# SDR CALA2025071106464

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 2025
- Submitted: July 11, 2025
- Operation: Air carrier
- Aircraft: [N668UA](https://openairdocs.org/aircraft/N668UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30024
- Aircraft time: 91,391 hours, 18,537 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Drain
- Condition: Leaking
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025071106464

## Discrepancy

LOSING CENTER HYDRAULIC SYSTEM FLUID. CURRENTLY ABOUT 47% LEFT IN RESERVOIR. FOLLOWED FLIGHT MANUAL NON-NORMALS 2.130.8 AND HAVE 2 ACMP & AIR DRIVEN PUMP OFF TO PRESERVE FLUID FOR LANDING.   UPON FURTHER INVESTIGATION SEAL ON RETURN SIDE OF C2 CASE DRAIN ASSY FOUND IN POOR CONDITION.  SEAL REPLACED IAW AMM 29-11-18-404-036. CENTER HYD SYS SERVICED TO FULL IAW AMM 12-12-01.  LEAK CHECK CARRIED OUT FOR C2 ACMP IAW AMM 29-11-18-404-036, NO LEAKS. CENTER HYD SYS LEAK INSP CARRIED OUT IAW FIM 29-11 TASK 802-C3, NO LEAKS VISIBLE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.