# SDR UPS405557

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N691UP](https://openairdocs.org/aircraft/N691UP), registered now
- Make and model: Boeing 747121
- Aircraft serial: 19641
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Delaminated
- Location: Bs 1700-1720
- 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/UPS405557

## Discrepancy

WHILE IN AMS FOR C-CHECK MAINTENANCE REPORTED, FOUND DELAMINATION DUE TO CORROSION ON SKIN LAP SPLICE UNDER S-46 RT BETWEEN BS 1700/1720.  REMOVED EXISTING REPAIR PER SRM 51-30-02, REMOVED DELAMINATED PART OF OVERLAPPED SKIN BY EXTENDING CUTOUT TO BS 1695 AND REPAIRED LAP SPLICE IAW SRM 53-30-03 FIG 18.

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