# SDR AALA201606089001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2016
- Submitted: June 9, 2016
- Operation: Air carrier
- Aircraft: [N179UW](https://openairdocs.org/aircraft/N179UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1521
- Aircraft time: 51,205 hours, 19,036 cycles
- System (JASC): [2842 · Fuel Quantity Sensor](https://openairdocs.org/jasc/2842)
- Part: Control Unit
- Part number: 300420601
- Part serial: 0946
- Condition: Defective
- Location: Fuel System
- Part time: 15,816 hours, 5,856 cycles
- Stage of operation: CR
- 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/AALA201606089001

## Discrepancy

AIRCRAFT WAS NOT GNDED.  WITH FUEL IN CTR TANK, RT CTR PUMP IS CYCLING EVERY 10 SECONDS, KEEPING RT WING TANK FULL AT 13740, CLOSE TO OVERFULL.  NOT LETTING WING BURN DOWN TO 550#S AS NORMAL.  REPLACED FUEL LEVEL SENSING CONTROL UNIT FLSCU, RELAYS 8QL & 10QL IAW MM 28-46-34, ESPM 20-46-50 & 28-26-51-400-001A.  A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.  SEE AALA201606099014 & AALA201606099015.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.