# SDR UPS06446219

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2006
- Submitted: February 22, 2006
- Operation: Air carrier
- Aircraft: N522UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 21936
- Aircraft time: 72,217 hours, 16,929 cycles
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Condition: Cracked
- Location: Nr 4 Pylon
- 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/UPS06446219

## Discrepancy

INSPECTION TYPE:C NR 4 PYLON - SKIN / DOUBLER CRACKED FOUND 3EA FASTENER HOLES ON LEFT LWR EDGE BESIDE AFT UPPER ENG MOUNT FITTING NAC STA 220, (CRACK LENGTH .5 INCH).  NR 4 PYLON LEFT LOWER EDGE SKIN REPAIRED AS PER SRM 54-34-03 FIG 24.  AFTER STOP HOLES DRILLED CRACK FREE CONFIRMED BY NDT INSPECTION AS PER NTM PT6 51-00-00 FIG 4.

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