# SDR UIEA2012041200121

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2012
- Submitted: April 12, 2012
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 53,605 hours, 8,032 cycles
- System (JASC): [5720 · Wing Miscellaneous Structure](https://openairdocs.org/jasc/5720)
- Part: Web
- Part number: 65B11154416
- 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/UIEA2012041200121

## Discrepancy

WHILE DOING AN "A" CHECK INSPECTION OF THE RT WING FIXED T/E INBD SPOILERS SUPPORT RIBS, A 1.5 INCHES LONG CRACK WAS FOUND ON THE WEB OF THE INBD SUPPORT RIB ASSY AT WBL 255.692.  THE DAMAGE EXCEEDED THE LIMITS OF THE SRM 57-51-02, FIGURE 101.   CRACK REPAIRED IAW SRM 51-70-13, REPAIR 1.

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