# SDR ASAA2023032442586

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2023
- Submitted: March 27, 2023
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 58,980 hours, 17,350 cycles
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 32913901
- Part serial: G5579
- Condition: Faulty
- Location: #1 Engine
- Part time: 60,484 hours, 28,108 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023032442586

## Discrepancy

REPLACE #1 TBV DUE TO HISTORY OF FAULTS. GROUNDED - YES. REPLACED J6 HARNESS REF 73-21-06. REPLACED TBV IN REF TO B737-800 AMM 75-23-01 LEAK OPS CHECK GOOD.

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