# SDR ASAA2016030815838

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2016
- Submitted: March 10, 2016
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 14,998 hours, 4,372 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Manifold
- Part number: 3400276030
- Condition: Worn
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016030815838

## Discrepancy

NR 1 ENGINE TURBINE COOLING DUCT-Y HAS AREA OF HEAVY WEAR, CHAFING FROM CONTACT WITH C-DUCT HEAT SHIELD.  ACFT GROUNDED.  REPLACED NR 1 ENGINE TURBINE COOLING Y-DUCT, REF CFM56-7, ESM 720000430-006C60.

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