# SDR ASAA2021080935766

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2021
- Submitted: August 24, 2021
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 27,617 hours, 8,829 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 32911867
- Part serial: GRTN2632
- Condition: Inoperative
- Location: Nr 2  Engine
- Part time: 26,426 hours, 8,480 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021080935766

## Discrepancy

GE DIAGNOSTICS REPORTS THE #2 ENGINE TREND DATA SHOWS A SUDDEN SHIFT IN DEGT, D CORE AND DFFHPTACCV IS MOST LIKELY CAUSE OF SHIFT. NO EXTENSION ALLOWED(#PRI: 2)ETOPS SIGNIFICANT SYSTEM. GROUNDED - YES. (RESOLVED ON W/O: 1882672 TASKCARD: N/R-00001 ) REMOVED AND REPLACED ENG #2 HPTACC REF B737-900 AMM 75-21-01. PERFORMED LEAK CHECKS, NO LEAKS REF AMM 71-00-00 TESA 3A. PERFORMED T/R TEST, NO DEFECTS REF AMM 75-21-01. SEAMC FELIX NOTIFED.

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