# SDR BSYA2009007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2009
- Submitted: February 3, 2009
- Operation: Air carrier
- Aircraft: [N3587P](https://openairdocs.org/aircraft/N3587P), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 8052120
- Aircraft time: 11,681 hours
- Engine: Lyc TIO540*
- System (JASC): [3710 · Vacuum Distribution System](https://openairdocs.org/jasc/3710)
- Part: Plug
- Condition: Missing
- Location: Vacuum Pump
- Part time: 476 hours
- Component: Vacuum Pump, Rapco
- Component part number: 442W6
- Stage of operation: TX
- How discovered: O
- Nature of condition: S
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BSYA2009007

## Discrepancy

WHILE TROUBLESHOOTING AN ALTERNATOR PROBLEM MAINTENANCE FOUND THAT AT 2000 RPM ONLY HAD 3 INCH VAC PRESSURE.  FOUND THE VANE WEAR INSPECTION PLUG MISSING FROM VAC PUMP S/N D3497 TSN 475.7 RAPCO.  REMOVED AND REPLACED PUMP.

---
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.