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applicable ADs issued by the FAA for his or her
aircraft. The FAA issues ADs to notify aircraft owners
and other interested persons of unsafe conditions
and to specify the corrective action required,
including conditions under which the aircraft may
continue to be operated.
The aircraft’s maintenance records should indicate
the current status of all applicable ADs, including for
each:
• AD number,
• Method of compliance,
• Revision date, and
• Recurring action (if applicable) including the time
and date of the next action required.
safety directives
The owner or operator of an aircraft having a
special airworthiness certificate must comply with
each safety directive applicable to the aircraft that
corrects an existing unsafe condition or corrects
the condition in a manner different from safety
directive specifications if the person issuing the
directive agrees with the action. Otherwise, the
owner or operator may, in accordance with 14 CFR
part 91, section 91.327, “obtain an FAA waiver from
the provisions of the safety directive based on a
conclusion that the safety directive was
issued without adhering to the applicable consensus
standard.”
Light-sport category aircraft certificated pursuant
to 14 CFR part 21, section 21.190 have mandatory
compliance with all manufacturer safety directives.
service Bulletins
A service bulletin contains a recommendation from
the manufacturer, with which that manufacturer
believes the aircraft owner should comply, that often
reflects a safety-of-flight issue that the manufacturer
believes should be addressed within a certain timeframe. It may result from an improvement developed
by the manufacturer, or it may address a defect in
a product or published documentation.
The manufacturer responds to one of these situations by issuing a service bulletin that recommends
a certain type of inspection, replacing certain
components, performing maintenance in a specific
manner, or limiting operations under specified
conditions. Sometimes, compliance with a service
bulletin may be triggered by the occurrence of
a particular event (e.g., the lapse of time or operation
under certain types of conditions).
FAA Form 337,
major repair and Alteration
A mechanic who performs a major repair or major
alteration shall record the work on FAA Form 337
and have the work inspected and approved by a
mechanic who holds an inspection authorization (IA).
(Light-sport aircraft do not require Form 337 when
altering a non-approved product.) A signed copy
shall be given to the owner and another copy sent
to the FAA Aircraft Registration Branch (AFS-750)
in Oklahoma City, Oklahoma within 48 hours of
aircraft approval for return to service. However,
when a major repair is done by a certificated repair
station, the customer’s work order may be used
and a release given as outlined in 14 CFR Part 43,
Appendix B, Recording of Major Repairs and Major
Alterations. You can obtain additional information
and instructions for completing FAA Form 337 in
Advisory Circular (AC) 43-9 (as revised), Aircraft
Maintenance Records. Figure 8-2 at the end of this
chapter is a sample FAA Form 337.
entries into Aircraft maintenance records
Each time maintenance, including preventive main-
tenance, is performed on your aircraft, an appropriate
entry must be added to the maintenance records.
Chapter 8: Aircraft Maintenance Records Chapter 8: Aircraft Maintenance Records
8
8-3
14 CFR Part 43, Section 43.9,
Content, form, and disposition of
maintenance, preventive maintenance,
rebuilding, and alteration records (except
inspections performed in accordance
with part 91, part 125, §135.411(a)(1), and
§135.419 of this chapter
Any person who maintains, rebuilds or alters an
aircraft, airframe, aircraft engine, propeller, or
appliance shall make an entry containing:
• A description of the work or some reference
to data acceptable to the FAA,
• The date the work was completed,
• The name of the person who performed the
work, and
• If the work was approved for return to service,
the signature, certificate number, and kind of
certificate held by the person approving the
aircraft for return to service.
14 CFR Part 43, Section 43.11,
Content, form, and disposition of records for
inspections conducted under parts 91 and
125 and §§135.411(a)(1) and 135.419 of this
chapter
When a mechanic approves or disapproves an aircraft for return to service after an annual, 100-hour,
　
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