# SDR EE4Y2018041906384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2018
- Submitted: April 19, 2018
- Operation: Air carrier
- Aircraft: N306GT
- Make and model: Boeing 737-400
- Registry model: [Boeing 737-400](https://openairdocs.org/model/boeing-737-400) (OpenAirDocs)
- Aircraft serial: 27157
- Aircraft time: 53,992 hours, 29,261 cycles
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Cracked
- Location: Lt 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/EE4Y2018041906384

## Discrepancy

DURING THE ACCOMPLISHMENT OF SRM 57-20-10, REPAIR 4, FOUND THE LT WING UPPER SKIN, TWO FASTENER HOLES CRACKED.  ONE FASTENER HOLE LOCATED AT FASTENER ROW 1, SPECIFICALLY AT WBL 181.4, IT WAS REPAIRED IAW SRM B737-57-20-10, REPAIR 7.  THE OTHER FASTENER HOLE LOCATED AT FASTENER ROW 2, SPECIFICALLY AT WBL 145 WAS REPAIRED IAW SR 3-4194343343.

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