# SDR UPS06446917

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2006
- Submitted: May 22, 2006
- Operation: Air carrier
- Aircraft: N521UP
- Make and model: Boeing 747211B
- Aircraft serial: 21944
- Aircraft time: 77,205 hours, 18,330 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Stiffener
- Part number: 65B0794114
- Condition: Cracked
- Location: Bs 280-300
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS06446917

## Discrepancy

NWW TOP PANEL BS280-300 RBL 10 STIFFENER RADIUS AREA FOUND CRACK APP 3/4".  NWW TOP PANEL BS280-300 RBL10 STIFFENER REPLACED AS PER SRM 51-10-01 PG9 AND INSTALLED AS PER SRM 51-30-02.

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