Bailey Moyes 912 Dragonfly, Руководство по обслуживанию

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Advisory Circular 43-12a
Preventive Maintenance
Subject: Preventive Maintenance
Date: 10/28/83
AC No: 43-12A
Initiated by: AWS-340
1. PURPOSE. This advisory circular (AC) provides information concerning preventive maintenance, who may 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 most frequently misunderstood in the past, and explains the
recent changes in the rules concerning preventive maintenance.
2. CANCELLATION. AC 43-12, Preventive Maintenance, dated July 16, 1976, is canceled.
3. RELATED FEDERAL AVIATION REGULATIONS (FAR). Part 1, Definitions and Abbreviations, Section 1.1; Part 43,
Maintenance, Preventive Maintenance, Rebuilding, and Alteration; Part 61, Certification: Pilots and Flight Instructors; and
Part 145, Repair Stations.
4. PREVENTIVE MAINTENANCE.
a. The holders of mechanic and repairman certificates, persons working under the supervision of these mechanics and
repairmen, repair stations certificated under Part 145, and air carriers certificated under Parts 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 how a particular function is classified, since they are authorized to perform the function as
either preventive maintenance 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 owners/operators point of view.
b. FAR Part 1, Section 1.1, defines preventive maintenance as ".... simple or minor preservation operations and the
replacement of small standard parts not involving complex assembly operations."
1. FAR Part 43, Appendix A, paragraph (c) contains the list of those functions determined by the FAA to meet this
definition. If a function does not appear in this list, it is not preventive maintenance. Further, because of
differences in aircraft, a function may be preventive maintenance on one 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 must use good judgment in determining that a specific function may
appropriately be classified as preventive maintenance.
2. A pilot may not perform preventive maintenance on aircraft used under Parts 121, 127, or 135, even when the
pilot owns the aircraft.
c. Persons authorized to perform preventive maintenance. In addition to those persons listed in paragraph 4a of this AC,
Section 43.3(g) authorizes the holder of a pilot certificate issued under Part 61 to perform preventive maintenance. Section
43.7 limits the privileges to persons holding at least a private pilot certificate and Section 43.5 prohibits operation of the
aircraft unless approved for return to service. Further, pilots may only approve for return to service preventive maintenance
which they themselves have accomplished.
1. A pilot is defined as a person holding at least a private pilot certificate or above.
2. A pilot may not perform preventive maintenance on aircraft used under FAR Parts 121, 127, or 135, even when
the pilot owns the aircraft.
3. A pilot who owns an aircraft may not work on his/her aircraft unless they hold at least a Private pilot certificate.
d. Applicable performance standards.
1. FAR 43.13 requires preventive maintenance to be done using methods, techniques, and practices acceptable to
the Administrator. These are normally set forth in the manufacturer’s maintenance manuals; however, some may
be found in ACs published by the FAA.
[NOTE: It is absolutely essential to have the appropriate manuals and data when performing preventive
maintenance.]
Appendix D Page 5