# SDR DXTA2020120404433

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2020
- Submitted: December 7, 2020
- Operation: Air carrier
- Aircraft: [N20690](https://openairdocs.org/aircraft/N20690), registered now
- Make and model: Luscom 8A
- Registry model: [Luscom 8A](https://openairdocs.org/model/luscombe-8a) (OpenAirDocs)
- Aircraft serial: 20690
- Aircraft time: 20,690 hours, 2,142 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fault Message
- Condition: False Activation
- Location: Lt Eng Fire Loop
- Stage of operation: TX
- 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/DXTA2020120404433

## Discrepancy

FIRE SYS FAULT CYAN CAS MESSAGE.  LT ENGINE FIRE LOOP B B3-008146 AFTER STARTING BOTH ENGINES (PRE-FLIGHT).  SIGNOFF.  RESEARCHED FIRE SYSTEM AND RESEARCHED LT ENGINE FIRE LOOP B B3-008146 ON SMART FIX.  GAINED ACCESS TO FIREX BOX, DISCONNECTED A91P2, AND PERFORMED A CONTINUITY CHECK OF PINS 10 AND 11.  FOUND CONTINUITY CHECK TO BE GOOD.  CYCLES CIRCUIT BREAKERS CB2-A11 AND CB6-A4.  CHECKED PINS, CLEANED CONNECTOR, AND RE-SECURED CONNECTOR, IAW CL-350 AMM 26-11-01-04.  POWERED UP AIRCRAFT, CHECKED FOR CURRENT FAULTS AND NO FAULTS FOUND.  PERFORMED MDC DOWNLOAD,AND PERFORMED AN OPERATIONAL TEST OF THE FIRE DETECTION AND EXTINGUISHING [FIREX] SYSTEM, IAW CL-350 AMM 12-11-00-05 SEVERAL TIMES, AND THE WAS FOUND SATISFACTORY.  PREPPED THE AIRCRAFT AND PERFORMED TWO NORMAL STARTS WITH BOTH ENGINES, IAW CL-350 AMM 71-00-00-00, AND NO FAULTS OR CAS MESSAGES APPEARED.  CONTACTED NJA MCC AND ADVISED THEM THAT WE COULD NOT DUPLICATE THE DISCREPANCY.  NO HISTORY WAS FOUND AND NJA MCC ELECTS TO HAVE THE AIRCRAFT RELEASED.

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