# SDR ASAA2021040334502

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2021
- Submitted: April 12, 2021
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 27,799 hours, 8,974 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Valve
- Part number: 32911867
- Part serial: GRTN6155
- Condition: Leaking
- Location: Nr 2 Hpt
- Part time: 24,807 hours, 8,099 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021040334502

## Discrepancy

DURING ENG RUN REF L/P 60093274, FOUND HPTACC VALVE DRAIN DRIPPING. GROUNDED - YES. FOUND DRAIN LEAKING 4 DRM REF B737-900 AMM 71-21-00-200-801-F00 FIM 605. REMOVED AND REPLACED #2 ENG HPTACC VALVE IAW AMM 75-21-01, OPS CHECK GOOD, LEAK CHECK GOOD. NO FURTHER DEFECTS NOTED.

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