hotrod150 wrote:I wouldn't think that getting a field approval for a radio installation would be too hard, IF your local FAA PMI is a good guy. It's not quite the same thing as dropping a 327 Chevvy engine into your Taylorcraft... but some FAA types (and A&P/IA's) just hear "field approval" and that's all she wrote. I think besides having to do a "field approval" 337 (needs FAA sign-off) instead of a (major) alteration 337 (needs IA sign-off), the only problem with a non-TSO radio is that it can't be certified for IFR use. This is what a couple A&P/IA friends told me anyway.
Eric
I have looked into using a non-TSO radio but never could get a straight anwser on what I needed to do to make it legal...seemed nobody really knew and would just say submit a 337 and get the feds blessing. Sure that is simple enough if you want to deal with it.
I could be totally outta wack here but my plane was certified under CAR 4a, which has no radio requirement for NAC (non-aircarrier) planes operated in VFR, has no radio requirement on the TC, and I can't find where the FARs say a radio used for VFR has to be TSOd:
121.345 Radio equipment.
(a) No person may operate an airplane unless it is equipped with radio equipment required for the kind of operation being conducted.
121.347 Communication and navigation equipment for operations under VFR over routes navigated by pilotage.
(a) No person may operate an airplane under VFR over routes that can be navigated by pilotage unless the airplane is equipped with the radio communication equipment necessary under normal operating conditions to fulfill the following:
(1) Communicate with at least one appropriate station from any point on the route;
(2) Communicate with appropriate air traffic control facilities from any point within Class B, Class C, or Class D airspace, or within a Class E surface area designated for an airport in which flights are intended; and
(3) Receive meteorological information from any point en route by either of two independent systems. One of the means provided to comply with this subparagraph may be used to comply with paragraphs (a)(1) and (2) of this section.
(b) No person may operate an airplane at night under VFR over routes that can be navigated by pilotage unless that airplane is equipped with—
(1) Radio communication equipment necessary under normal operating conditions to fulfill the functions specified in paragraph (a) of this section; and
(2) Navigation equipment suitable for the route to be flown.
So why is it that I need a TSO radio? I am totally fine with having to get a TSOd radio...I'd just like to know where it says it has to be TSO.