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Old 01-17-2022, 01:31 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 8,554
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Mel has it right: far 1.1 is as clear as mud. (“A TSO is one way, but not the only way, to be approved”). Besides lighting, the faa has very publicly okayed adsb-out that is not TSO’d but with a manufacturer’s statement that it met the performance specs. And the faa is allowing non-TSO’d efis boxes on normally certified aircraft. etc. So if you are rolling your own lights and want to CYA you might write a note in your maintenance records that you compared your lights to those on a Cessna (for example), and yours were at least as bright or brighter, at all required angles, were the proper color, etc.
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