Airworthiness

The FAA has issued an interpretation on the regulatory implications of service bulletins under part 43. Read it here (.pdf).

In a Notice of Proposed Rulemaking issued on February 15, 2005, the FAA proposed a change to 14 CFR section 21.183 that would limit the issuance of standard airworthiness certificates for "new" aircraft to those situations where (1) the applicant is (a) the type certificate (TC) holder (or its licensee) and (b) holds a production approval (production certificate or approved production inspection system), or (2) the aircraft is an import aircraft type-certificated under section 21.29.

Beyond those applicants described, the FAA would only issue a standard airworthiness certificate for used or surplus military aircraft.