LOSS OF SYSTEM B • Hydraulics

NNC

LAND PERFNO AUTOLANDSYSTEM B

ConditionCondition

Perte du système hydraulique B.Loss of hydraulic system B.

ObjectifObjective

Relier perte B aux effets (flaps/slats, yaw damper, LAND PERF) — étapes dans Urgence.Relate loss of B to effects (flaps/slats, yaw damper, LAND PERF) — steps in Emergency.

Logique de détectionDetection logic

Pression B ≈ 0 PSISystem B pressure near 0 PSI
Quantité B ≈ 0 USGSystem B quantity near 0 USG

AND

Sortie OROR output
Les deux LOW PRESSURE pompesBoth pump LOW PRESSURE lights
Flight Control LOW PRESSURE BSystem B Flight Control LOW PRESSURE
FEEL DIFF (TE Flaps UP)FEEL DIFF (TE Flaps UP)

Même logique que Loss A — côté B.Same logic pattern as Loss A — system B side.

On GND

Même note filtre retour (contamination A). FLT CTL → STBY RUD : observations pour système B (B FLT CTL LP s’éteint).Same return-filter note (A contamination). FLT CTL → STBY RUD: observations for System B (B FLT CTL LP extinguishes).

In FLT

Mêmes observations STBY RUD. Si STBY LP reste → P6-11 / P6-12. HYD PUMP both OFF. Pendant extension flaps : lever à la position désirée — Speed Tape : barre rouge/noire = placard lever ; jaune = placard suivant (capteur position réelle).Same STBY RUD observations. If STBY LP remains → P6-11 / P6-12. HYD PUMP both OFF. During flap extension: set lever to desired — Speed Tape: red/black bar = lever placard; yellow = next (actual position sensor).

HYD PUMP switches (both)OFF

Systèmes à surveillerSystems requiring attention

Autopilot

Autopilot A disponible.Autopilot A available.

Engines, APU

Eng 2 TR via STBY — retardé / plus lent.Eng 2 TR via STBY — delayed / slower.

Flight Controls

Electric Trim OK. ALTN flaps ≈ 2 min jusqu’à 15 — pas de protection asymétrie. Spoilers outboard INOP. Main Yaw Damper INOP (OFF light reste éteint jusqu’à B FLT CTL OFF / STBY RUD).Electric Trim OK. ALTN flaps ≈ 2 min to 15 — no asymmetry protection. Outboard spoilers INOP. Main Yaw Damper INOP (OFF light stays out until B FLT CTL OFF / STBY RUD).

Landing Gear / Brakes

Train normal Up/Down. NWS OK. Freins normaux / AB INOP. Alternate brakes via A ; antiskid réduit (paires de roues).Gear normal Up/Down. NWS OK. Normal brakes / AB INOP. Alternate brakes via A; antiskid reduced (wheel pairs).

Approche · Atterrissage · G/AApproach · Landing · G/A

Horn config LG au G/A. Hold pour étendre flaps.LG config horn on G/A. Hold to extend flaps.
PI Loss of System B — Flaps 15 max freinage manuel. Antiskid moins efficace — ne pas appliquer marges table Antiskid INOP.PI Loss of System B — Flaps 15 max manual braking. Antiskid less effective — do not apply Antiskid INOP table margins.
SOP CAT I. G/A flaps 15 ; silence horn : flaps 10 elec / gear down / pull P6-3D AURAL WARN.SOP CAT I. G/A flaps 15; silence horn: flaps 10 elec / gear down / pull P6-3D AURAL WARN.
Diversion : TE ALTN UP ; LE restent ; full LE → 230 kt / 20 000 ft ; +10 % fuel LED. ATC fire standby.Diversion: TE ALTN UP; LE stay; full LE → 230 kt / 20,000 ft; +10% fuel LED. ATC fire standby.

PTU et astuce LEDand LED trick

AND

Air/Gnd FLTAir/Gnd FLT
TE not UP and < 15TE not UP and < 15
B EDP < 2 400 PSIB EDP < 2,400 PSI
ALTN Pos NOT DOWNALTN Pos NOT DOWN

TO Loss B : PTU cut-off ne rétracte pas LE quand ALTN TE UP. Fuite B ≈ 1.30 USG / 5 % EIS : ALTN Master OFF→ARM · Pos toggle 1 s UP→OFF · quand LE UP → Master OFF.TO Loss B: PTU cut-off won’t retract LE when ALTN TE UP. B leak ≈ 1.30 USG / 5% EIS: ALTN Master OFF→ARM · Pos toggle 1 s UP→OFF · when LE UP → Master OFF.

INOP — rappel rapideINOP — quick snapshot

Item	StatutStatus
A/P A · Elec trim · Gear · NWS	OK
TE Flaps	ALTN ~2 min → 15 · pas d’asymALTN ~2 min → 15 · no asym
Outbd Spoilers · Main YD	INOP
Normal brakes / AB	INOP
ALT brakes (A) · antiskid	OK · antiskid réduitOK · reduced antiskid
Eng 2 TR	via STBY (lent)via STBY (slow)
Landing / diversion	Flaps 15 · 230 kt / FL200 LE full · +10% LED

Compound Failures

ALTN flap fail : finir LOSS B jusqu’à Flaps puis NNC flap. STBY perdu : NNC STBY LP avant Descent Deferred ; rudder via A ; Eng2 TR INOP (ONE REV) ; LE INOP TE ALTN ; finir LOSS B à Flaps 15 GREEN puis LE FLAPS TRANSIT → Flaps 15 AMBER.ALTN flap fail: finish LOSS B to Flaps then flap NNC. STBY lost: STBY LP NNC before Descent Deferred; rudder via A; Eng2 TR INOP (ONE REV); LE INOP TE ALTN; finish LOSS B to Flaps 15 GREEN then LE FLAPS TRANSIT → Flaps 15 AMBER.