# SDR AALA202102229021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2021
- Submitted: February 22, 2021
- Operation: Air carrier
- Aircraft: [N157UW](https://openairdocs.org/aircraft/N157UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 5696
- Aircraft time: 22,951 hours, 9,186 cycles
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Solenoid
- Part number: 341F010000
- Part serial: 12247
- Condition: Defective
- Location: Fuel Flow
- Part time: 22,766 hours, 9,164 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202102229021

## Discrepancy

AIRCRAFT WAS GROUNDED: DURING CRUISE, DESCENT, APPROACH, AND TAXI IN, LEFT ENGINE FUEL FLOW WAS SURGING APPROX 200 POUNDS PLUS + AND MINUS.  VISIBLE ON ENGINE PARAMETERS N2, N1, EGT, ALSO FELT ON THE AIR PRESSURE IN THE CABIN.  TAXI IN FUEL FLOW ON RIGHT ENGINE WAS APPROX 600 POUNDS LEFT ENGINE WAS VARYING UP TO 890 WITH ALL EQUAL THRUST SETTINGS.  REPLACED LEFT ENGINE PRESSURE REGULATOR VALVE PER AMM 36-11-52 (AALA202102229002) AND THE THERMOSTAT SOLENOID PER AMM 36-11-43 (AALA202102229021).  A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

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