# SDR 2001UALA00874

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2001
- Submitted: June 7, 2001
- Operation: Air carrier
- Aircraft: [N669UA](https://openairdocs.org/aircraft/N669UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30025
- Aircraft time: 6,671 hours, 2,187 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Controller
- Condition: Malfunctioned
- Location: Pneumatic Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2001UALA00874

## Discrepancy

RT DUCT PRESSURE FLUCTUATES DURING DESCENT, WITH ENG RUNNING, LT & RT ISOL VLVS CLSD, AND BLD SW ON.  DUCT PSI FLUCTUATES.  ETOPS VERIFICATION FLIGHT, RTF.

---
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.