Engine failure + low visibility

오늘부터 Phase 5 — 문제가 둘씩 옵니다. 복합 상황의 정석은 하나예요: 고장 하나가 생기면, 그 아래 모든 질문을 다시 물어라. 엔진이 꺼지면 접근 능력이 강등되고, 접근 능력이 강등되면 받아들일 수 있는 날씨가 달라집니다. 문법은 두 사실을 한 문장에 접는 분사구문.

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1. Scenario

I was the First Officer of HL123, starting the descent, when the left engine failed — vibration, then a rapid loss of thrust, and a clean shutdown with the checklist.

We declared MAYDAY and secured the engine. The aircraft was stable on one engine, so the flying itself was under control. The real problem was waiting at the bottom of the descent: our destination was reporting RVR 300 metres — CAT III weather.

Here is where the two problems became one. Having lost an engine, we were limited to a CAT I approach — on one engine, our aircraft and our procedures do not allow an autoland to CAT III minima. So the destination's weather, fine for everyone else that morning, was now below our minima. ATC offered us the CAT III approach anyway; we explained it plainly: "Unable — single engine limits us to CAT I. Request diversion to our alternate."

The controller re-planned fast: direct routing to the alternate, where the visibility was well above CAT I minima, descent priority, and the fire service standing by. We flew a single-engine ILS there and landed without further trouble. One failure had re-priced everything below it — the approach, the weather, and the airport itself.

2. At a Glance

English — The left engine failed at the start of the descent — MAYDAY, checklist, aircraft stable on one engine. But the destination was at RVR 300, and having lost an engine, we were limited to CAT I: the failure downgraded our approach capability, so the weather that was fine for everyone else was now below our minima. We declined the offered CAT III approach, explained why, and diverted to an alternate with better weather, landing on a single-engine ILS. The rule: after any failure, re-ask every question downstream — capability, weather, fuel, airport.

한국어 — 강하 시작점에서 왼쪽 엔진이 꺼졌습니다 — MAYDAY, 체크리스트, 단발 상태로 기체는 안정. 문제는 목적지가 RVR 300(CAT III 날씨)이라는 것. 엔진을 잃으면 접근 능력이 CAT I으로 강등되고, 그러면 남들에겐 괜찮은 그 날씨가 우리에겐 최저치 아래가 됩니다. ATC가 CAT III 접근을 권했지만 이유를 설명하며 거절했고, 날씨가 좋은 교체공항으로 회항해 단발 ILS로 착륙했습니다. 원칙 — 고장이 나면 그 아래 모든 질문(능력·날씨·연료·공항)을 다시 물어라.

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3. Key Verbs

fail

뜻: 고장 나다

• The left engine failed at the start of the descent.
• One system failing re-prices everything below it.

shut down

뜻: (엔진을) 끄다

• We shut down the engine with the checklist.
• The engine was shut down cleanly.

downgrade

뜻: (능력·등급이) 강등되다

• Our approach capability was downgraded to CAT I.
• A failure downgrades more than the failed system.

limit

뜻: 제한하다

• Single engine limits us to CAT I.
• We were limited by procedure, not by nerve.

allow

뜻: 허용하다

• One engine does not allow an autoland to CAT III minima.
• Our procedures did not allow that approach.

explain

뜻: 설명하다

• We explained the limitation in one sentence.
• A clear reason, clearly explained, ends the discussion.

re-plan

뜻: 계획을 다시 세우다

• The controller re-planned our routing fast.
• The descent was re-planned toward the alternate.

stabilize

뜻: 안정시키다

• The aircraft stabilized on one engine.
• Speed and path were stabilized before the approach.

divert

뜻: 회항하다

• We diverted to an alternate with better weather.
• Diverting was the capability answer, not the scared one.

re-price

뜻: (가치·조건을) 다시 매기다

• One failure re-prices every question downstream.
• The weather was re-priced by the engine, not the forecast.

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4. Key Expressions & Collocations

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5. Vocabulary

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6. Sentence Frames

빈칸만 갈아끼우면 다른 복합 상황에도 그대로 씁니다.

• Having lost ____, we were limited to ____. → Having lost an engine, we were limited to CAT I.
• The weather was fine for everyone else, but ____ for us. → The weather was fine for everyone else, but below minima for us.
• Unable — ____ limits us to ____. → Unable — single engine limits us to CAT I.
• One failure re-priced ____. → One failure re-priced everything below it.
• We diverted to ____, where ____. → We diverted to our alternate, where the visibility was above our minima.

