# SDR AALA20170223010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2017
- Submitted: February 24, 2017
- Operation: Air carrier
- Aircraft: [N754AN](https://openairdocs.org/aircraft/N754AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30262
- Aircraft time: 62,845 hours, 7,980 cycles
- System (JASC): [2842 · Fuel Quantity Sensor](https://openairdocs.org/jasc/2842)
- Part: Sensor
- Condition: Faulty
- Location: Fuel Tank
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170223010

## Discrepancy

AIRCRAFT WAS GROUNDED. RIGHT MAIN FUEL TANK INDICATION DROPPED 5,000 POUNDS IN FLIGHT. REPEATED ON 2/21/17 LHR FLIGHT 142 AND 2/22/17 JFK FLIGHT 105. REMOVED AND REPLACED RIGHT MAIN TANK UNIT NR 14, RIGHT MAIN TANK UNIT NR 15 (AALA20170224003), AND LEFT MAIN TANK UNIT NR 20 (AALA20170224004)IAW AMM 28-41-02. OPERATIONAL CHECK GOOD.

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