# SDR MK1Y20210519008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2021
- Submitted: May 19, 2021
- Operation: General aviation
- Filed by: [Bedek Aviation Group, repair station MK1Y325K](https://openairdocs.org/faa-repair-station/MK1Y325K/bedek-aviation-group.md) (OpenAirDocs)
- Aircraft: N521AZ
- Make and model: Boeing 767338
- Aircraft serial: 25576
- Aircraft time: 98,045 hours, 26,161 cycles
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Part number: 224M4761525
- Part serial: 3149001
- Condition: Corroded
- Location: Rt Nacelle
- Part time: 98,045 hours, 26,161 cycles
- 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/MK1Y20210519008

## Discrepancy

DURING MAINTENANCE INSPECTION FOUND LARGE PITTING CORROSION AREA ON ENGINE #1 R/H CORE COWL EXTERNAL SKIN BETWEEN 2-6 O'CLOCK AND FIVE CRACKS AT APP. 2 O'CLOCK BELOW THE PRECOOLER.

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