-ice may be due to fan
blades and/or spinner icing.
A/THR....................................................................................................................................OFF
ENG ANTI ICE.................................................................................................................. CHECK
If ENG ANTI ICE is off, switch it ON at idle fan speed, one engine after the other with
approximately 30 s interval.
THRUST LEVER (one engine at a time).....................................................INCREASE THRUST
Increase thrust with power setting compatible with the flight phase. Vibration level will come
back to normal after ice shedding despite a slight increase during acceleration. Resume normal
operation.
Note: If possible, shut the engine down after landing, for taxiing, when vibrations above the
advisory level have been experienced during the flight.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
POWERPLANT
A330/A340 FLEET PRO-ABN-70 P 136/196
FCOM 19 AUG 10
ENG 1(2)(3)(4) THR LEVER ABV IDLE
Applicable to:
L2 This alert is triggered at landing when one thrust lever is above idle while the thrust reverser is
selected on one of the other engines.
　
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