# SDR DXTA2026031307220

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2026
- Submitted: March 13, 2026
- Operation: Air carrier
- Aircraft: [N794QS](https://openairdocs.org/aircraft/N794QS), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 20638
- Aircraft time: 10,433 hours, 6,056 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Warning Message
- Condition: False Activation
- 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/DXTA2026031307220

## Discrepancy

INFLIGHT CYAN EICAS 'FIRE SYS FAULT' DISPLAYED. B3-008147   CANNOT DUPLICATE ISSUE. DISCONNECTED CONNECTOR A91P2 AT THE FIREX CONTROL UNIT AND PERFORMED A RESISTANCE CHECK FROM PIN 17 TO PIN 18. TOTAL RESISTANCE SHOULD BE AROUND 11.67 OHMS AND THE MULTIMETER WAS READING 9.3 OHMS. RESISTANCE CHECKED GOOD. OPENED RH ENGINE COWL AND PERFORMED A GVI ON PYLON LOOP (A101) , ENGINE CORE LOOP (A99), GEAR BOX LOOP (A102) AND THE FORWARD NACELLE LOOP (A100). ALL LOOPS CHECKED GOOD. NO DEFECTS NOTED. REF CL-350 SMARTFIX FOR B3-008147 CODE TROUBLESHOOTING RECOMMENDATIONS. MCC ELECTED TO CLEAR MEL DUE TO NO HISTORY.

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