Contact your FSDO for the best advice to change the airworthiness
certificate. But, perhaps the brake mod at least, could be done as a
field approval. Ask your mechanic about that.

On 2/27/2017 9:10 AM, ZZ wrote:
I have a PIK20B which has a Standard Airworthiness certificate. I want to change the AWC to Experimental Air Racing to facilitate two modifications: changing the drum brake to a hydraulic disk type and possibly the addition of winglets.

I would appreciate any advice and/or opinions from those who may have gone through this AWC change process.

Many thanks in advance,

Paul
ZZ

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Dan, 5J