09/19/2026
Kenn Ricci says OEMs withholding wiring diagrams is against the law. He's not wrong about the rule.
14 CFR 21.50(b) requires type certificate holders to furnish complete Instructions for Continued Airworthiness to every owner — and make them available to anyone required to comply with them. Wiring diagrams are explicitly named in FAA guidance on what ICA must contain. For transport-category jets, 25.1729 and Appendix H go further and mandate FAA-approved ICA for the entire electrical wiring interconnection system.
The catch: the rule says "furnish" and "make available." It never says at what price, in what format, or how fast. That's the gap — and why ASA and ARSA have been asking the FAA to step in.
Full conversation on The VIP Seat.