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Home YOU US What We Can Do What We Have Done - On Learjets Why ASTECH ASTECH's Founder Expert's Corner - FAA STC Process Links In Closing	CHAPTER 3. APPLICABLE REGULATIONS 3-1. GENERAL 3-2. CERTIFICATION BASIS 3-3. AVAILABILITY OF REGULATIONS 3-4. REGULATIONS MOST COMMONLY USED FOR STC APPLICATIONS
	3-1. GENERAL. Each Type Certificated U.S. aircraft, engine, or propeller design complies with the rules and regulations defined in the 14 CFR's and CAR's. Since not all specific rules and/or regulations will apply to a modification and/or installation, a decision should be made as to which are applicable, with an issue paper possibly used to document and justify a given position. 3-2. CERTIFICATION BASIS. Each TC product is associated with a list of the regulations, (either 14 CFR's or CAR's), with which compliance must be shown. a. The TC certification basis is specified by the applicable regulations located in the respective aircraft, engine, or propeller specifications, or TC data sheets. Copies of these data sheets may be viewed at the local FAA ACO, FSDO, and MIDO. See the latest version of AC 20-126, Aircraft Certification Service Field Office Listing, for locations. b. The certification basis for the STC (modification) includes certification basis of the model being changed plus those requirements effective on the date of the application and are generally related to the components or areas affected by the change. NOTE: A "top-down" approach may be needed to determine the certification basis for all changes to the TC for a significant STC project. See Order 8110.4, paragraph 14. 3-3. AVAILABILITY OF REGULATIONS. Current regulations are available from the Superintendent of Documents; U.S. Government Printing Office; Washington, DC 20402. They may also be located on FedWorld (http://www.fedworld.gov/). Earlier regulations may be available in libraries or in the Federal Register. NOTE: AC-43 series contain guidance and general information for maintenance, repair, and alteration requirements. 3-4. REGULATIONS MOST COMMONLY USED FOR STC APPLICATIONS Regulation Subject 14 CFR part 21 Certification 14 CFR part 23 or CAR 3 Airworthiness Standards: Small Airplanes CAR 4a Airworthiness Standards: Older Model Airplanes (See S.R. 407 for DC-3 and Lockheed 18) 14 CFR part 25 or CAR 4b or CAR 4a-T Airworthiness Standards: Transport Category Airplanes (See S.R. 422 for turbine aircraft certificated under CAR 4b) 14 CFR part 27 or CAR 6 Airworthiness Standards: Normal Category Rotorcraft 14 CFR part 29 or CAR 7 or CAR 7a Airworthiness Standards: Transport Category Rotorcraft CAR 8 Restricted Category 14 CFR part 31 Airworthiness Standards: Manned Free Balloons 14 CFR part 33 or CAR 13 Airworthiness Standards: Aircraft Engines 14 CFR part 34 Fuel Venting and Exhaust Emission Requirements for Turbine Engine Powered Airplanes 14 CFR part 35 or CAR 14 Airworthiness Standards: Propellers 14 CFR part 36 Noise Standard: Aircraft Type and Airworthiness Certification 14 CFR part 39 Airworthiness Directives 14 CFR part 43 Maintenance, Preventive Maintenance, Rebuilding, and Alteration 14 CFR part 45 Identification and Registration Marking 14 CFR part 47 Aircraft Registration 14 CFR part 91 General Operating And Flight Rules (partial responsibility) 14 CFR part 121 Operating Requirements: Domestic, Flag, and Supplemental Operations (partial responsibility) 14 CFR part 135 Operating Requirements: Commuter and On-Demand Operations (partial Responsibility)
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