Annex 5 to Appendix 3 to AMC 20-20B List of major changes and STCs that may adversely affect fatigue-critical structure

• ED Decision 2020/023/R found in: AMC-20 Amdt 21 - Airworthiness of Products, Parts and Appliances (Apr 2021)
• ED Decision 2021/007/R found in: AMC-20 Amdt 22 - Airworthiness of Products, Parts and Appliances (May 2021)

Annex 5 to Appendix 3 to AMC 20-20A List of major changes and STCs that may adversely affect fatigue-critical structure ED Decision 2020/023/R (1)       Passenger-to-freighter conversions (including addition of main deck cargo doors). (2)       Gross weight increases (increased operating weights, increased zero fuel weights, increased landing weights, and increased maximum take-off weights). (3)       Installation of fuselage cut-outs (passenger entry doors, emergency exit doors or crew escape hatches, fuselage access doors, and cabin window relocations). (4)       Complete re-engine or pylon modifications. (5)       Engine hushkits. (6)       Wing modifications such as installing winglets or changes in flight control settings (flap droop), and modification of wing trailing edge structure. (7)       Modified skin splices. (8)       Antenna installations. (9)       Any modification that affects several stringer or frame bays. (10)     Any modification that covers structure requiring periodic inspection by the operator’s maintenance programme. (11)     Any modification that results in operational mission change that significantly changes the manufacturer’s load or stress spectrum (e.g. passenger-to-freighter conversion). (12)     Any modification that changes areas of the fuselage that prevents external visual inspection (e.g. installation of a large external fuselage doubler that results in hiding details beneath it). (13)     In general, attachment of interior monuments to FCS. Interior monuments include large items of mass such as galleys, closets, and lavatories. [Amdt 20/2] [Amdt 20/20] Annex 5 to Appendix 3 to AMC 20-20B List of major changes and STCs that may adversely affect fatigue-critical structure ED Decision 2021/007/R (1) Passenger-to-freighter conversions (including addition of main deck cargo doors). (2) Gross weight increases (increased operating weights, increased zero fuel weights, increased landing weights, and increased maximum take-off weights). (3) Installation of fuselage cut-outs (passenger entry doors, emergency exit doors or crew escape hatches, fuselage access doors, and cabin window relocations). (4) Complete re-engine or pylon modifications. (5) Engine hushkits. (6) Wing modifications such as installing winglets or changes in flight control settings (flap droop), and modification of wing trailing edge structure. (7) Modified skin splices. (8) Antenna installations. (9) Any modification that affects several stringer or frame bays. (10) Any modification that covers structure requiring periodic inspection by the operator’s maintenance programme. (11) Any modification that results in operational mission change that significantly changes the manufacturer’s load or stress spectrum (e.g. passenger-to-freighter conversion). (12) Any modification that changes areas of the fuselage that prevents external visual inspection (e.g. installation of a large external fuselage doubler that results in hiding details beneath it). (13) In general, attachment of interior monuments to FCS. Interior monuments include large items of mass such as galleys, closets, and lavatories. [Amdt 20/2] [Amdt 20/20] [Amdt 20/22] Annex 5 to Appendix 3 to AMC 20-20B List of major changes and STCs that may adversely affect fatigue-critical structure ED Decision 2021/007/R (1)       Passenger-to-freighter conversions (including addition of main deck cargo doors). (2)       Gross weight increases (increased operating weights, increased zero fuel weights, increased landing weights, and increased maximum take-off weights). (3)       Installation of fuselage cut-outs (passenger entry doors, emergency exit doors or crew escape hatches, fuselage access doors, and cabin window relocations). (4)       Complete re-engine or pylon modifications. (5)       Engine hushkits. (6)       Wing modifications such as installing winglets or changes in flight control settings (flap droop), and modification of wing trailing edge structure. (7)       Modified skin splices. (8)       Antenna installations. (9)       Any modification that affects several stringer or frame bays. (10)     Any modification that covers structure requiring periodic inspection by the operator’s maintenance programme. (11)     Any modification that results in operational mission change that significantly changes the manufacturer’s load or stress spectrum (e.g. passenger-to-freighter conversion). (12)     Any modification that changes areas of the fuselage that prevents external visual inspection (e.g. installation of a large external fuselage doubler that results in hiding details beneath it). (13)     In general, attachment of interior monuments to FCS. Interior monuments include large items of mass such as galleys, closets, and lavatories. [Amdt 20/2] [Amdt 20/20] [Amdt 20/22]