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CRUISE
The flight crew must avoid flying into areas of known volcanic ash. If a volcanic eruption is reported, while the aircraft is in flight, the flight must be rerouted to remain clear of the affected area. The volcanic dust may spread over several hundred miles. Whenever possible, the flight crew should stay on the upwind side of the volcano.
Depending on outside conditions (night flight, clouds), volcanic dust might not be visible.
However, several phenomena can indicate that the aircraft is flying through ash cloud, for example:
? Smoke or dust in the cockpit
? Acrid odour similar to electrical smoke
? Engine malfunction, e.g. a rising EGT
? At night, the appearance of St Elmo fire, bright white or orange glow appearing in engine inlets or sharp and distinct beams from the landing lights.
If an ash cloud is encountered, the applicable procedure is described in the QRH. The essential actions to be taken are:
? 180 ° turn if possible. This is the quickest way to escape, because the ash cloud lateral dimension is not known
? Protecting the engines: ‐ Set A/THR to OFF ‐ Decrease engines thrust if possible and maximize engine bleed to increase the engine surge
margin
‐ Start the APU for further engine restart, if required
 

  SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

? Protecting the flight crew and passengers:
‐ Don the oxygen mask
‐ Consider oxygen for the passengers.
? Monitoring the flight parameters:
‐ Monitor the EGT and fuel flow, because an engine part may be eroded
‐ Monitor and cross-check the IAS because an IAS indication may be corrupted
A diversion to the nearest appropriate airport should be considered. LANDING
The use of reverse should be avoided, unless necessary.
 

  SUPPLEMENTARY INFORMATION
ADVERSE WEATHER
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

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  SUPPLEMENTARY INFORMATION
FLYING REFERENCE
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

GENERAL
Applicable to: ALL
Two flying references may be used on the PFD:
? The attitude
? The Flight Path Vector (FPV), called the "bird".
The pilot selects the flight reference with the HDG/VS TRK/FPA p/b on the FCU.
THE ATTITUDE
Applicable to: ALL
When HDG/VS is selected on the FCU, "bird" is off, and the attitude is the flight reference with HDG and VS as basic guidance parameters.
The attitude flight reference should be used for dynamic manoeuvres, for example, take-off or go-around. An action on the sidestick has an immediate effect on the aircraft attitude. The flight crew can monitor this flight reference directly and accurately during these maneuvers.
　
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本文鏈接地址：A318/A319/A320/A321 機組訓練手冊 FCTM Flight Crew Training Manual(171)