# SDR UPS96805887

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N688UP](https://openairdocs.org/aircraft/N688UP), registered now
- Make and model: Boeing 747-SR-46
- Registry model: [Boeing 747-SR-46](https://openairdocs.org/model/boeing-747-sr-46) (OpenAirDocs)
- Aircraft serial: 20784
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hyd Line
- Condition: Leaking
- Location: Nr 3 Engine
- Stage of operation: AP
- Nature of condition: K, B
- Precautionary procedure: G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS96805887

## Discrepancy

FLIGHT CREW REPORTED, ON FINAL APPROACH THE A/C FILLED WITH SMOKE.  SKYDROL INDUCED INTO THE PNEUMATIC SYSTEM DUE TO CHAFED LINE AND DUCT.  FOUND PNEUMATIC LINE CHAFING AGAINST EDP HYD LINE IN L/E ABOVE NR 3 ENGINE.  REPAIRED PNEUMATIC DUCT IAW FAA FORM 8130-3.  DUCT WAS REWELDED, INSTALLED INTERM REPAIR PER GMM 3-24-2.

---
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.