Volcanic Ash

πŸ“š Source: QRH 7.40~7.42 (D632W001-AAR)

Condition

Volcanic ash is suspected when one or more of these occur:

  • Static discharge around the windshield
  • Bright glow in the engine inlets
  • Smoke or dust on the flight deck
  • Acrid odor (λ§€μΊν•œ λƒ„μƒˆ)

Checklist

  1. Exit the volcanic ash as quickly as possible. Consider a 180Β° turn. Consider a descending turn.
  2. Don oxygen masks and smoke goggles, if needed
  3. Establish crew communications, if needed
  4. Dual Eng Fail/Stall 체크리슀트λ₯Ό μ§€μ‹œ μ „κΉŒμ§€ μˆ˜ν–‰ν•˜μ§€ 말 것
  5. 이 체크리슀트 μˆ˜ν–‰ 쀑 μ–‘ μ—”μ§„ λͺ¨λ‘ κ³ μž₯ μ‹œ:
    • Both FUEL CONTROL switches β€” CUTOFF, then RUN
    • RAT switch β€” Push and hold 1 second
  6. ENG FAIL μ²΄ν¬λ¦¬μŠ€νŠΈλ„ μ§€μ‹œ μ „κΉŒμ§€ μˆ˜ν–‰ν•˜μ§€ 말 것
  7. When in volcanic ash: Minimize thrust if practical (EGT κ°μ†Œ β†’ μ—”μ§„ 손상 경감)
  8. ENGINE ANTI-ICE selectors (both) β€” ON
  9. WING ANTI-ICE selector β€” ON
  10. RECIRC FANS switches (both) β€” Off
  11. APU selector (if APU available) β€” START, then ON

ν™”μ‚°μž¬λ‘œ μΈν•œ 비정상 μ‹œμŠ€ν…œ λ°˜μ‘

  • μ—”μ§„ μ˜€μž‘λ™, EGT μƒμŠΉ, μ—”μ§„ μ„œμ§€/μŠ€ν†¨, Flameout
  • 속도 μ§€μ‹œ κ°μ†Œ λ˜λŠ” μ†Œμ‹€
  • EQUIP COOLING OVRD λ©”μ‹œμ§€
  • FIRE CARGO FWD or AFT λ©”μ‹œμ§€ (ν—ˆμœ„ 경보 κ°€λŠ₯)
  1. λ‹€μŒ 체크리슀트 μˆ˜ν–‰ κΈˆμ§€: EQUIP COOLING OVRD, ANTI-ICE ON
  2. λΆ„κΈ°:
    • Both engines failed β†’ Dual Eng Fail/Stall (QRH 7.2)
    • Single engine failed β†’ ENG FAIL L, R (QRH 7.16)
    • Both engines running β†’ Step 14
  3. Plan to land at the nearest suitable airport.

β– β– β– β–  (Checklist Complete)