# SDR ASAA2020012131921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2020
- Submitted: January 22, 2020
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 44,654 hours, 13,435 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 32911866
- Part serial: GRTV5622
- Condition: Faulted
- Location: Nr 1 Engine
- Part time: 32,176 hours, 9,475 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/ASAA2020012131921

## Discrepancy

GE REPORTS #1 ENGINE TREND DATA SHOW GRADUAL INCREASE IN DELTA EGT AND FUEL FLOW AND A DECREASE IN DELTA CORE SPEED.(#PRI2) ETOPS SIG. GROUNDED - YES. REMOVED AND REPLACED HPTACC VALVE PER B737-900 AMM 75-21-01. LEAK CHCK AND OPS TEST NORMAL.

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