STANDBY HYDRAULIC LOW PRESSURE • Hydraulics

NNC

ConditionCondition

Pression pompe Standby < 1 300 PSI — LOW PRESSUREStandby pump output pressure < 1,300 PSI — LOW PRESSURE

ObjectifObjective

Confirmer LOW PRESSURE STBY seulement pompe activée — croiser quantité et besoin rudder/TR.Confirm STBY LOW PRESSURE only when pump activated — crosscheck quantity and rudder/TR need.

LOW PRESSURESTANDBY

SeuilThreshold< 1,300 PSI Armement LPLP armingSeulement pompe activéeOnly when pump activated MEL29-12 (voyant/capteur)(light/sensor) RefroidissementCoolingram-air duct

On GND

MEL 29-12 [Standby System Low Pressure Light] = voyant + capteur. Impossible de dispatcher sans le système Standby (pompe inop ou qty basse).MEL 29-12 [Standby System Low Pressure Light] = light + sensor. Cannot dispatch without the Standby system (inop pump or low qty).

LOW PRESSURE armé seulement quand la pompe STBY est activée. EMDP STBY refroidi par air dynamique (duct).LOW PRESSURE armed only when STBY pump operation is activated. STBY EMDP air-cooled by ram air through a cooling duct.

Activation manuelleManual activation

System A Flight Control → STBY RUDSystem A Flight Control → STBY RUD
System B Flight Control → STBY RUDSystem B Flight Control → STBY RUD
Alternate Flaps Master → ARMAlternate Flaps Master → ARM

Activation automatiqueAutomatic activation

AND auto : (A ou B <1200) + RPR + (FLT ou >60 kt) + TE sortis.Auto AND: (A or B <1200) + RPR + (FLT or >60 kt) + TE extended.

AND

(Pression A < 1 200 PSI) OU (Pression B < 1 200 PSI)(System A press. < 1,200 PSI) OR (System B press. < 1,200 PSI)
RPR n’est pas revenu High PressRPR failed to return to High Press
(Air/Gnd FLT) OU (Wheel Speed > 60 kt)(Air/Gnd in FLT) OR (Wheel Speed > 60 kts)
TE Flaps sortisTE Flaps extended

(*) As Installed — after RSEP : la pompe STBY s’active aussi si le FFM PCU principal trippe.(*) As Installed — after RSEP: STBY pump also auto-activates when the main PCU FFM trips.