# SDR ASAA2023021642145

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2023
- Submitted: March 3, 2023
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 52,557 hours, 15,444 cycles
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 32911867
- Part serial: GRTM3283
- Condition: Faulty
- Location: #2 Engine
- Part time: 70,267 hours, 27,419 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/ASAA2023021642145

## Discrepancy

CFM REPORTS #2 ENGINE GRADUAL INCREASE IN DELTA EGT AND DELTA FUEL FLOW AND DECREASE IN DELTA CORE SPEED. GROUNDED - YES. REMOVED AND REPLACED HPTACC ACTUATOR ASSY PER B737-800 AMM 756-25-05.

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