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Home> Continental & Lycoming TroubleShoot
Worn impulse coupling and stop pins
1. Loose impulse coupling rivets (where applicable). 2. Soft flyweight material. 3. Improper lubrication. 4. Malfunctioning engine counterweights. (Continental SB 599D) 5. Old age. 6. Excessive torsional engine vibrations (the kind you cannot feel).
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On
a Lycoming engine when the impulse coupling fails the pieces fall into the
gears. This jamming of the gear train may cause the crankshaft gear to break off
the end of the crankshaft. When this happens all the accessories (magnetos) stop
working and your engine stops. If you're the type who practices "if it
ain't broke don't fix it" you end up with an accident since it don't break
on the ground!
Slipping
your chute and increasing your rate of descent is an excellent way to hasten
your progress out of the way of an enemy flyer's guns - and get yourself rapidly
so close to the ground that he can't follow you down. If he tries to, and flies
right into the ground, that's just too bad, Isn't it? Parachute Sense
US Navy 1944