# SDR J7SA2020060329001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 29, 2020
- Submitted: June 3, 2020
- Operation: Air carrier
- Aircraft: [N593FX](https://openairdocs.org/aircraft/N593FX), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 20819
- Aircraft time: 775 hours, 413 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 4467014
- Part serial: 01120196327
- Condition: Faulty
- Location: Apu
- Stage of operation: CR
- 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/J7SA2020060329001

## Discrepancy

CYAN "FIRE SYS FAULT" MESSAGE ILLUMINATED INTERMITTENTLY DURING FLIGHT.  REMOVED AND REPLACED APU EDUCATOR FIRE LOOP A104 (IAW AMM 26-13-05; PN 446701-4 AND SN 01120196327).  REMOVED AND REPLACED APU FIRE WALL LOOP A103 (IAW AMM 26-13-01; PN 446701-3 AND SN 01220196328).  REMOVED AND INSTALLED MODIFIED FIRE EX CONTROL UNIT IAW AMM 26-11-01.  OPS CHECK GOOD.  ALSO VISUALLY INSPECTED THE APU SURGE VALVE, CLAMP, CONNECTOR, AND THE FIRE LOOP IN CLOSE PROXIMITY TO THE VALVE, NO DEFECTS NOTED.

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