# SDR AALA202409069372

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2024
- Submitted: September 6, 2024
- Operation: Air carrier
- Aircraft: [N951AA](https://openairdocs.org/aircraft/N951AA), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29538
- Aircraft time: 63,737 hours, 26,706 cycles
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: O-Ring
- Condition: Leaking
- Location: Hyd Pump
- 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/AALA202409069372

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: WHILE IN CRUISE ENG 1 HYDRAULIC PUMP LOW PRESSURE LIGHT FLICKERED. FOUND HYDRAULIC SYSTEM A QUANTITY AT 40% AND DROPPING, SYSTEM QUANTITY DROPPED AS LOW AS 0% THEN ROSE TO 13% SHORTLY AFTER RUNNING CHECKLIST; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT ORD. **SUPPLEMENTAL REPORT FOR (AALA202409043270): REPLACED NUMBER 1 (EDP)-ENGINE DRIVIEN PUMP ((AALA202409043270)), AND REPLACED MODULAR PACKAGE ASSEMBLY BLUE PLUG O-RING ((AALA202409069372)), PERFORMED SYSTEM A AND SYSTEM B FLUSH, SYSTEM OPERTIONAL CHECK AND LEAK CHECK GOOD. PER AMM 29-11-11**(CLOSED).

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