Why Warren Won't...
Buffett generally avoids companies with a relationship to what he already owns. BBD sells aircraft to Berhshire's Netjets. PCP supplies engine castings to GE and Honeywell which sell them to jet aircraft manufacturers like BBD. It's a complicated affair. But the fact that BRK's NetJets has large contracts for Globals from BBD can be taken as some indication of their confidence in BBD.