# SDR 2007UALA02729

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2007
- Submitted: July 20, 2007
- Operation: Air carrier
- Aircraft: [N107UA](https://openairdocs.org/aircraft/N107UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 26900
- Aircraft time: 36,489 hours, 4,540 cycles
- Engine: Pwa PW4056
- System (JASC): [5415 · Nacelle/Pylon, Attach Fittings](https://openairdocs.org/jasc/5415)
- Part: Structure
- Condition: Corroded
- 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/2007UALA02729

## Discrepancy

CORROSION FOUND ON NR 4 PYLON DSB OUTBOARD WING FITTING, 4 EACH ECCENTRIC BUSHINGS AROUND SURFACE, & 4 EACH DSB BEARINGS.   [08-14-07]   CORROSION FOUND ON NR 4 PYLON DUAL SIDE BRACE OTBD WING FTNG, 4 EACH ECCENTRIC BUSHINGS AROUND SURFACE, & 4 EACH DSB BEARINGS. CORROSION REMOVED REF MM 54-45-98.  MODIFICATION ACCOMPLISHED TO CORRECT CORROSION PROBLEM.

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