# SDR ASAA2021120836869

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2021
- Submitted: December 22, 2021
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 54,261 hours, 16,210 cycles
- System (JASC): [2897 · Fuel System Wiring](https://openairdocs.org/jasc/2897)
- Part: Relay
- Part number: KDAGX4F001
- Condition: Intermittent
- Location: Boost Pump
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021120836869

## Discrepancy

#2 FUEL SYSTEM MAIN TANK FORWARD LOW PRESSURE ILLUMINATED WITH SWITCH IN ON POSITION. GROUNDED - YES. VERIFIED INTERMITTENT VOLTAGE AT CONNECTOR D76 AND SWITCH S6 OPERATES NORMALLY. REMOVED AND REPLACED GFI RELAY R21 OP CK GOOD REF B737-800 AMM 28-22-41. #2 FWD PUMP LIGHT NOW GOES OFF WITH SWITCH ON.

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