SDR QXEA2008121001206

Service difficulty report · Mount · Bombdr DHC8402

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
Part: Mount
Condition: Corroded
Location: Rgb
Stage of operation: IN
How discovered: 9
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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.