Dual Eng Fail/Stall

Condition: Engine speed for both engines is below idle.

CAUTION

이것은 가장 심각한 비정상 상황 중 하나입니다. 양 엔진 모두 작동불능.

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Memory Items 🔴

CAUTION

MEMORY ITEMS — MUST BE COMPLETED FROM MEMORY

1. FUEL CONTROL switches (both) … CUTOFF, then RUN
2. RAM AIR TURBINE switch … Push and hold for 1 second

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Reference Items 🟢

• Step 3: Set airspeed above 240 knots
• Step 4: APU selector (if APU available) … START, then ON
• Step 5: If volcanic ash is suspected:
  • → Go to Volcanic Ash checklist (page 7.40), return when directed
• Step 6: Engines can accelerate to idle very slowly, especially at high altitudes. If N2 is steadily increasing and EGT stays within limits, do not interrupt the start.
• Step 7: When one engine is running → Go to Step 8
• Step 8: FUEL CENTER PUMPS switches (both) … Off
• Step 9: Wait 5 seconds

Step 10: Fuel Center Tank Decision

FUEL IN CENTER message is blank	FUEL IN CENTER message shows
→ Go to Step 11	FUEL CENTER PUMPS switches (both) … ON
	→ Go to Step 11

• Step 11: When the HEAT PITOT L+C+R message blanks:
  • PRIMARY FLIGHT COMPUTERS disconnect switch … DISC, then AUTO
  • This step restores the flight control normal mode.
  • Re-engage the autopilot as needed when flight control normal mode is restored.

■ ■ ■ ■

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Decision Flowchart

flowchart TD
    A[Dual Eng Fail/Stall] --> M1["🔴 Memory Items:<br/>1. FUEL CONTROL both CUTOFF → RUN<br/>2. RAT switch Push & Hold 1 sec"]
    M1 --> B["Set airspeed > 240 kts"]
    B --> C{APU available?}
    C -->|Yes| C1["APU START → ON"]
    C -->|No| D
    C1 --> D{Volcanic ash<br/>suspected?}
    D -->|Yes| D1["Go to Volcanic Ash checklist<br/>Return when directed"]
    D -->|No| E
    D1 --> E["Wait for engine restart<br/>(do not interrupt if N2↑ & EGT normal)"]
    E --> F{One engine<br/>running?}
    F -->|No| E
    F -->|Yes| G["FUEL CENTER PUMPS both Off<br/>Wait 5 sec"]
    G --> H{FUEL IN CENTER<br/>message?}
    H -->|Blank| I["Step 11: When HEAT PITOT blanks<br/>PFC DISC → AUTO"]
    H -->|Shows| H1["FUEL CENTER PUMPS both ON"] --> I

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Notes & Gotchas

WARNING

• Step 1의 CUTOFF, then RUN 순서가 핵심 — 연료 라인을 리셋한 후 재공급
• Step 2의 RAT 전개 — 유압/전기 백업 확보 필수
• 240 knots 이상 유지 — Windmill relight에 필요한 최소 속도
• 고고도에서는 엔진 재시동이 매우 느림 — N2가 꾸준히 올라가고 EGT 한계 내이면 중단하지 말 것

Cross-References