# SDR 2005FA0000468

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2005
- Submitted: April 8, 2005
- Operation: General aviation
- Aircraft: [N972PF](https://openairdocs.org/aircraft/N972PF), registered now
- Make and model: Raythn 390
- Aircraft serial: RB38
- Engine: Wilint FJ44
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Tuning Unit
- Part number: 3909740080005
- Condition: Broken
- Location: Flow Control
- Part time: 582 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000468

## Discrepancy

DURING REPLACEMENT OF LT BI-FLOW CONTROL VALVE IN CONJUNCTION WITH A SCHEDULED INSPECTION, FOUND PNEUMATIC TUBE IN LT PYLON AREA BENT AND CRACKED IN HALF.  SUSPECT MAY BE CAUSED DUE TO PREVIOUS ROUGH HANDLING OR FORCING TUBING DURING BI-FLOW VALVE REPLACEMENT OR RELATED MAINTENANCE IN AREA.  RECOMMENDED A MAINTENANCE PRECAUTION BE ADDED TO SEC 21-20-06-401 IN THE 390 MM ADVISING TECH TO HANDLE PNEUMATIC LINES IN THIS AREA WITH CAUTION.  (K)

---
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.