"Steven P. McNicoll" wrote in message
ink.net...

"Jim Macklin" wrote in message
news:NVevf.40638$QW2.33692@dukeread08...

But that means there was "factory-CAA/FAA" approved
documentation for LIGHTS and AC43.13 includes FAA
instructions for "acceptable practices" to add a battery
box, generators, switches and such other items of equipment.
I did not say at any time that it was as simple as putting a
Ford rear end in a Chevy, but I also gave the current FAA
procedures for beginning the field approval process...
It begins with research of regulations, previously approved
installations of similar types, manufacturers assistance,
writing a manual and creation of checklists, maintenance
procedures and placards, getting approval and finally;
actually doing the modification and approving for "return to
service."


Actually, you pretty much did say that it was as simple as putting a Ford
rear end in a Chevy. You just substituted "alternator" and "generator"
for "Ford" and "Chevy". The point is a field approval is often not as
simple as you seem to believe.


It depends a great deal on HOW you go about it. I have averaged four or
five field approvals every year for the last ten or so years and never had
one fail to get approved the first time. You do have to get all of your
ducks in a row and make sure you use good data. It also helps to discuss
what you are trying to do with your PMI at the FSDO and make sure you pay
attention to the PMI's suggestions. Make sure you have your "Instructions
for Continued Airworthiness" in order and don't skip any of the sixteen
required entries. They can be done. I have done several alternator field
approvals.

Highflyer
Highflight Aviation Services
Pinckneyville Airport ( PJY )