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If a leak is suspected, the crew should action the “FUEL LEAK” abnormal checklist available in QRH:
? If the leak is positively identified as coming from the engine, the affected engine is shut down to isolate the fuel leak and fuel cross-feed valve(s) may be used as required.
? If the leak is not from the engines or cannot be located, it is imperative that the cross-feed valve(s) is (are) not opened.
 
ABNORMAL OPERATIONS
FUEL
 

 
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ABNORMAL OPERATIONS
HYDRAULIC
 
HYDRAULIC GENERATION PARTICULARITIES
Applicable to: ALL
PREFACE
The hydraulic generation may come from:
? The engine driven pumps
? The RAT
? The electrical pumps
? The hand pump
RAT and electrical pumps have some particularities that need to be highlighted. RAT
The RAT may be extended manually by pressing the RAT MAN ON pushbutton or may deploy automatically.
The RAT is designed to supply flight controls and the Emergency Generator e.g. in all engines flame out case. It can cover high transient demand from flight controls.
The RAT deploys automatically in the event of:
? An all engines flame out
? In some cases of dual hydraulic LO LVL (Refer to FCOM/DSC-29-10-20 RAM AIR TURBINE (RAT))
The dual hydraulic LO LVL signal is used for the RAT automatic deployment logics. The purpose of these logics is to cover the case of an engine burst affecting several hydraulic lines. It should be noted that, even in case of the green hydraulic circuit LO LVL, the RAT could pressurize the green hydraulic circuit.
The RAT flow varies between 15 % and 45 % of an engine driven pump flow capability according to the aircraft speed.
RAT must not be used in case of green hydraulic overheat.
At low speed, the RAT stalls. Some anticipation is required from the crew to carry out a safe landing.
ELECTRICAL PUMPS
These electrical pumps are not designed to replace the Engine Driven Pump to supply flight controls, as they are power limited (the hydraulic electric pump flow represents 18 % of an engine driven pump flow) and they cannot cover high transient demand from flight controls. Furthermore, if they were used in case of dual hydraulic failure, they could degrade the aircraft handling (Flight Control jerk).
As a general rule, do not manually select a HYD ELEC PUMP ON, except temporarily, to retract the spoilers if they remain out after a hydraulic failure.
 
ABNORMAL OPERATIONS
HYDRAULIC
 
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:
　
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