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• bright white or orange glow appearing in the engine inlets,
• sharp, distinct beams from the landing lights,
• multiple engine malfunctions, such as rising EGT, decreasing power, stall, or flame out.
If the aircraft enters a volcanic ash cloud :
ESCAPE MANEUVER (terrain permitting)........................................................................ INITIATE
Because the lateral dimensions of ash cloud are not known, the pilot should if possible turn
180 °.
ATC....................................................................................................................................NOTIFY
A/THR......................................................................................................................................OFF
This will prevent thrust variations.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - OPERATIONS ON
AIRPORTS COVERED WITH ASH, SAND OR DUST
A318/A319/A320/A321 FLEET PRO-SUP-91-40 P 4/6
FCOM 19 AUG 10
THRUST (terrain permitting).........................................................................................DECREASE
This helps to maintain the engine stall margin by reducing the amount of ash ingestion and
limiting the EGT. It also holds the accumulation of molten volcanic ash on turbine vanes to a
minimum. Do not climb, since this increases EGT.
CREW OXYGEN............................................................................................................. ON/100 %
CABIN CREW..................................................................................................................... NOTIFY
PASSENGER OXYGEN.................................................................................................. AS RQRD
Depending on contamination.
ENG ANTI ICE............................................................................................................................ON
WING ANTI ICE..........................................................................................................................ON
PACK FLOW...............................................................................................................................HI
Maximum airbleed gives the engines additional stall margin.
Note: If the aircraft has a cargo ventilation system, switch off the CARGO ISOL valves to
prevent a cargo smoke warning from being triggered.
APU (if available)..................................................................................................................START
This prepares the aircraft for a starter-assisted engine relight.
ENGINE PARAMETERS.................................................................................................MONITOR
Monitor the EGT carefully to see that it does not go over its limit.
Note: To prevent the engines from exceeding EGT limits it may become necessary to use a
precautionary engine shut-down.
• Restart when clear of the volcanic ash cloud.
• Upon restart, the engine may accelerate very slowly. Do not misinterpret this as a
failure to start.
• Consider that the compressor and turbine blades have been eroded and avoid
sudden changes in thrust. Fuel flow and EGT may increase.
AIRSPEED INDICATIONS.............................................................................................. MONITOR
Volcanic ash may clog the pitot probes. If the airspeed indication is lost or becomes unreliable,
Refer to STLO-ABN-34 UNRELIABLE SPEED INDIC / ADR CHECK PROC.
Note: Electrostatic conditions may cause communication problems.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
ADVERSE WEATHER - OPERATIONS ON
AIRPORTS COVERED WITH ASH, SAND OR DUST
A318/A319/A320/A321 FLEET PRO-SUP-91-40 P 5/6
FCOM 19 AUG 10
REPORTING
• Whenever operating in areas affected by volcanic activity, flight crews should be aware of
volcanic reporting procedures and be familiar with the use of the ICAO Special Air Report of
Volcanic Activity (Model VAR).
• If the aircraft encounters a volcanic ash cloud, the flight crew should report the location, altitude,
and direction of drift for the ash cloud to ATC, flight conditions and crew duties permitting.
FLIGHT OPERATIONS WITH VOLCANIC ASH
Applicable to: ,
, MSN,,
Avoid flight into areas of known volcanic activity.
If a volcanic eruption is reported while the aircraft is in flight, reroute the flight to remain well clear
of the affected area (volcanic dust may spread over several hundred miles). If possible, stay on the
upwind side of the volcano (at least 20 nm upwind of it if it is erupting).
In hours of darkness or in meteorological conditions that obscure volcanic dust, one or several of the
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 14(120)
