Mounting the Alternator Voltage Regulators

The airplane has two alternators (primary and standby). The larger primary runs off a drive belt while the smaller standby alternator is mounted on the accessory drive pad on the engine. They are B&C alternators so they each have an external voltage regulator. Many people mount the regulator(s) in the engine compartment on the firewall. B&C actually recommends they be mounted away from heat, moisture and vibration. Jon and I decided to put them in the “pit” on the backside of the firewall. Much cooler and drier and presumably less vibration in this location — but more difficult to get to if maintenance is necessary.

I will move the engine oil pressure sensor line on the front side of the firewall which has a minor interference with one of the bolts used to mount the primary alternator voltage regulator.

4 Hours (2 people x 2 hours)

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