# SDR AALA202607070317

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2026
- Submitted: July 7, 2026
- Operation: Air carrier
- Aircraft: [N843NN](https://openairdocs.org/aircraft/N843NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30906
- Aircraft time: 46,687 hours, 19,866 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: 849589
- Part serial: MX626968
- Condition: Faulty
- Location: Hyd Sys
- Part time: 72,661 hours, 31,169 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607070317

## Discrepancy

AIRCRAFT WAS GROUNDED: BOTH ELEC AND ENG LOW PRESSURE LIGHTS ILLUMINATED AFTER GEAR RETRACTION ON TAKEOFF. EVENTUALLY ELECTRICAL LIGHT EXTINGUISHED BUTENGINE DRIVEN PUMP REMAINED ILLUMINATED. RAN QRH.  A HYD SYSTEMQTY WAS 75% AND EVENTUALLY DOWN TO 66%. COORDINATED WITH MOC AND DISPATCH AND AGREED TO RETURN TO CLT. WHEN WE PUT THE GEAR DOWN TO LAND THE QTY WENT BACK UP TO NORMAL LEVELS. EMERGENCY DECLARED AND AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED ENG 1 HYD PRESSURE LINE AND ENG 1 HYD EDP IAW AMM 29-11-11.

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