GM2 Annex I Abbreviations

GMGuidance material

For the purpose of the AMC and GM to Part 21, the following abbreviations apply:

AFM	Aircraft flight manual
AMC	Acceptable means of compliance
APU	Auxiliary power unit
CEO	Chief executive officer
CMR	Certification maintenance requirement
CofA	Certificate of airworthiness
CRI	Certification review item
CS	Certification specification
CS-CCD	Certification Specifications for Cabin Crew Data
CS-FCD	Certification Specifications for Operational Suitability Data (OSD) Flight Crew Data
CS-GEN-MMEL	Certification Specifications for Generic Master Minimum Equipment List
CS-MMEL	Certification Specifications for Master Minimum Equipment List
CS-MCSD	Certification Specifications for Maintenance Certifying Staff Data
CS-SIMD	Certification Specifications for Simulator Data
DAH	Design approval holder
DO	Design organisation
DOA	Design organisation approval
EDTO	Extended diversion time operation
ELOS	Equivalent level of safety
ESF	Equivalent safety finding
ETSO	European technical standard order
FOD	Foreign object damage
HDO	Head of the design organisation
ICAO	International Civil Aviation Organization
ICA	Instructions for continued airworthiness
OP	Other party
OSD	Operational suitability data
PAH	Production approval holder
PO	Production organisation
POA	Production organisation approval
POATL	Production organisation approval team leader
POE	Production organisation exposition
GM	Guidance material
MoC	Means of compliance
RCofA	Restricted certificate of airworthiness
RTC	Restricted type certificate
SC	Special condition
SMS	Safety management system
STC	Supplemental type certificate
TC	Type certificate
TCDS	Type certificate data sheet

GM — Regulation (EU) No 748/2012 · ED Decision 2022/021/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025