## superseded Ad 

An AD is no longer in effect when it is superseded by a new AD. The superseding AD identifies the AD that is no longer in effect. There are no compliance requirements for a superseded AD. 

## Compliance with Ads 

For purposes of compliance, ADs may be divided into two categories: 

• Those of an emergency nature requiring immediate compliance before further flight, or 

• Those of a less urgent nature requiring compliance within a relatively longer period of time. 

ADs are the “final rule” and compliance is required unless specific exemption is granted. Aircraft owners are responsible for ensuring compliance with all pertinent ADs. This includes those ADs that require recurrent or continuing action. For example, an AD may require a repetitive inspection each 50 hours of operation, meaning the particular inspection must be accomplished and recorded every 50 hours of time in service. 

m CAUTION: Aircraft owners are reminded that there is no provision to overfly the maximum hour requirement of an AD unless it is specifically written into the AD. 

## Amateur-Built Aircraft 

For help in determining if an AD applies to your amateur-built aircraft, contact your local Flight Standards District Office (FSDO). 

## summary of Ads 

14 CFR part 91, section 91.417, requires a record to be maintained that shows the current status of applicable ADs, including: 

• Method of compliance; 

• AD number and revision date; 

• Date and time when due again, if recurring; 

• Certified mechanic’s signature; 

• Type of certificate; and 

• Certificate number of the repair station or mechanical performing the work. 

For ready reference, many aircraft owners keep a chronological listing of the pertinent ADs in the back of their aircraft and engine records. Generally, a summary of ADs contains all the valid ADs previously published. Figure 9-1  is a sample form of summary of ADs. 

## obtaining Ads 

Both AD categories (small and large aircraft) are published in biweekly supplements. All ADs are available on the FAA website at www.faa.gov. Advisory Circular (AC) 39-7 (as revised), Airworthi- ness Directives, provides additional guidance and information for aircraft owners and operators about their responsibilities for complying and recording ADs. For more information, contact the FAA Regulatory Support Division, Delegation and Airworthiness Programs Branch (AIR-140). AIR-140 contact information is available in the FAA Contact Information appendix on pages A1–A2 of this handbook. 

