# SDR ASAA2023090144934

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2023
- Submitted: September 5, 2023
- Operation: Air carrier
- Aircraft: [N514AS](https://openairdocs.org/aircraft/N514AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35193
- Aircraft time: 53,516 hours, 15,812 cycles
- System (JASC): [2800 · Aircraft Fuel System](https://openairdocs.org/jasc/2800)
- Part: Pressure Switch
- Part number: 21C1321
- Condition: Faulty
- Location: Center Tank
- Stage of operation: NR
- How discovered: V
- Nature of condition: P
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023090144934

## Discrepancy

CENTER TANK RIGHT FUEL PUMP LOW PRESSURE LIGHT DOES NOT ILLUMINATE AFTER FUEL IS EXHAUSTED FROM THAT TANK. FUEL PUMP APPEARED TO OPERATE NORMALLY AND FUEL BURN WAS AS EXPECTED. GROUNDED - YES. PERFORMED INITIAL EVALUATION OF FIM 28-22 TASK 821, PUSH-TO-TEST LIGHT OPERATES, AND CTR R PUMP OPERATES WITH SWITCH ON. PER FIM, REMOVED AND REPLACED R/H CENTER FUEL BOOST PUMP PRESSURE SWITCH, REF B737-800 AMM 28-42-11/401. GROUND VERIFICATION SUCCESSFUL.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.