Approval of Flight Guidance Systems

Source details

Change description

Change 2 provides clarification on the autopilot disengagement aural alert. Change 2 also provides clarification about potential hazards for systems without automatic disengagement to address the automatic trim response to an override of the autopilot. Change 2 also provides clarification about potential hazards caused by incompatible mode engagement. Change 2 updates references to related ACs and industry documents.

Cancels

AC 25.1329-1B; AC 25.1329-1C Change 1

Referenced documents

PS-ANM-25-16

CFR parts

Part 25

CFR sections

Sec. 25.1301; Sec. 25.1309; Sec. 25.1322; Sec. 25.1329; Sec. 25.1420; Sec. 25.143; Sec. 25.1581; Sec. 25.1583; Sec. 25.1585; Sec. 25.301; Sec. 25.671; Sec. 25.672; Sec. 25.677; Sec. 25.777; Sec. 25.779; Sec. 25.781; Sec. 25.901; Sec. 25.903

Issue date

2014-10-27

Revision date

2026-02-18T14:39:19.972Z

Advisory circular research

Find FAA guidance by document number, subject and referenced regulations. Advisory circulars describe guidance and acceptable approaches; the applicable regulation and project approval basis determine what your team must demonstrate.

1. Match the circular and change number to your certification or operating question.
2. Review the source's cancellation and replacement references before relying on an earlier edition.
3. Map the cited CFR sections to the actual aircraft, modification and compliance evidence for your project.