# SDR P5CA0601436

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2006
- Submitted: February 7, 2006
- Operation: Air carrier
- Aircraft: [N509MC](https://openairdocs.org/aircraft/N509MC), registered now
- Make and model: Boeing 747230B
- Aircraft serial: 21221
- Aircraft time: 115,341 hours, 21,960 cycles
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Pressure Switch
- Condition: Failed
- Location: Boost Pump
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA0601436

## Discrepancy

NR 4 MAIN AFT BOOST PUMP FAILED.  ITEM DEFERRED PER MEL 28-01-C.  CHANGED NR 4 FUEL AFT BOOST PUMP PRESSURE SWITCH IAW MM 28-42-01.  TEST OK.

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