# SDR DLL14991925

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N741DA
- Make and model: Lkheed 1011385115
- Aircraft serial: 193C1245
- System (JASC): [5720 · Wing Miscellaneous Structure](https://openairdocs.org/jasc/5720)
- Part: Stiffener
- Part number: 1556399101
- Condition: Cracked
- Location: Bs 983
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DLL14991925

## Discrepancy

THE RBL 22.5 VERTICAL STIFFENER ON THE CENTER WING FRONT    SPAR (FS 983) WAS FOUND WITH A TYPICAL CRACK EMANATING FROM A LIGHTENING HOLE IN THE STIFFENER WEB NEAR THE UPPER  END.  THE STIFFENER WAS REMOVED AND REPLACED WITH A NEW STIFFENER MANUFACTURED WITHOUT LIGHTENING HOLES PER ER/A 368106-14AD.

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