# SDR IPXA12M75335

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2012
- Submitted: September 17, 2012
- Operation: Air carrier
- Aircraft: [N253UP](https://openairdocs.org/aircraft/N253UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48439
- Engine: Ge CF680C2D1F
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: NAS1611111
- Condition: Damaged
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA12M75335

## Discrepancy

TWO HOURS OUT, LOSS OF NR 3 HYD SYS DOWN TO 4.7 GALS.  LOWERED GEAR AND LOST REMAINING FLUID.  EMERGENCY DECLARED.  FOUND BLOWN O-RING RT MLG BOGIE TRIM CYLINDER. REPLACED, LEAK CHECKED GOOD IAW MM 29-00-00, TASK 790-801. SERVICE NR 3 RESERVOIR IAW MM 12-13-02 TASK 600-801.

---
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.