# SDR UPS203112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N920UP](https://openairdocs.org/aircraft/N920UP), registered now
- Make and model: Boeing 727180C
- Aircraft serial: 19873
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Condition: Corroded
- Location: Fs 335
- 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/UPS203112

## Discrepancy

WHILE IN C-CHECK, MAINTENANCE FOUND CORROSION ON THE OUTBOARD FLANGE OF THE UPPER VERTICAL STIFFENER AT STATION 335, RBL 15 AND WL 178.  MAINTENANCE REPLACED THE STIFFENER PER SRM 51-30-2, 51-10-1 AND 51-30-5.

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