# SDR ASAA2017111822621

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2017
- Submitted: November 20, 2017
- Operation: Air carrier
- Aircraft: [N461AS](https://openairdocs.org/aircraft/N461AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36363
- Aircraft time: 14,546 hours, 4,777 cycles
- System (JASC): [3020 · Air Intake Anti/De-Ice System](https://openairdocs.org/jasc/3020)
- Part: Warning System
- Condition: Intermittent
- Location: Cockpit
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017111822621

## Discrepancy

ON CLIMBOUT (CLIMB POWER) ATTEMPTED TO SELECT NR 1 ENG TAI OFF BLUE LIGHT ILLUMINATED IN TRANSIT POSITION BUT DID NOT EXTINGUISH. CYCLED ENG TAI SWITCH 3 TIMES AND LIGHT EXTINGUISHED ON 3RD CYCLE. VALVE OPERATED NORMALLY IN CRUISE AND DURING DESCENT AT IDLE POWER. GROUNDED - YES. ACCOMPLISHED FIM 30-21 TASK 804. INITIAL EVALUATION CHECK NORMAL. FOUND TO BE AN INTERMITTENT FAULT. A/C OK FOR SERVICE.

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