Advisory
Circular
Subject:
PrnvE MAIWCE
Date:
10/28/83
ACNo. 43012A
Initiated by:
AWS-340 -;
1 0 PURFOSE.
This advisory cikular (AC) provides infomtion oonceming
preventive maintenance, tie ruay perform it, the standards of performance
applicable to it, authority for approving aircraft for return to service, and
the applicable recording requirements.
This AC also clarifies those areas mst
frequently misunderstood in the past, and explains the recent changes in the
rules oonceming preventive maintenance.
2 CANCELLATION.
canceled.
AC 43-12, Preventive Maintenance, dated July 16, 1976, is
3
RELATED FEDERAL AVIATION REGULATIONS (FAR). Part 1, Definitions and
Abbreviations I Section 1.1; Part 43, Maintenance, Preventive Maintenance,
Rebuilding, and Alteration; Part 61, Certification: Pilots and Flight
Instructors: and Part 145, Repair Stations.
4
l
PREVENTIVEMAIWI'ENANCE,
a.
The holders of mcharhc and repairman certificates, persons working
under the supervision of these rrrechanics and repa'imn, repair stations
certificated under Part 145, and air carriers certificated under Par& 121, 127,
and 135, are authorized to perform preventive maintenance.
These persons are
also authorized to perform other maintenance. Therefore, it is of little
consequence to
them
hm a particular function is classified, since they are
authorized to perform the function as either preventive mintenance or as other
maintenance. Further, the procedures used in approving for return to service
and recording are identical. This AC will, therefore, consider preventive
maintenance from the -&operators point of view.
b FAR Part 1, Section 1.1, defines preventive rrraintenance as ". . .
si& or minor preservation operations and the replacetint of mall standard
parts not involving c&lex asse&ly operations."
.
(1)
FAR
Part 43, Appendix
A,
paragraph (c) contains the list of those
functions determined by the FAA to met this definition. If a function does not
appear in this list, it is not preventive maintenance.
Further, because of
differences in aircraft, a function TMY be preventive mintenance on me
aircraft and not on another. To provide for this, paragraph (c) contains the
limitation, "provided it does not involve complex assembly operations" on the
-
aircraft involved. Owners and pilots rmst use good judgment in determining that
a specific function TMY appropriately be classified as preventive maintenance.
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