# SDR 98UAL900559

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N196UA
- Make and model: Boeing 747422
- Aircraft serial: 28715
- Engine: Pwa PW4056
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Pump
- Part number: 6072101
- Condition: Damaged
- Location: Center Wing
- Component: Crane  Hydro, 6072101
- Stage of operation: NR
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98UAL900559

## Discrepancy

FUEL OVERRIDE/JETTISON PUMP PART NR 60-72101 DASH 1 RECOVERED FROM THE CENTER WING FUEL TANK OF ACFT 8496 WAS FOUND TO EXHIBIT EXCESSIVE IMPELLER END-PLAY AND GOUGING OF THE IMPELLER UNIT WITH THE INLET ADAPTER.  THE THRUST WASHER/BEARING IS SUSPECTED TO HAVE BEEN MANUFACTURED INCORRECTLY.  ROOT CAUSE OF FAILURE HAS NOT BEEN IDENTIFIED AS YET.

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