# SDR ASAA2022070539078

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2022
- Submitted: July 18, 2022
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 42,867 hours, 12,387 cycles
- System (JASC): [2610 · Detection System](https://openairdocs.org/jasc/2610)
- Part: Detector
- Part number: 902864
- Condition: Failed
- Location: #2 Engine
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022070539078

## Discrepancy

#2 FIRE TEST LIGHT DOES NOT ILLUMINATE ON THE "B" LOOP. GROUNDED - YES. REMOVED AND REPLACED #2 ENG UPPER FAN DETECTOR ASSY AND OPS CKS NML IAW B737-800 AMM 26-11-01.

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