Hello Dan, Thanks for contacting AOPA's Pilot Information Center!
There is no requirement that you use TSO'd equipment. That said, however, if parts are non-TSO'd a mechanic will have to sign off on each part installed that it is at least as good as, if not better than the TSO. Unless a mechanic manufactures the part himself, chances are he won't sign off on it because there is no way of knowing. Non-TSO'd parts and equipment are primarily for use in experimental aircraft because builders have the freedom to perform maintenance without the help of an A&P. I recommend you stick with TSO'd equipment unless you can find a mechanic to signoff on the parts being superior to the standard parts. If you have further questions, feel free to call us at 800/872-2672. Best regards, Sean Collins, Aviation Technical Specialist AOPA Government Affairs -- Pilot Information Center Tel: 800.872.2672 or 301.695.2000 Web: www.aopa.org
