A318/A319/A320/A321 机组训练手册 FCTM Flight Crew Training Manual(145)_航空信息_民用航空_通用航空

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DUAL HYDRAULIC FAILURES
Applicable to: ALL
PREFACE
Single hydraulic failures have very little effect on the handling of the aircraft but will cause a degradation of the landing capability to CAT 3 Single.
Dual hydraulic failures however, although unlikely, are significant due to the following consequences:
? Loss of AP
? Flight control law degradation (ALTN)
? Landing in abnormal configuration
? Extensive ECAM procedures with associated workload and task-sharing considerations
? Significant considerations for approach and landing.

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

GENERAL GUIDELINES
It is important to note that the AP will not be available to the crew but both FD and A/THR still remain. Additionally, depending on the affected hydraulic circuits, aircraft handling characteristics may be different due to the loss of some control surfaces. The PF will maneuver with care to avoid high hydraulic demand on the remaining systems.
The PF will be very busy flying the aircraft and handling the communications with the flight controls in Alternate Law.
A double hydraulic failure is an emergency situation, with red LAND ASAP displayed, and a MAYDAY should be declared to ATC. A landing must be carried out as soon as possible bearing in mind, however, that the ECAM actions should be completed prior the approach.
PF will then require the ECAM actions. A clear reading of STATUS is essential to assess the aircraft status and properly sequence actions during the approach.
This failure is called a "complex procedure" and the QRH summary should be referred to upon completion of the ECAM procedure. Refer to OP-040 USE OF SUMMARIES
While there is no need to remember the following details, an understanding of the structure of the
hydraulic and flight control systems would be an advantage. The F/CTL SD page and the OPS DATA section of the QRH provide an overview of the flight controls affected by the loss of hydraulic systems.
The briefing will concentrate on safety issues since this will be a hand-flown approach with certain handling restrictions:
? Use of the selected speeds on the FCU.
? Landing gear gravity extension
? Approach configuration and flap lever position
? Approach speed VAPP
? Tail strike awareness
? Braking and steering considerations
? Go around call out, aircraft configuration and speed
The STATUS page requires, in each case, a landing gear gravity extension. The LANDING GEAR GRAVITY EXTENSION procedure will be completed with reference to the QRH.
A stabilized approach will be preferred.
REMAINING SYSTEMS
Criteria: SA
1 Applicable to: MSN 0045-1718