# SDR UIEA2021051101117

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2021
- Submitted: May 11, 2021
- Operation: Air carrier
- Aircraft: [N1399A](https://openairdocs.org/aircraft/N1399A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27959
- Aircraft time: 93,594 hours, 18,360 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Circuit Card
- Part number: 644501
- Part serial: 16881
- Condition: Failed
- Location: Lt Fire Loop
- Stage of operation: NR
- 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/UIEA2021051101117

## Discrepancy

LEFT ENGINE FIRE LOOP 1 STATUS MESSAGE(<P>PERFORMED GVI OF FIRE LOOP 1 SYSTEM, NO DEFECTS NOTED. PERFORMED FIM 26-11 FT804 ENG FIRE DETECT BITE, TO SHEET 3 BLOCK 4. SUSPECT BAD LEFT ENG CONTROL CARD M681 FIRE LOOP 1. REMOVED AND REPLACED M681 FIRE LOOP 1 IAW AMM 26-10-01. OPS CHECKED PER AMM 26-11-00. NO FAULTS NOTED</P>)

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