QRH: ANTI-ICE ENG L, R

한 줄 요약: Engine anti-ice valve가 commanded open인데 안 열림 → 지상이면 thrust 올려서 시도, 비행 중이면 OFF→ON cycling → 안 되면 OFF + icing 회피.

Trigger (QRH 3.1)

ANTI-ICE ENG L, R EICAS advisory — engine anti-ice valve is closed when commanded open.

흐름 요약 (QRH 3.1~3.2)

graph TD
    A["ANTI-ICE ENG L, R"] --> B{지상 / 비행?}
    B -->|On the ground| C["Step 2: Thrust lever advance<br/>N1 ~3% above idle"]
    C --> D{message blanks?}
    D -->|blanks| OK1["✓ 복구"]
    D -->|stays shown| E["Step 3: Selector OFF → ON"]
    E --> F{message blanks?}
    F -->|blanks| OK2["✓ 복구"]
    F -->|stays shown| G["Step 5: Selector OFF<br/>Avoid icing conditions"]
    B -->|In flight| H["Step 6: Selector OFF → ON"]
    H --> I{message blanks?}
    I -->|blanks| J["Note: Run anti-ice<br/>manually ✓"]
    I -->|stays shown| K["Step 8: Selector OFF<br/>Avoid icing conditions"]

Step 1: Choose one (QRH 3.1)

1. Choose one:
   • On the ground → Step 2
   • In flight → Step 6

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지상 경로: Step 2-5 (QRH 3.1)

2. Thrust lever (affected side) → Advance until N1 is approximately 3% above idle (QRH 3.1, Step 2)

3. Choose one:

   • ANTI-ICE ENG message blanks → ■ ■ ■ ■
   • ANTI-ICE ENG message stays shown → ENGINE ANTI-ICE selector (affected side) OFF, then ON → Step 4

4. Choose one:

   • ANTI-ICE ENG message blanks → ■ ■ ■ ■
   • ANTI-ICE ENG message stays shown → Step 5

5. ENGINE ANTI-ICE selector (affected side) → OFF

Note: Avoid icing conditions. (QRH 3.2, Step 5)

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비행 경로: Step 6-8 (QRH 3.2)

6. ENGINE ANTI-ICE selector (affected side) → OFF, then ON (QRH 3.2, Step 6)

7. Choose one:

   • ANTI-ICE ENG message blanks:

     Note: Run the affected engine anti-ice system manually. (QRH 3.2, Step 7)

     → ■ ■ ■ ■

   • ANTI-ICE ENG message stays shown → Step 8

8. ENGINE ANTI-ICE selector (affected side) → OFF

Note: Avoid icing conditions. (QRH 3.2, Step 8)

OMB 추가 조치 (POM AAR-52 R1)

이 NNC로 미복구 시 → AAR-52: 추가 OFF→ON cycling 최대 5회 시도 가능.

Cross-References

• AAR-52: Anti-Ice Valve Sticking — NNC 후 추가 cycling 절차