# SDR IPXA202410290001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 2024
- Submitted: October 29, 2024
- Operation: Air carrier
- Aircraft: [N427UP](https://openairdocs.org/aircraft/N427UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25458
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: NAS161216
- Condition: Deformed
- Location: Hyd System
- Stage of operation: DE
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA202410290001

## Discrepancy

LOST THE LEFT HYD ALMOST COMPLETELY DURING DESCENT TO LHBP (BUDAPEST, LISZT FERENC NATIONAL AIRPORT HUNGARY). THE A/C LANDED AND STOPPED SAFELY ON RNWY 13R.   A/C TOWED TO STAND T/S STARTED TO INVESTIGATE THE CAUSE OF HYD LOSS L/H HYD SYS.   LINE MTC TROUBLE SHOOTING FIND THE PRESSURE MODULE UNION O RING GOT LOSS ITS SHAPE.  REPLACED THE O-RING

---
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.