# SDR UPS05445652

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2005
- Submitted: October 28, 2005
- Operation: Air carrier
- Aircraft: N681UP
- Make and model: Boeing 747121
- Aircraft serial: 19661
- Aircraft time: 106,207 hours, 26,971 cycles
- Engine: Pwa JT9D3
- System (JASC): [5410 · Nacelle/Pylon, Main Frame](https://openairdocs.org/jasc/5410)
- Part: Link
- Part number: 65B903604
- Part serial: 8ET366
- Condition: Cracked
- Location: Nr 4 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/UPS05445652

## Discrepancy

AD NR 4 PYLON REAR ENGINE MOUNT THRUST LINK FWD END LUG FOUND CRACK INDICATION EXCEEDED LIMIT.   NR 4 PYLON REAR UPPER ENGINE MOUNT AFT THRUST LINK ASSY CHANGED AND INSTALLED IAW MM 71-21-03.

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