# SDR UPS99231132

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N950UP](https://openairdocs.org/aircraft/N950UP), registered now
- Make and model: Boeing 727-25C
- Registry model: [Boeing 727-25C](https://openairdocs.org/model/boeing-727-25c) (OpenAirDocs)
- Aircraft serial: 19718
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Stiffner
- Condition: Corroded
- Location: 31-1
- 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/UPS99231132

## Discrepancy

INSPECTION TYPE:SI CORROSION (C53-111-01.00-01) ON SIDES OF E/E DOOR WARNING SWITCH COVER HOUSING.  REPLACED STIFFENER BS 450-452 LBL 10 TO RBL 13 AND DOOR SWITCH HOUSING SAME BS LBL 2 TO RBL 6 PER 727 SRM 51-30-2, 51-20-1, 51-30-5, 51-20-151 AMD MM 52-40-11.

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