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#1
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Don't forget to clean the connections going to the diode board and the voltage regulators as these tend to be exposed. Clean every blade connector you can find in the cct. esp. the ones at the battery and alternator switches. They may look clean but if you scrape them you will see they are likely coated with a thin layer of corrosion, especially if somebody combined copper and aluminum connectors (yielding galvanic corrosion). All these slight increases in resistance are enough to keep the alternators offline.
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#2
06-08-15, 04:52 PM
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Thanks James & Karl. Appreciated.
We got it going today but we are not sure why. Which means that the probability of repeat failure is pretty good. We bridged out the field circuit breaker and proved it was not that. Finger of suspicion now rests on the alternator switch. Much cleaning of terminals in confined spaces in 33dC heat is not fun. Old aircraft! Sigh!
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#3
06-19-15, 06:08 PM
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After it happened to me (and a problem with the landing gear horn sounding) I cleaned every blade and banana plug type connector I could find in the acft. Lots of fun. Battery switch is prone to internal resistance build up with minor internal contact arcing over the years also. Easy to replace both the batt and alternator switches - replaced mine.
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