# SDR 97UAL900303

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N153UA
- Make and model: Boeing 747123
- Aircraft serial: 20102
- Engine: Pwa JT9D7A
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Gear Shaft
- Part number: 80465801
- Condition: Worn
- Location: Nr 2 Engine Gb
- Stage of operation: CR
- Nature of condition: Y, J
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900303

## Discrepancy

NR 2 ENGINE OIL PRESSURE DROPPED TO ZERO ACCOMPANIED WITH A LOW PRESSURE WARNING LIGHT.  ENGINE WAS SHUTDOWN AND AIRCRAFT RETURNED TO FIELD.  *S/D*  GEAR TEETH OF GEAR SHAFT ASSEMBLY WORN.  REPLACED ENTIRE ENGINE, OPERATION CHECKS NORMAL.

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