# SDR ESU2004F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 29, 2004
- Submitted: April 16, 2004
- Operation: Air carrier
- Aircraft: N274JS
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 274
- Engine: Garrtt TFE7312B
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Carbon Seal
- Condition: Leaking
- Location: Nr 1 Engine
- Stage of operation: NR
- 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/ESU2004F00000

## Discrepancy

UPON COMPLETION OF A FOUR POINT RUN AND CASE PRESSURE CHECK IT WAS NOTED THAT THE NR 3 AND NR 4, CARBON SEALS WERE LEAKING.  THIS REQUIRED AND ENGINE CHANGE OF NR 1 ENGINE.

---
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.