# SDR ASAA2020101733378

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 17, 2020
- Submitted: October 19, 2020
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 32,082 hours, 9,387 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7510 · Engine Anti-Icing System](https://openairdocs.org/jasc/7510)
- Part: Pressure Sensor
- Part number: 21SN4152
- Condition: Faulted
- Location: Nr 1 Eng Antice
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020101733378

## Discrepancy

NUMBER 1 ANTI-ICE TAI ILLUMINATED AMBER WITH SWITCH IN ON POSITION.  POSITIONING SWITCH TO OFF TAI AMBER GOES AWAY.  BLUE COWL VALVE OPEN LIGHT OPERATES NORMALLY.  GROUNDED-YES.  REMOVED AND REPLACED NR 1 ENGINE ANTI-ICE PRESSURE SENSOR.  INSTALLATION TEST GOOD, REF B737-800 AMM 30-21-21.   INSTALLATION TEST GOOD, REF AMM 30-21-21.  ACCOMPLISHED NR 1 ENGINE COWL TAI VALVE OPERATIONS CHECK DURING ENGINE RUN.  OPERATIONS CHECK GOOD, REF AMM 30-21-21.  AMBER LIGHT FOR NR 1 ENGINE ANTI-ICE DID NOT ILLUMINATE WITH SWITCH IN ON POSITION.

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