# SDR AALA201905269012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2019
- Submitted: May 27, 2019
- Operation: Air carrier
- Aircraft: [N925AN](https://openairdocs.org/aircraft/N925AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29526
- Aircraft time: 58,587 hours, 23,801 cycles
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Pressure Switch
- Part number: 21C13211
- Part serial: 1111
- Condition: Faulty
- Location: Fuel System
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201905269012

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS UNCOMMANDED FUEL TRANSFER / BURN OUT OF #1 WING TANK AT APPROX 200 PPH VERIFIED BY CONSTANT NEED TO ADD LEFT RUDDER TRIM TO COUNTERACT . 500 POUND SPLIT IN LESS THEN 3 HRS. MAINTENANCE REMOVED AND REPLACED LT AFT BOOST PUMP LOW PRESS SWITCH IAW AMM 28-42-11. OPS & LEAK CHECK GOOD.

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