Bendix mag issues

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6643
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Joined: Tue May 01, 2018 7:00 am
Name: John C
Location: KLCI, NH
Aircraft Type: 1946 C140/C90
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Re: Bendix mag issues

Post by 6643 »

Is the cam slipping on the shaft?
4004
Posts: 243
Joined: Tue May 01, 2018 7:00 am
Name: Edd
Location: KFGU TN
Aircraft Type: 140
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Re: Bendix mag issues

Post by 4004 »

Is the wicking for cam lubrication ok - finger nail test - OH shop would have checked. Is the Time Rite the one with the mechanical arm and sliding scale - I have one if that's it but I quit using it years ago. I use a digital with a similar name IIRC. Rubbing block on points worn down, again, shop should have caught but that would cause limitation to point adjustment. Since you had problem with cam, possibly change cam and new points. Obviously, if you have been operating since 2014 until now with normal operation, mag drop, etc. something has slipped or worn. How many hours on mag since OH?
7645
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Name: Silas
Location: Southern Maryland
Aircraft Type: 120
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Re: Bendix mag issues

Post by 7645 »

Update from the mag shop:

The cam wasn't soaked in an oil bath during previous overhaul and was causing premature cam follower wear. The tech also noted several "new", but obsolete parts used during the overhaul. Sending both for inspection/repair.

Silas
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