# SDR 2023FA0000831

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2023
- Submitted: December 14, 2023
- Operation: General aviation
- Aircraft: [N119NA](https://openairdocs.org/aircraft/N119NA), registered now
- Make and model: Boeing 757-200 SERIES
- Registry model: [Boeing 757-200 SERIES](https://openairdocs.org/model/boeing-757-200-series) (OpenAirDocs)
- Aircraft serial: 24487
- Aircraft time: 72,641 hours, 27,469 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic Line
- Part number: 312NN510131
- Part serial: NA
- Condition: Worn
- Location: Zone 500
- Stage of operation: CR
- How discovered: V
- Nature of condition: J, K
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000831

## Discrepancy

DURING ROUTINE FLIGHT AIRCRAFT N119NA HAD ECAIS MESSAGE L HYD QTY ,AND L HYD SYS PRESS. AFTER FURTHER INVESTIGATION FOUND ENGINE DRIVEN PUMP HYDRAULIC LINE PN 312N5101-31 HAD WORN A GROVE THAT ALLOWED DEPLETED OVER HALF OF SYSTEM QUANTITY TO LEAK. CONTRIBUTING FACTOR WAS FROM SUPPORT BLOCK  312N5110-5 WORN OUT WHICH ALLOWED METAL-ON-METAL CONTACT.

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