Vol. 79 Tuesday, No. 213 November 4, 2014 Part III Department of Transportation Federal Aviation Administration 14 CFR Parts 25 and 33 Airplane and Engine Certification Requirements in Supercooled Large Drop, Mixed Phase, and Ice Crystal Icing Conditions; Final Rule VerDate Sep<11>2014 18:18 Nov 03, 2014 Jkt 235001 PO 00000 Frm 00001 Fmt 4717 Sfmt 4717 E:\FR\FM\04NOR2.SGM 04NOR2 tkelley on DSK3SPTVN1PROD with RULES2 65508 Federal Register / Vol. 79, No. 213 / Tuesday, November 4, 2014 / Rules and Regulations DEPARTMENT OF TRANSPORTATION and Policy Branch, ANE–111, Engine operation of those airplanes, and for and Propeller Directorate Standards other practices, methods, and Federal Aviation Administration Staff, Aircraft Certification Service, 12 procedures relating to those airplanes New England Executive Park, and engines. 14 CFR Parts 25 and 33 Burlington, MA 01803; telephone (781) Overview of Final Rule [Docket No. FAA–2010–0636; Amendment 238–7149; facsimile (781) 238–7199; Nos. 25–140 and 33–34] email [email protected]. The FAA is adopting this final rule to For part 25 legal questions contact revise certain regulations in Title 14, RIN 2120–AJ34 Douglas Anderson, FAA, Office of the Code of Federal Regulations (14 CFR) Regional Counsel, ANM–7, Northwest Airplane and Engine Certification part 25 (Airworthiness Standards: Mountain Region, 1601 Lind Avenue Requirements in Supercooled Large Transport Category Airplanes) and part SW., Renton, WA 98057–3356; Drop, Mixed Phase, and Ice Crystal 33 (Airworthiness Standards: Aircraft telephone (425) 227–2166; facsimile Icing Conditions Engines) related to the certification of (425) 227–1007; email transport category airplanes and turbine AGENCY: Federal Aviation [email protected]. airplane engines in icing conditions. We Administration (FAA), DOT. For part 33 legal questions contact are also creating the following new Vince Bennett, FAA, Office of the ACTION: Final rule. regulations: § 25.1324—Angle of attack Regional Counsel, ANE–007, New systems; § 25.1420—Supercooled Large SUMMARY: The Federal Aviation England Region, 12 New England Drop Icing Conditions; Appendix O to Administration is amending the Executive Park, Burlington, MA 01803; Part 25—Supercooled Large Drop Icing airworthiness standards applicable to telephone (781) 238–7044; facsimile Conditions; Appendix C to Part 33 (this certain transport category airplanes (781) 238–7055; email vincent.bennett@ is intentionally left blank as a certified for flight in icing conditions faa.gov. placeholder for potential future and the icing airworthiness standards SUPPLEMENTARY INFORMATION: rulemaking unrelated to icing); and applicable to certain aircraft engines. Authority for This Rulemaking Appendix D to Part 33 Mixed Phase and The regulations will improve safety by Ice Crystal Icing Envelope (Deep addressing supercooled large drop icing The FAA’s authority to issue rules on Convective Clouds). To improve the conditions for transport category aviation safety is found in Title 49 of the safety of transport category airplanes airplanes most affected by these icing United States Code. Subtitle I, Section operating in supercooled large drop conditions; mixed phase and ice crystal 106 describes the authority of the FAA (SLD), mixed phase, and ice crystal conditions for all transport category Administrator. Subtitle VII, Aviation icing conditions, these regulations will: Programs, describes in more detail the airplanes; and supercooled large drop, • Require airplanes most affected by mixed phase, and ice crystal icing scope of the agency’s authority. This rulemaking is under the SLD icing conditions to meet certain conditions for all turbojet, turbofan, and safety standards in an expanded turboprop engines. authority described in Subtitle VII, Part A, Subpart III, Section 44701, ‘‘General certification icing environment that DATES: Effective January 5, 2015. requirements.’’ Under that section, the includes freezing drizzle and freezing ADDRESSES: For information on where to FAA is charged with promoting safe rain. These safety standards include obtain copies of rulemaking documents flight of civil aircraft in air commerce by airplane performance and handling and other information related to this prescribing minimum standards qualities requirements. • final rule, see ‘‘How To Obtain required in the interest of safety for the Expand the engine and engine Additional Information’’ in the design and performance of aircraft; installation certification, and some SUPPLEMENTARY INFORMATION section of regulations and minimum standards in airplane component certification this document. the interest of safety for inspecting, regulations (for example, angle of attack FOR FURTHER INFORMATION CONTACT: For servicing, and overhauling