A318/A319/A320/A321 机组训练手册 FCTM Flight Crew Training Manual(138)

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Below 100 kt, the DC BAT BUS is automatically connected and below 50 kt, the AC ESS BUS is shed.
TECHNICAL BACKGROUND
Criteria: K2113, K3154, SA
2 Applicable to: MSN 1668-4078
The emergency electrical configuration is due to the loss of AC BUS 1 and 2. The RAT extends automatically. This powers the blue hydraulic circuit which drives the emergency generator. The emergency generator supplies both AC and DC ESS BUS.
Below 125 kt, the RAT stalls and the emergency generator is no longer powered. The emergency generation network is automatically transferred to the batteries and AC SHED ESS and DC SHED ESS BUS are shed.
Below 100 kt, the DC BAT BUS is automatically connected and below 50 kt, the AC ESS BUS is shed.
GENERAL GUIDELINES
Criteria: SA
3 Applicable to: MSN 0045-0499
As only PFD1 is available, the left hand seat pilot becomes PF. Once a safe flight path is established, and the aircraft is under control, ECAM actions will be carried out.
This is a serious emergency and ATC should be notified using appropriate phraseology ("MAYDAY"). Although the ECAM displays LAND ASAP in red, it would be unwise to attempt an approach at a
 

  ABNORMAL OPERATIONS
ELECTRICAL
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

poorly equipped airfield in marginal weather. However, prolonged flight in this configuration is not recommended.
AP/FD and ATHR are lost. The flight is to be completed manually in alternate and then, when gear down, in direct law. Crews should be aware that workload is immediately greatly increased.
As only the EWD is available, disciplined use of the ECAM Control Panel (ECP) is essential, (Refer to OP-040 ECAM HANDLING).
In case of simultaneous engine generator, the probability of a successful APU gen coupling is low. Therefore, APU start attempts should be avoided as this will significantly reduce the flight time on batteries (about 3.5 min for one start attempt).
A clear reading of STATUS is essential to assess the aircraft status and properly sequence actions during the approach.
The handling of this failure is referred to as a "complex procedure". A summary for handling the procedure is included in the QRH, which will be referred to upon completion of the ECAM procedure. The ELEC EMER CONFIG SYS REMAINING list is available in QRH.
When landing gear is down, flight time is limited to 22 min as batteries are the only remaining electrical source and flight control law reverts to direct law. Additionally, some convenient loads are lost e.g. FAC for characteristic speed or FMGC1 for ILS tuning. It is the reason why:
? Landing gear extension will be delayed until reaching 1 000 ft
? Navaids tuning on RMP1 will be anticipated.
The BSCU are lost. Consequently, the NWS and anti skid are lost. Alternate braking with yellow hydraulic pressure modulation up to 1 000 PSI will be used. Additionally, reversers are not available. RA 1+2 are lost with their associated call out. Call out will be made by PNF.
　
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