Perte du système hydraulique A.Loss of hydraulic system A.
ObjectifObjective
Relier perte A aux effets (LAND PERF, NO AUTOLAND, utilitaires) — étapes détaillées dans Urgence.Relate loss of A to effects (LAND PERF, NO AUTOLAND, utilities) — detailed steps in Emergency.
Logique de détectionDetection logic
OR
Pression A ≈ 0 PSISystem A pressure near 0 PSI
Quantité A ≈ 0 USGSystem A quantity near 0 USG
AND
Sortie OR ci-dessusOR output above
Les deux voyants pompe LOW PRESSUREBoth Hydraulic Pump LOW PRESSURE amber lights
Flight Control LOW PRESSURE système ASystem A Flight Control LOW PRESSURE
FEEL DIFF (TE Flaps UP)FEEL DIFF (when TE Flaps UP)
OR (press/qty ≈ 0) AND (deux LP pompes + FLT CTL LP + FEEL DIFF).OR (press/qty ≈ 0) AND (both pump LP + FLT CTL LP + FEEL DIFF).On GND
Filtre retour : cloison avant wheel well sous réservoir. Pin rouge ΔP si colmaté et OAT > 2 °C / 36 °F. Contamination « wire-edge » depuis systèmes A → appeler maintenance.Return filter: forward bulkhead wheel well below reservoir. Red ΔP pin if clogged and OAT > 2 °C / 36 °F. Wire-edge contamination from A-powered systems → call maintenance.
In FLT
Si qty ≠ 0 → vérifier d’abord EDP et EMDP. Dual pump fail : Abex OH réengageable après cool ; Vickers auto-coupe (LP+OH).If qty ≠ 0 → verify EDP and EMDP first. Dual pump fail: Abex OH may re-engage after cool; Vickers auto-cuts (LP+OH).
STBY RUD — observations— observations
FLT CONTROL → STBY RUD :FLT CONTROL → STBY RUD:
A FLT CTL LP s’éteintA FLT CTL LP extinguishes
STBY RUD ONSTBY RUD ON
STBY LOW QTY ne s’allume pasSTBY LOW QTY not lit
STBY LP momentané puis éteint (= pompe engagée)STBY LP momentary then out (= pump engaged)
Auto-eng si perte A/B sol >60 kt ou air flaps sortis → plus de momentané. Si STBY LP reste → pas pressurisé · vérifier P6-11 / P6-12.Auto-eng if A/B loss GND >60 kts or airborne flaps ext → no momentary. If STBY LP remains → not pressurized · check P6-11 / P6-12.
HYD PUMP switches (both)OFF
EMDP OH due to leak reste allumé jusqu’au refroidissement.EMDP OH from leak stays until cool.
Systèmes à surveillerSystems requiring attention
Automatic Flight
Autopilot B disponible.Autopilot B available.
Engines, APU
Eng 1 TR via STBY — déploiement retardé / plus lent.Eng 1 TR via STBY — delayed / slower deployment.
Flight Controls
Flaps, Electric Trim, Yaw Damper OK. Ground + Inboard Flight Spoilers INOP — roll / speedbrake ↓.Flaps, Electric Trim, Yaw Damper OK. Ground + Inboard Flight Spoilers INOP — roll / speedbrake ↓.
Landing Gear
Extension manuelle ; pas de rentrée. Retarder jusqu’à longue finale. NWS normal INOP — ALT NWS si installé ; sinon éviter RWY mouillée XW ; <60 kt freinage différentiel. Freins normaux / AB / antiskid OK.Manual extension; no retract. Delay until long final. Normal NWS INOP — ALT NWS if installed; else avoid wet XW RWY; <60 kt differential braking. Normal brakes / AB / antiskid OK.
Approach / Landing
Vecteurs longue finale. Flaps ≤10 avant gear (horn). Flaps 40 + AB. Éviter courte / mouillée. PI Non-Normal Landing Distance. SOP CAT I. G/A gear down — vérifier obstacles.Vectors long final. Flaps ≤10 before gear (horn). Flaps 40 + AB. Avoid short / wet. PI Non-Normal Landing Distance. SOP CAT I. G/A gear down — verify obstacles.
Diversion · ATC · CCMDiversion · ATC · CCM
Fuel +50 % gear down · PI LRC GEAR DOWNFuel +50% gear down · PI LRC GEAR DOWN
ATC : difficile d’évacuer si NWS INOPATC: hard to vacate if NWS INOP
CCM assis · remorquage si pas d’ALT NWSCCM seated · tow if no ALT NWS
INOP — rappel rapideINOP — quick snapshot
ItemItem
StatutStatus
A/P B · Flaps · Elec trim · YD
OK
Ground + Inbd Spoilers
INOP
LG
Manuel · pas de rentréeManual · no retract
NWS normal
INOP (ALT si installé)(ALT if installed)
Brakes / AB / antiskid
OK
Eng 1 TR
via STBY (lent)via STBY (slow)
Landing
Flaps 40 + AB · CAT I · +50% fuel gear
Compound · STANDBY
Faire NNC STANDBY LOW PRESSURE avant Descent Deferred de LOSS A. Rudder via B · Eng 1 TR INOP · PI ONE REV.Do STANDBY LOW PRESSURE NNC before Descent Deferred of LOSS A. Rudder via B · Eng 1 TR INOP · PI ONE REV.
Faits catalog hyd13. QRH / FCOM papier fait foi.Facts from hyd13 catalog. Paper QRH / FCOM prevails.