# SDR UPS02437413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2002
- Submitted: January 16, 2002
- Operation: Air carrier
- Aircraft: [N671UP](https://openairdocs.org/aircraft/N671UP), registered now
- Make and model: Boeing 747123
- Aircraft serial: 20323
- Aircraft time: 73,888 hours, 20,926 cycles
- System (JASC): [5714 · Wing, Center Box](https://openairdocs.org/jasc/5714)
- Part: Structure
- Condition: Corroded
- Location: Wing Box
- 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/UPS02437413

## Discrepancy

INSPECTION TYPE:SP CENTER WING BOX UPPER SKIN HAS EXFOLIATION CORROSION APPROX 4 INCHES IN DIAMETER STA 1110, RBL 104.  REPAIRED AREA IAW ENGINEERING FILE 747-57-20016.

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