# SDR AALA202604146955

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2026
- Submitted: April 14, 2026
- Operation: Air carrier
- Aircraft: [N992NN](https://openairdocs.org/aircraft/N992NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31244
- Aircraft time: 28,096 hours, 12,134 cycles
- System (JASC): [2932 · Hydraulic Pressure Sensor](https://openairdocs.org/jasc/2932)
- Part: Pressure Switch
- Part number: 233A32092
- Condition: Failed
- Location: Hyd Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604146955

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LOW PRESSURE LIGHTS ILLUMINATED ON BOTH THE SYSTEM A ENGINE DRIVEN PUMP AND ELECTRIC PUMP DURING GEAR RETRACTION ON TAKEOFF. HYDRAULIC INDICATION SHOWED AS LOW AS 1400 PSI BEFORE RECOVERING, LOW PRESSURE LIGHTS WERE ILLUMINATED. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DFW.  REMOVED AND REPLACED LEFT ENGINE (EDP)-ENGINE DRIVEN PUMP (AALA202604011429), PER AMM 29-11-11. ALSO, REMOVED AND REPLACED THE STANDBY EMDP LOW PRESSURE SWITCH (AALA202604146955), PER AMM 29-34-31. ALL OPS AND LEAK CHECKED GOOD.

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