AC 23.1309-1D

Historical

Advisory circular · System Safety Analysis and Assessment for Part 23 Airplanes

A newer version is currentThis is a historical version. AC 23.1309-1E is the version in force, approved November 17, 2011.
Approved
January 16, 2009
Last reviewed
January 28, 2009
Cancelled by
AC23.1309-1E
Family
AC 23.1309-1 · 7 versions
Revision
D
14 CFR parts
23
Cited by
1 AD
14 CFR sections
§ 23.1309

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 25–36

ensures that the hardware or software design, in which the functions are implemented, is different. As previously stated, these documents are in preliminary draft stages; therefore, these concepts are not considered in this AC. When these documents are approved, we will consider them in the next revision of this AC.