# SDR ASAA2017090721871

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 7, 2017
- Submitted: September 11, 2017
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 14,127 hours, 4,680 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7510 · Engine Anti-Icing System](https://openairdocs.org/jasc/7510)
- Part: Valve
- Part number: 32156185
- Part serial: 10763
- Condition: Failed
- Location: Nr 1 Anti Ice Sy
- Part time: 14,121 hours, 4,675 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017090721871

## Discrepancy

NR 1 COWL VALVE OPEN BRIGHT BLUE DISAGREE LIGHT ILLUMINATED WHEN ENGINE ANTI-ICE POSITIONED ON.  THRUST WAS AT IDLE.  ACFT GROUNDED.  REMOVED AND REPLACED THE NR 1 ENGINE COWL TAI VALVE IAW AMM 30-21-11. OPS AND LEAK CHECKED GOOD.

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