Non TSO'd Instruments

How to keep the Cessna 170 flying and airworthy.

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nippaero
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Joined: Mon Mar 14, 2016 1:05 am

Non TSO'd Instruments

Post by nippaero »

In the hanger today we were talking about non-TSO'd instruments. I have been reading through several forums online and there seems to be a lot of confusion on the subject. I am looking for the regulatory reference if it required for part 91. Basically, could I put a Falcon altimeter in my 170?

I saw FAA Order 8900.1 which does not appear to apply to part 91. Since the 170 was manufactured under CAR-3 the original instruments on the MEL were not TSO'd.

FAR 91.205 does not require any of the instruments to be TSO’d.

FAA approval is still required to install equipment in a certified production aircraft per FAR Part 21 with a 337 (No reference to TSO).

What am I missing here?
1952 170B
N8180A s/n 25032
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