# SDR DALA2021040501992

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2019
- Submitted: April 5, 2021
- Operation: Air carrier
- Aircraft: [N727TW](https://openairdocs.org/aircraft/N727TW), registered now
- Make and model: Boeing 757231
- Aircraft serial: 30340
- Aircraft time: 73,055 hours, 18,061 cycles
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Cracked
- Location: Rt Wing
- 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/DALA2021040501992

## Discrepancy

SHIP 6813 WHEN PERFORMING THE INSPECTIONS REQUESTED PER WC 5720-01100-0101B, CRACKS WERE FOUND ON THE BOREHOLES OF THE RHS WING UPPER SKIN HOLES #2, 4, 5, 12, 13, 16, 17 & 18, COMMON TO THE PYLON SUPPORT DRAG FITTINGS. SUBSEQUENTLY, CRACKS WERE REMOVED BY CONCENTRICALLY REAMING HOLES #12, 16 & 18, AND INSTALLING OVERSIZE FASTENERS ON THOSE LOCATIONS. CORRECTIVE ACTION: REF ERA 584089-14 REV A. (1425497)

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