# SDR ASAA2022111640945

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2022
- Submitted: November 28, 2022
- Operation: Air carrier
- Aircraft: [N972AK](https://openairdocs.org/aircraft/N972AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43389
- Aircraft time: 2,574 hours, 749 cycles
- Engine: Cfmint LEAP1B28
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 2460M52P08
- Part serial: WCPBE554
- Condition: Faulted
- Location: Nr 1 Cooling
- Part time: 2,668 hours, 777 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022111640945

## Discrepancy

REF T/C 05-020-01 FOUND SMT ENG 1 EEC C1 FAULT LOGGED. CORRELATED MSG CODE 73-42771 & 73-42772. GROUNDED - YES. REMOVED AND REPLACED MODULATED TURBINE COOLING VALVE PER B737-9 AMM 75-23-02. OPS CHECK GOOD. ALL FAULT MESSAGES CLEARED NO CURRENT ACTIVE FAULTS.

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