# SDR ASAA2022122841364

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2022
- Submitted: January 3, 2023
- Operation: Air carrier
- Aircraft: [N402AS](https://openairdocs.org/aircraft/N402AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41189
- Aircraft time: 37,502 hours, 11,963 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 1821M60P04
- Part serial: GRTR9743
- Condition: Faulted
- Location: Nr 2 Engine
- Part time: 37,546 hours, 11,977 cycles
- Stage of operation: IN
- 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/ASAA2022122841364

## Discrepancy

REF ASA TASK CARD 78273000 FOUND ENGINE #2 FAULT MESSAGE. ENGINE 2 SHORT TIME FAULT. FAULT CODE 75-30602. THE TBV POSITION SIGNALS DISAGREE. GROUNDED - YES. REMOVED & REPLACED #2 ENG TBV PER B737-900 AMM 75-23-01.

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