Major alteration

Major alteration means an alteration not listed in the aircraft, aircraft engine, or propeller specifications (1) That might appreciably affect weight, balance, structural strength, performance, powerplant operation, flight characteristics, or other qualities affecting airworthiness; or (2) That is not done according to accepted practices or cannot be done by elementary operations.

Source

14 CFR § 1.1

Scoping language

As used in this chapter