An aircraft alteration is classified as a 'major alteration' under FAR Part 43 Appendix A. What approval is required before returning the aircraft to service?
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A
Approval from the aircraft owner only
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B
FAA Form 337 approval by an FAA-authorized inspector or designated airworthiness representative (DAR)
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C
A logbook sign-off by any A&P mechanic
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D
Verbal approval from the local FSDO