# SDR QMLA20260812

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2026
- Submitted: August 13, 2026
- Operation: Air carrier
- Aircraft: [N445SL](https://openairdocs.org/aircraft/N445SL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53445
- Aircraft time: 9,772 hours, 30,894 cycles
- Engine: Allsn 250C47B
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Indicator
- Part number: 407375001105
- Part serial: 0136
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA20260812

## Discrepancy

RECEIVED AND INSTALLED REPLACEMENT MGT INDICATOR. APPLIED GROUND POWER AND THE UNIT PASSED THE LCD TEST. AFTER ENGINE START THE MGT INDICATED ZERO. AIRCRAFT WAS SHUTDOWN AND I PERFORMED AN MGT INDICATOR FUNCTIONAL CHECK WITH THE BARFIELD TURBINE TEMP TESTER. THE GAUGE WAS DEAD ACCURATE. I PUT EVERYTHING BACK TOGETHER AND WE RAN UP THE AIRCRAFT AGAIN. AFTER A NORMAL BATTERY START THE INDICATOR WOULD READ CORRECTLY AND THEN DROP TO ZERO AT RANDOM INTERVALS (ROUGHLY EVERY 10-15 SECONDS). THE FIRST REPLACEMENT GAUGE HAD SAT ON THE SHELF FOR ABOUT 6 YEARS. THE SECOND REPLACEMENT GAUGE WAS REPAIRED IN APRIL OF THIS YEAR. THIS AIRCRAFT HAD NO MGT INDICATION ISSUES BEFORE REPLACING THIS GAUGE FOR A DIM SCREEN.

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