# SDR QXEA2008121001206

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 25, 2008
- Submitted: December 10, 2008
- Operation: Air carrier
- Aircraft: N412QX
- Make and model: Bombdr DHC8402
- Aircraft serial: 4059
- Aircraft time: 17,758 hours, 17,908 cycles
- System (JASC): [7210 · Turbine Engine Reduction Gear](https://openairdocs.org/jasc/7210)
- Part: Mount
- Condition: Corroded
- Location: Rgb
- 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/QXEA2008121001206

## Discrepancy

PDX - C4 - NR 1 ENGINE REDUCTION GEARBOX HAS PITTING CORROSION AT TOP CENTER MOUNT ATTACH POINT BETWEEN MOUNT AND GEARBOX MATING SURFACE AROUND ALL 4 MOUNT BOLTS.  REMOVED FWD TOP ISOLATER MOUNT IAW Q400 AMM 71-21-11-000-801, LOOSENED LT AND RT FWD ISOLATOR ASSYS.  REMOVED LT NACELLE DOORS.  MAPPED FOR ENGINEERING.  REPAIRED MATING SURFACE OF 31 ENG FWD TOP ISOLATOR MOUNT IAW D8 400 AMM 71-21-11-400-801.

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