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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that is no longer in effect. There are no compliance requirements for a superseded AD.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.
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