# SDR 98UAL900075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7260U
- Make and model: Boeing 727222
- Aircraft serial: 21407
- Engine: Pwa JT8D15
- System (JASC): [8011 · Engine Starter](https://openairdocs.org/jasc/8011)
- Part: Bearing
- Part number: 505422
- Condition: Failed
- Location: Starter Drive
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98UAL900075

## Discrepancy

NR 1 ENGINE OIL PRESSURE LIGHT ILLUMINATED AND OIL PRESSURE INDICATED ZERO.  SHUT DOWN ENGINE AND DIVERTED TO OMA.  *S/D*  THE STARTER DRIVE BALL BEARING CAGE FAILED.  ONE BALL WAS INGESTED INTO THE MAIN OIL PUMP RESULTING IN A SHEARED SHAFT AND ZERO OIL PRESSURE.  BEARING THRESHOLD LIMITS HAVE BEEN IMPLEMENTED TO  PREVENT SUCH FAILURES IN THE FUTURE.

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