# SDR QMLA2026032120022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2026
- Submitted: March 21, 2026
- Operation: Air carrier
- Aircraft: [N773AL](https://openairdocs.org/aircraft/N773AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53819
- Aircraft time: 7,146 hours
- Engine: Allsn 250C47B
- System (JASC): [7397 · Engine Fuel System Wiring](https://openairdocs.org/jasc/7397)
- Part: Wire Harness
- Condition: Faulted
- Location: Fadec
- Stage of operation: AP
- How discovered: O
- Nature of condition: J, G
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2026032120022

## Discrepancy

ON SHORT FINAL THE FADEC CHANNEL FAIL CAUTION LIGHT ILLUMINATED; IT WAS FOLLOWED BY THE CHECK INSTRUMENT WARNING LIGHT A SECOND LATER, THEN FINALLY THE FADEC MAINTENANCE LIGHT CAME ON FOLLOWED BY A MARRIED LOSS OF MY NR AND NP NEEDLES. MUCH LIKE A BIT TEST THEY DROPPED TO ZERO MOMENTARILY AND THEN CAME BACK TO 100%. THERE WERE NO SECONDARY INDICATIONS OF ROTOR RPM OR ENGINE RPM CHANGE. ONCE THE NR AND NP NEEDLES WERE BACK IN THE GREEN THE FADEC MAINTENANCE LIGHT EXTINGUISHED.   I DID NOT PERFORM THE EMERGENCY PROCEDURE OF RESETTING THE FADEC AS I WAS ON SHORT FINAL WITH A SAFE LZ BELOW. I FELT IT MORE PRUDENT TO CONTINUE THE STABLE APPROACH. REPLACED THE HARNESS.

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