# SDR CALA2025080607362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2025
- Submitted: August 6, 2025
- Operation: Air carrier
- Aircraft: [N672UA](https://openairdocs.org/aircraft/N672UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30027
- Aircraft time: 88,358 hours, 17,738 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: NAS161212A
- Condition: Worn
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025080607362

## Discrepancy

HYDRAULIC CENTER SYSTEM, SUSPECT LEAK IN AREA OF AIR DRIVEN PUMP FILTER MODULE, LT WHEEL WELL HYDRAULIC PRESSURIZATION WITH ADP CUT OUT IAW AMM 29-11-00-862-216, LH WHEEL WELL ADP FILTER MODULE INLET PRESSURE UNION FOUND LEAKING HYD FLUID. O-RING ON THE INLET PRESSURE UNION FOUND WORN.  ADP FILTER MODULE INLET PRESSURE UNION O-RING REPLACED IAW AMM 29-11-19-404-029. LEAK CHECK OUT, NO LEAKS FOUND AT THE FILTER MODULE.

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