Electrical Failure on Take Off

[Pete Somers]

There you go Dale,
Saw this problem on a 337G a while ago and the alternators going off line was more that likely caused by FOD going thru the rear alternator, caused a short inside the alternator for a second but enough time to cause a Hi volts which took out both alternators.
The rear 35A circuit breaker had popped and the HI/LO sensor had been damaged.
The circuit breaker was restored and the alternators ran fine, but the DIS light was on all the time. The HI/LO sensor was replaced and the system check out ok.

BTW a search of the rear engine bay was done nothing found, a look at the alternator turned up the same.

Glad to hear everything ok

Pete Somers

[bking]

Can anyone please tell me where is the Hi/Low sensor located?

[Kim Geyer]

On a T337H they are located under the pedestal cover on the right side

[JimC]

Item 32 (upper left, Detail F) in this drawing of 1970-73 planes.

What make & model do you have?

[bking]

My Skymaster is a 1974 model, s/n 1563.

[JimC]

Item 30 in detail C for s/n 1563.

[bking]

Jim and Kim thank you for the help.