# SDR 99ZZZX336

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N983US
- Make and model: Doug DC-9-32
- Registry model: [Doug DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32) (OpenAirDocs)
- Aircraft serial: 47282
- Engine: Pwa JT8D1
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Chip Collector
- Part number: B7670
- Condition: Failed
- Location: Nr 4 Engine
- Stage of operation: NR
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX336

## Discrepancy

CHIP COLLECTOR ON RIGHT ENGINE, NR 4 BEARING SCAVENGE LINE, CHIP COLLECTOR MAGNETIC PROBE EJECTED FROM CHIP COLLECTOR BODY.  ENGINE OIL DRAINED FROM ENGINE IN-FLIGHT.  ANALYSIS DETERMINED THE INTERNAL CHECK VALVE OF CHIP COLLECTOR WAS STUCK IN THE OPEN POSITION DUE TO DEBRIS LODGED BETWEEN THE INTERNAL CHECK VALVE AND COLLECTOR'S INTERNAL BORE.

---
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.