# SDR FDEA202104110885

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2021
- Submitted: April 30, 2021
- Operation: Air carrier
- Aircraft: [N589FE](https://openairdocs.org/aircraft/N589FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48491
- Aircraft time: 87,173 hours, 19,245 cycles
- Engine: Ge CF680C2D1F
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 442636
- Part serial: BECK1383
- Condition: Malfunctioned
- Location: Nr 3 Engine
- Part time: 37,195 hours, 14,884 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202104110885

## Discrepancy

PASSING - 1000 FT MSL, EXPERIENCED 4-5 LOUD BANGS  WITH ACFT VIBRATION. F/O NOTICED A FLUCUATION ON  THE #3 ENG N1 GAGE .  TOWER REPORTED BLACK SMOKE  FROM #3 ENG. AFTER THRUST REDUCTION, NO FURTHER  ABNORMAL INDICATIONS REMOVED AND REPLACED CIT SENSOR, HMU, AND LOW PRESSURE CHECK VALVE ALL  REF AMM 73-21-11-4, 73-21-04-01, AND 36-11-01-4, ALL ENGINE CHECKS PERFORMED REF AMM 71-00-005 NO AIR LEKS, FUEL LEAKS, ALL TESTS PASSED  FOR COMPONANTS CHANGED PREVIOUSLY.VERIFIED ALL BORESCOPE PLUGS INSTALLED

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