오늘의 표현 포인트 — "Having lost ____, we were limited to ____." 고장과 그 결과를 한 문장에 접는 분사구문 — 복합 상황 설명의 핵심 틀입니다.

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7. Common Mistakes → Better Phrasing

한국인이 자주 쓰는 틀리거나 약한 표현을, 시험에서 통하는 표현으로 바꿔 익히세요.

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8. Grammar Point — 분사구문 (Having + p.p., …)

두 문장을 하나로 접는 틀입니다. 복합 상황에서 "~한 상태였기에"를 앞에 얹으세요.

• Having lost an engine, we were limited to CAT I.
• Having declared MAYDAY, we had priority for the descent.
• Having secured the engine, we could think about the weather.

핵심: Having + 과거분사, 주어 + 동사. 원인·선행 사건을 콤팩트하게 앞세우면, 복합 상황이 한 문장씩 정리됩니다.

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9. Model Answer — Q1

"What happened to your aircraft? Explain the nature of the incident."

90초 뼈대 — ① 무슨 일(2문장) ② 조치·상호작용(34문장) ③ 결과 + 한 줄(12문장). 아래는 그 뼈대의 예시입니다.

At the start of the descent, our left engine failed — vibration, a rapid loss of thrust, then a clean shutdown with the checklist. We declared MAYDAY, and the aircraft was stable on one engine.

The second problem was the weather: our destination was reporting RVR 300 metres. Having lost an engine, we were limited to CAT I — one engine does not allow an autoland to CAT III minima — so the destination was now below our minima. ATC offered the CAT III approach anyway, and we declined it with the reason: "Unable, single engine limits us to CAT I — request diversion to our alternate." They re-planned quickly: direct routing, descent priority, fire service standing by.

We flew a single-engine ILS at the alternate and landed without further trouble. One failure re-prices everything below it — so after any failure, you re-ask every question downstream.

10. Model Answer — Q2

"How do you think ATC handled the situation? Could it have been handled differently?"

Q2 = ATC 평가로 의견 표현을 익히는 자리. 아래는 한 예시 — 외워서 그대로 쓰지 말고, 시작·마무리 표현은 자유롭게 바꿔 보세요.

The turn-around after our "unable" is what I would praise. The controller had offered CAT III with good intentions — the equipment was working, other aircraft were landing — but the moment we explained the single-engine limitation, there was no debate: new routing, descent priority, and the alternate's fire service were arranged inside a minute. Taking a crew's capability statement at once, without asking them to justify it twice, is exactly right.

The offer itself is the improvement point. An aircraft that has just declared MAYDAY for an engine failure has, in most types, lost its lowest minima — so a better first question is not "can you accept CAT III?" but "what approach capability do you have now?" Ask capability first, and the plan starts from reality. Still, once the reality was on the table, the handling was quick and clean.

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11. Follow-up Q&A

1. How do line pilots usually handle a combined failure like this? → Handle the failure first — fly, checklist, declare. Then re-ask every downstream question, because one failure changes the answers: approach capability, acceptable weather, fuel, and sometimes the airport itself.
2. Why does losing an engine change your weather minima? → The lowest approaches, like CAT III autoland, need systems and performance that a single-engine aircraft may not have. Lose the engine, and you lose the approach that goes with it.
3. Why did you decline an approach that ATC offered? → An offer is not a capability. They knew their equipment was working; only we knew what our aircraft could still do — so the "unable" had to come from us.
4. Was diverting the cautious choice or the correct one? → The correct one. The alternate was above our minima and the destination was below it — that is not caution, that is arithmetic.

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12. Shadowing Sentences

각 문장을 3~5번 소리 내어 따라 하세요.

1. The left engine failed at the start of the descent.
2. We declared MAYDAY and secured the engine.
3. The aircraft was stable on one engine.
4. The destination was reporting RVR 300 metres.
5. Having lost an engine, we were limited to CAT I.
6. The weather was now below our minima — for us, not for everyone.
7. Unable — single engine limits us to CAT I.
8. We requested diversion to our alternate.
9. We flew a single-engine ILS and landed safely.
10. After any failure, re-ask every question downstream.

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