20 July-19 August 2019

180
PISTON
LYCOMING O360 D3G –  ATA 7810 ENGINE COLLECTOR/TAILPIPE/NOZZLE – PISTON ENGINE – ROUGH RUNNING. DR 611954011
Rough running (vibration) experienced at full power at around 300ft AGL on climb coupled with drop of approximately 100 -150 rpm. Oil Temperatures and Pressures in the green, fuel pressure stable.

Root cause: Failed exhaust muffler. It is probable that a part of the muffler has temporarily caused a blockage with resultant power reduction. Muffler piece may then have discharged overboard.
Exhaust replaced.

CONTINENTAL IO520 –  ATA 7331 FUEL FLOW INDICATING  – CAP – LOOSE. DR 611954024
Fuel fumes in cabin when Aux fuel pumps or heater on.
Root cause: Fuel flow test/bleed line caps weeping fuel.
Removed, cleaned, inspected & refitted.  Tested serviceable.
LYCOMING IO360 M1A –  ATA 7414 MAGNETO/DISTRIBUTOR – COIL – FAILED. DR 611954037
Engine rough running in flight.

Root cause:  R/H Magneto secondary coil failure.

Replaced magneto.

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