List of Significant and Non-Significant Standards Differences (SSD and non-SSD)
The table below is a list of Significant Standards Differences (SSD) and Non-Significant Standards Differences (non-SSD) between title 14, U.S. Code of Federal Regulations (14 CFR) part 25 and Joint Aviation Regulation (JAR) part 25, or European Aviation Safety Agency (EASA) Certification Specifications (CS) 25, as noted.
Prior to the issuance of FAA Order 8110.52 on April 29, 2005, the terms Significant Regulatory Differences (SRD) and Non-Significant Regulatory Differences (non-SRD) were used. These terms are equivalent to SSD and non-SSD, respectively.
With the introduction of FAA/EASA Technical Implementation Procedures (TIP) Rev. 3, the non-SSD term was eliminated.
| Effective Date | 14 CFR | JAR/CS | SSD | Non-SSD |
|---|---|---|---|---|
| 11/24/2021 | Amend. 25-146 | CS 25 Amend. 27 | SSD | N/A |
| 12/15/2020 | Amend. 25-146 | CS 25 Amend. 26 | SSD* | N/A |
| 6/24/2020 | Amend. 25-146 | CS 25 Amend. 25 | SSD* | N/A |
| 1/10/2020 | Amend. 25-146 | CS 25 Amend. 24 | SSD* | N/A |
| 7/15/2019 | Amend. 25-146 | CS 25 Amend. 23 | SSD* | N/A |
| 11/19/2018 | Amend. 25-146 | CS 25 Amend. 22 | SSD* | N/A |
| 11/5/2018 | Amend. 25-145 | CS 25 Amend. 22 | SSD* | N/A |
| 3/27/2018 | Amend. 25-145 | CS 25 Amend. 21 | SSD* | N/A |
| 3/5/2018 | Amend. 25-145 | CS 25 Amend. 20 | SSD* | N/A |
| 8/30/2017 | Amend. 25-144 | CS 25 Amend. 20 | SSD* | N/A |
| 6/23/2016 | Amend. 25-142 | CS 25 Amend. 18 | SSD* | N/A |
| 3/13/2015 | Amend. 25-141 | CS 25 Amend. 16 | SSD* | N/A |
| 2/9/2015 | Amend. 25-141 | CS 25 Amend. 15 | SSD* | N/A |
| 7/22/2014 | Amend. 25-138 | CS 25 Amend. 15 | SSD* | N/A |
| 7/2/2013 | Amend. 25-137 | CS 25 Amend. 13 | SSD* | N/A |
| 7/13/2012 | Amend. 25-136 | CS 25 Amend. 12 | SSD* | N/A |
| 3/12/2012 | Amend. 25-136 | CS 25 Amend. 11 | SSD* | N/A |
| 3/12/2012 | Amend. 25-136 | CS 25 Amend. 11 | SSD | Non-SSD |
| 12/23/2010 | Amend. 25-130 | CS 25 Amend. 10 | SSD* | Non-SSD |
| 12/18/2009 | Amend. 25-129 | CS-25 Amend. 8 | SSD* | Non-SSD |
| 5/29/2009 | Amend. 25-128 | CS-25 Amend. 5 | SSD | Non-SSD |
| 9/19/2008 | Amend. 25-125 | CS-25 Amend. 5 | SSD | Non-SSD |
| 6/6/2008 | Amend. 25-122 | CS-25 Amend. 3 | SSD | Non-SSD |
| 2/15/2007 | Amend. 25-120 | CS-25 Amend. 2 | SSD | Non-SSD |
| 10/2/2006 | Amend. 25-119 | CS-25 Amend. 2 | SSD | Non-SSD |
| 5/11/2006 | Amend. 25-119 | CS-25 Amend. 1 | SSD | Non-SSD |
| 12/12/2005 | Amend. 25-117 | CS-25 Amend. 1 | SSD | Non-SSD |
| 12/17/2004 | Amend. 25-117 | CS-25 Amend. 0 | SSD | Non-SSD |
| 11/26/2004 | Amend. 25-116 | CS-25 Amend. 0 | SSD | Non-SSD |
| 8/2/2004 | Amend. 25-115 | CS-25 Amend. 0 | SSD | Non-SSD |
| 6/2/2004 | Amend. 25-114 | CS-25 Amend. 0 | SSD | Non-SSD |
| 4/15/2004 | Amend. 25-113 | Change 16/CS-25 | SRD | Non-SRD** |
| 5/1/2003 | Amend. 25-108 | Change 16/CS-25 | SRD | Non-SRD** |
| 12/26/2002 | Amend. 25-108 | Change 15 | SRD | Non-SRD |
| 5/24/2002 | Amend. 25-107 | Change 15 | SRD | Non-SRD |
| 7/26/2001 | Amend. 25-105 | Change 15 | SRD | Non-SRD |
| 10/1/2000 | Amend. 25-98 | Change 15 | SRD | Non-SRD |
| 3/10/1999 | Amend. 25-98 | Change 14 OP 25/96/1 | SRD | Non-SRD |
| 3/31/1998 | Amend. 25-96 | Change 14 OP 25/96/1 | SRD | Non-SRD |
| 7/29/1997 | Amend. 25-91 | Change 14 OP 25/96/1 | SRD | Non-SRD |
| 7/5/1996 | Amend. 25-87 | Change 14 OP 25/96/1 | SRD | Non-SRD |
NOTES:
* These SSD lists were updated on November 27, 2023; updated references are noted within the documents.
** Section 25.1415(c) was inadvertently removed from these non-SRD lists at the time they were first posted. As of Dec. 29, 2006, this standards difference has been restored to the affected lists.