# SDR AALA202608102391

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2026
- Submitted: August 10, 2026
- Operation: Air carrier
- Aircraft: [N889NN](https://openairdocs.org/aircraft/N889NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33314
- Aircraft time: 41,231 hours, 17,885 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic System
- Condition: Low Pressure
- Location: Zone 100
- Stage of operation: CR
- 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/AALA202608102391

## Discrepancy

AIRCRAFT WAS GROUNDED: CLIMBING OUT OF SMF, ON GEAR RETRACTION, THE HYD MASTER CAUTIONCAME ON FOR ABOUT 3 SECONDS THEN BLINKED OUT.  AT CRUISE WE NOTICED HYD SYS A DROPPING 1% EVERY 5-10 MINUTES. HYD SYS B WAS DROPPING ABOUT 1% EVERY 15-20 MINUTES. ON DESCENT, SYS A WAS 64% AND B WAS DOWN TO 89%. DECESION MADE TO DIVERT TO ABQ, NO EMERGENCY DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. AFTER LANDING SYS A IS AT 86% AND B IS AT 92%. MAINTENANCE INSPECTED ENTIRE AIRCRAFT FOR HYD LEAKS AND NO LEAKS FOUND. PERFORMED BLEEDING OF HYDRAULIC SYSTEMS IAW AMM 29-00-00. SERVICED HYDRAULIC IAW AMM 12-12-00. RAN BOTH ENGINES AND PERFORMED HYDRAULIC PUMPS CHECK, NO DROPPING NOTED REF AMM 71-00-00. OK FOR SERVICE.

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