# SDR ASAA2021032734455

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2021
- Submitted: March 30, 2021
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 54,848 hours, 15,998 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 0000
- Condition: Malfunctioned
- Location: Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021032734455

## Discrepancy

REF T/C 78273000, ENG 1 SHORT TIME FAULT73-20321 THE HMU FMV CONTROL CURRENT IS OUT OF RANGE. FLT LEG 0 &1. GROUNDED - YES. ACCOMPLISHED INTERROGATE THE FMC CDU FOR ENGINE FAULTS FOR #1 ENGINE ESN 895-405 PER T/C 78273000, VERIFIED NO MSG FAULTS LOGGED FOR THE LAST 10 FLT LEGS. EEC BITE TESTED GOOD W/O FAULTS.

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