# SDR ASAA2019030928596

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2019
- Submitted: March 14, 2019
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 20,156 hours, 6,609 cycles
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Pump
- Part number: 607551005
- Part serial: 011457853
- Condition: Failed
- Location: Fuel System
- Part time: 20,157 hours, 6,608 cycles
- Stage of operation: NR
- 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/ASAA2019030928596

## Discrepancy

RIGHT MAIN FUEL TANK AFT PUMP SHOWS LOW PRESSURE LIGHT ILLUMINATED - SWITCH ON - FUEL IN TANK. GROUNDED - YES. REMOVED AND REPLACED R20 RELAY REF WDM 28-23-11/3.  REPLACED NR 2 AFT FUEL PUMP PRESSURE SWITCH REF AMM 28-42-11. REPLACED NR 2 AFT FUEL BOOST PUMP REF AMM 28-22-41. RT AFT BOOST PUMP OPS NML REF AMM 28-22-00. P91 PANEL DC SYS.

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