GM1 21.A.165(c)(3)(i) Obligations of the holder

• ED Decision 2021/011/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)
• ED Decision 2025/016/R found in: Initial Airworthiness and Environmental Protection (748/2012) (Nov 2025)

GM1 21.A.165(c)(3) Definitions of engine type certification date and production date ED Decision 2021/011/R Volume II of Annex 16 to the Chicago Convention contains three different references to applicability dates: 1.       the ‘date of manufacture for the first individual production model’, which refers to the date when the type certificate is issued for the engine type or model; 2.       the ‘date of application for a type certificate’, which refers to the application date to the certificating authority of the State of Design of the engine type certification; and 3.       the ‘date of manufacture for the individual engine’, which refers to the production date of a specific engine serial number (date of EASA Form 1). The third reference refers to the date of the first engine EASA Form 1 issued after the completion of the engine production pass-off test. The third reference is used in the application of engine emissions production cut-off requirement which specifies a date after which all in-production engine models must meet a certain emissions standard. [21.A.165](#_DxCrossRefBm1649096910)(c)(3) includes the production requirements for engine exhaust emissions. ICAO Doc 9501 ‘Environmental Technical Manual’ Volume II provides guidance on these applicability dates. ##### GM1 21.A.165(c)(3)(i) Obligations of the holder *ED Decision 2025/016/R* **DEFINITIONS OF ENGINE TYPE CERTIFICATION DATE AND PRODUCTION DATE** Volume II of Annex 16 to the Chicago Convention contains three different references to applicability dates: 1. the ‘date of manufacture for the first individual production model’, which refers to the date when the type certificate is issued for the engine type or model; 2. the ‘date of application for a type certificate’, which refers to the application date to the certificating authority of the State of Design of the engine type certification; and 3. the ‘date of manufacture for the individual engine’, which refers to the production date of a specific engine serial number (date of EASA Form 1). Point 1 refers to the date of the first engine EASA Form 1 issued after the completion of the engine production pass-off test. Point 3 refers to the date used in the application of engine emissions production cut-off requirement, on or after which all in-production engine models must meet a certain emissions standard. [21.A.165](#_DxCrossRefBm485230401)(c)(3) includes the applicable production requirements for aircraft engine emissions. ICAO Doc 9501 ‘Environmental Technical Manual’ Volume II provides guidance on these applicability dates.