# SDR ASAA2023012141609

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2023
- Submitted: January 24, 2023
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 31,796 hours, 10,100 cycles
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Switch
- Part number: 21C1321
- Condition: Faulty
- Location: Mlg Wheel Well
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023012141609

## Discrepancy

FOLLOW UP TO HISTORY OF #1 TANK AFT PUMP LOW PRESSURE LIGHT NOT ILLUMINATING. GROUNDED - YES. REMOVED AND REPLACED #1 TANK AFT PUMP PRESSURE SWITCH REF. B737-900 AMM 28-42-11.

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