# SDR ASAA2021030534263

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2021
- Submitted: March 11, 2021
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 51,531 hours, 15,386 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Pressure Switch
- Part number: 8TJ201NAA1
- Part serial: YY0980220
- Condition: Failed
- Location: #2 Engine Fuel
- Part time: 10,392 hours, 2,108 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021030534263

## Discrepancy

#2 FILTER BYPASS ILLUMINATED DURING PUSHBACK/ENGINE START. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE FUEL FILTER DIFFERENTIAL PRESSURE SWITCH REF B737-800 AMM 73-34-01. REMOVED AND REPLACED #2 ENGINE J8 WIRE HARNESS REF AMM 73-21-06. ALL TESTS PASS. LEAK CKS GOOD. #2 FUEL FILTER BYPASS LIGHT OPS CKS GOOD. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.

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