# SDR P5CA0401116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 2004
- Submitted: July 12, 2004
- Operation: Air carrier
- Aircraft: N505MC
- Make and model: Boeing 747-2D3B
- Registry model: [Boeing 747-2D3B](https://openairdocs.org/model/boeing-747-2d3b) (OpenAirDocs)
- Aircraft serial: 21251
- Aircraft time: 86,682 hours, 19,015 cycles
- Engine: Ge CF650E2
- Engine time: 73,061 hours, 15,720 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Condition: Malfunctioned
- Location: Nr 1 Engine
- 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/P5CA0401116

## Discrepancy

ON ENGINE START-UP NR 1 ENGINE PYLON VALVE WILL NOT OPEN DURING MANUAL ENGINE START.  REPOSITIONED PYLON VALVE IN ORDER TO ACHIEVE ENGINE START, OPS CHECK GOOD IAW MM 36-11-04.

---
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.