# SDR UPS04443234

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2004
- Submitted: October 4, 2004
- Operation: Air carrier
- Aircraft: N523UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 22381
- Aircraft time: 73,260 hours, 15,099 cycles
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Condition: Cracked
- Location: Nr 2 Pylon
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04443234

## Discrepancy

INSPECTION TYPE:AD, NR 2 PYLON UPPER LINK ATTACHMENT LUG AREA TOP SKIN 1 OFF CRACK FROM RIVET HOLE TOWARDS REAR AS RED MARKED (BS 221-221, WBL L470-L470).  TEMPORARY REPAIR CARRIED OUT PER EO B747-5430-21111-A.  STOP HOLE DRILLED AND NDT CONFIRM CRACK FREE.  THE ADDITION 2ND LAYER CRACK OF 0.06 INCH LENGTH.

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