# SDR ASAA2022020637378

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2022
- Submitted: February 17, 2022
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 54,373 hours, 15,994 cycles
- System (JASC): [7330 · Engine Fuel Indicating System](https://openairdocs.org/jasc/7330)
- Part: Hmu
- Part number: 442653
- Part serial: BECW5077
- Condition: Faulty
- Location: #1 Engine
- Part time: 45,023 hours, 15,502 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022020637378

## Discrepancy

WHILE PERFORMING TASK CARD 78273000, #1 ENG HAS SHORT TIME FAULT 73-30351 THE FMV POSITION SIGNAL DISAGREE, ON MULTIPLE FLIGHT LEGS. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 73-25 TASK 804, ALL CONTINUITY CHECKS GOOD. REMOVED AND REPLACED HMU PER TASK CARDS N8473000/N8473001. NO LEAKS NOTED.

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