# SDR UPS06446970

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2006
- Submitted: May 30, 2006
- Operation: Air carrier
- Aircraft: N521UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 21944
- Aircraft time: 77,205 hours, 18,330 cycles
- System (JASC): [5411 · Nacelle/Pylon, Frame/Spar/Rib](https://openairdocs.org/jasc/5411)
- Part: Attach Angle
- Part number: 65B90366600
- 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/UPS06446970

## Discrepancy

INSPECTION TYPE:C NR 4 PYLON NAC STA 221.9 REAR ENG MOUNT B/H UPPER OF MID SPAR WEB ATT T-ANGLE FOUND CRACKED JUST AT O/B SIDE.  CRACK LENGTH 1.75 INCH.  NR 4 PYLON NAC STA 221.9 REAR ENG MOUNT B/H UPPER OF MID SPAR WEB ATT T-ANGLE REPAIRED AS PER SRM 51-40-04 FIG 1.

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