# SDR KCSA202105191061

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2021
- Submitted: May 20, 2021
- Operation: Air carrier
- Aircraft: [N743CK](https://openairdocs.org/aircraft/N743CK), registered now
- Make and model: Boeing 747446
- Aircraft serial: 26350
- Aircraft time: 109,679 hours, 17,491 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar
- Condition: Cracked
- Location: Rt Wing
- Stage of operation: IN
- How discovered: E
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA202105191061

## Discrepancy

WHILE ACCOMPLISHING AD 2017-09-10(G) AND SB 747-57A2357 OR R/H, INDICATION OF CRACK WAS FOUND ON RIGHT WING FRONT SPAR AS FSSI 655 IN WEB 1/4" BELOW UPPER CHORD REFERENCE WO743009293 FOR ORIGINATING WORK

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