# SDR 0001526634

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2000
- Submitted: May 8, 2000
- Operation: Air carrier
- Aircraft: [N634US](https://openairdocs.org/aircraft/N634US), registered now
- Make and model: Boeing 747227B
- Aircraft serial: 22234
- Aircraft time: 64,418 hours, 9,711 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/0001526634

## Discrepancy

DURING M CHECK, FOUND CRACK IN 3 INCH LONG CRACK ON NR 4 PYLON SKIN INBOARD SIDE, FORWARD OF SLOT SEAL AT APPROX NAS STATION 173.  REPAIRED PER EA66-175083.

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