# SDR ASAA2021020634060

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2021
- Submitted: February 10, 2021
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 27,716 hours, 8,860 cycles
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Wire Harness
- Part number: CA24402
- Condition: Inoperative
- Location: Nr 1 Fire Loop
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021020634060

## Discrepancy

#A FIRE LOOP SHOWS FAULT UPON TESTING, #1 FIRE SWITCH DOES NOT ILLUMINATE ON TEST ALSO, OPS NORMAL IN B LOOP. GROUNDED - YES. REMOVED AND REPLACED ENG #1 MW0315 HARNESS REF B737-900 AMM 26-11-02-400-801, OPS NML REF AMM 26-11-00-710-801. MOVED SWITCH TO NORMAL.

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