# SDR ASAA2022122761240

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 26, 2022
- Submitted: December 27, 2022
- Operation: Air carrier
- Aircraft: [N581AS](https://openairdocs.org/aircraft/N581AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35188
- Aircraft time: 54,990 hours, 16,343 cycles
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Pressure Switch
- Part number: 21C1321
- Condition: Inoperative
- Location: Nr 2 Fuel Tank
- Stage of operation: IN
- How discovered: 9
- Nature of condition: P
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022122761240

## Discrepancy

#2 TANK AFT BOOST PUMP LOW PRESSURE LIGHT NOT ILLUMINATED WHEN SWITCH IN OFF POSITION. GROUNDED - YES. REMOVED AND REPLACED #2 TANK AFT BOOST PUMP PRESSURE SWITCH REF B737-800 AMM 28-42-11. OPERATIONAL TEST PASS REF AMM 28-42-11-700-801, AND LIGHT NOW ILLUMINATES WHEN SWITCH IN OFF POSITION. LEAK CHECK PASS. GROUND VERIFICATION TEST SUCCESSFUL.

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