# SDR 96ZZZX3405

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N911TM](https://openairdocs.org/aircraft/N911TM), registered now
- Make and model: Aerosp AS 355F1
- Registry model: [Aerosp AS 355F1](https://openairdocs.org/model/aerospatiale-as-355f1) (OpenAirDocs)
- Aircraft serial: 5059
- Engine: Allsn 250C20F
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Union
- Part number: 355A64302020
- Condition: Cracked
- Location: Fuel Dist
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX3405

## Discrepancy

REMOVED FOR A FUEL PUMP BYPASS CHECK DUE TO DELAYED LIGHT-OFFS ON A C20F ENGINE.  UNION WAS FOUND CRACKED AFTER LOOSENING B-NUT.  BYPASS CHECK COMPLETED AND CHECK PASSED, STILL HAD NO RESOLVE TO DELAYED LIGHT-OFFS.  INSTALLED UNION AND FUEL TUBE ASSEMBLY AND TIGHTENED B-NUT, THE INSIDE FLARE BROKE-OFF WITH B-NUT.  AFTER INSPECTING THE UNION, SIGNS OF FRETTING WERE PRESENT AND THERE WAS A CRACK PRIOR TO IT FAILING.  REPLACED UNION WITH NEW ONE.  THE DELAYED LIGHT-OFFS PROBLEM WAS CORRECTED.

---
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.