aircraft; and and airspeed indicating systems) to part 25 technical questions contact regulations for other practices, methods, include freezing drizzle, freezing rain, Robert Hettman, FAA, Propulsion/ and procedures the Administrator finds mixed phase, and ice crystal icing Mechanical Systems Branch, ANM–112, necessary for safety in air commerce. conditions. Transport Airplane Directorate, Aircraft This regulation is within the scope of Summary of the Costs and Benefits of Certification Service, 1601 Lind Avenue that authority because it prescribes— the Final Rule SW., Renton, WA 98057–3356; • New safety standards for the design telephone (425) 227–2683; facsimile and performance of certain transport The benefits and costs are (425) 227–1320; email robert.hettman@ category airplanes and aircraft engines; summarized in the table below. As faa.gov. and shown in the table, the total estimated For part 33 technical questions • New safety requirements necessary benefits exceed the total estimated costs contact John Fisher, FAA, Rulemaking for the design, production, and for this final rule. 2012$ 7% Present value Benefit Cost Benefit Cost Part 33 Engines ............................................................................. Qualitative ......... $13,936,000 Qualitative ........ $11,375,927 Large Part 25 Airplanes ................................................................. $362,319,857 ... 14,126,333 $76,861,295 ..... $11,531,295 Other Part 25 Airplanes ................................................................. $220,570,582 ... 33,198,788 $50,028,690 ..... $19,385,401 Total ........................................................................................ $582,890,439 ... 61,261,121 $126,889,985 ... $42,292,624 VerDate Sep<11>2014 18:18 Nov 03, 2014 Jkt 235001 PO 00000 Frm 00002 Fmt 4701 Sfmt 4700 E:\FR\FM\04NOR2.SGM 04NOR2 tkelley on DSK3SPTVN1PROD with RULES2 Federal Register / Vol. 79, No. 213 / Tuesday, November 4, 2014 / Rules and Regulations 65509 Background • Devise requirements to assess the and use of aircraft. Also, expand the Safety concerns about the adequacy of ability of an airplane to either safely appendix C icing certification envelope the icing certification standards were operate without restrictions in SLD and to include freezing drizzle/freezing rain brought to the forefront of public and mixed phase conditions or safely and mixed water/ice crystal conditions, governmental attention by a 1994 operate until it can exit these as necessary (A–96–54 supersedes A– accident in Roselawn, Indiana, conditions. 81–116 and –118). • Study the effects icing requirement involving an Avions de Transport 2. A–96–56 Re´gional (ATR) ATR 72 series airplane. changes could have on §§ 25.773, Pilot The National Transportation Safety compartment view; 25.1323, Airspeed Revise the icing certification testing Board (NTSB), with assistance from indicating system; and 25.1325, Static regulation to ensure that airplanes are pressure systems. properly tested for all conditions in ATR, the FAA, the French Direction • Ge´ne´ral de l’Aviation Civile, Bureau Consider the need for a regulation which they are authorized to operate, or D’Enquetes et D’Analyses, the National on ice protection for angle of attack are otherwise shown to be capable of Aeronautics and Space Administration probes. safe flight into such conditions. If safe (NASA), and others, conducted an The FAA ultimately determined that operations cannot be demonstrated by extensive investigation of this accident. the revised icing certification standards the manufacturer, operational This investigation determined that should include SLD, mixed phase, and limitations should be imposed to freezing drizzle-sized drops created a ice crystal icing conditions. This rule is prohibit flight in such conditions, and ridge of ice on the wing’s upper surface based on ARAC’s recommendations to flightcrews should be provided with the aft of the deicing boots and forward of the FAA. means to positively determine when the ailerons. The investigation further A. Related Actions they are in icing conditions that exceed concluded that this ridge of ice the limits for aircraft certification. ARAC’s IPHWG submitted additional contributed to an uncommanded roll of icing rulemaking recommendations to C. Summary of the Notice of Proposed the airplane. Based on these findings, the FAA that led to the Part 25 and Part Rulemaking the NTSB recommended changes to the 121 Activation of Ice Protection final The notice of proposed rulemaking icing certification requirements. 3 The atmospheric icing conditions for rules. For certain airplanes certificated (NPRM), Notice No. 10–10, published in certification are specified in part 25, for flight in icing, those rulemaking