# SDR UPS06447025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2006
- Submitted: June 2, 2006
- Operation: Air carrier
- Aircraft: N521UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 21944
- Aircraft time: 77,205 hours, 18,330 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar
- Part number: 65B01035
- 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/UPS06447025

## Discrepancy

INSPECTION TYPE:C LT WING FRONT SPAR UPPER CHORD WS 642 AREA FOUND 1EA HOLE CRACK AT WEB RUNNING O/B APPROX .0625 INCH LONG.  LT WING FRONT SPAR UPPER CHORD WS 642 WEB REPAIRED AS PER RS R57-21-35488.  INSPECT THE FRONT SPAR IN ZONE-A AS PER SB 747-57A2311 R2 TABLE 3 WITH REPEAT INSPECTION INTERVALS OF 1600 FLIGHT CYCLES OR 6200 FLIGHT HOURS WHICHEVER IS EARLIER.

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