文档介绍：Advisory
. Department
of Transportation
Federal Aviation
Administration Circular
AC 121-1A
DATE: 7/7/1978
AC No: 121-1A
Change: 4
Date: 7/7/78
Initiated
by: AFS-320
Subject: STANDARD OPERATIONS SPECIFICATIONS - AIRCRAFT
MAINTENANCE HANDBOOK
1. PURPOSE. This handbook provides procedures acceptable to
the Federal Aviation Administration which may be used by
operators when establishing inspection intervals and
overhaul times. A list of sample Operations Specifications
- Aircraft Maintenance, General, for aircraft currently
being used in air transportation, is incorporated in this
document to further aid the operator in preparing his
program.
2. CANCELLATION. This advisory circular cancels:
a. Advisory Circular 120-21, Aircraft Maintenance Time
Limitations, dated 6/24/66.
b. Advisory Circular 120-24A, Establishment and Revision
of Aircraft Engine Overhaul and Inspection Periods,
dated 2/25/69.
c. Advisory Circular 121-1, Standard Maintenance
Specifications, dated 12/15/62.
3. HOW TO ORDER THIS HANDBOOK. This publication is furnished
free of charge. Additional copies may be ordered from:
Department of Transportation
Distribution Operations Unit, TAD
Washington, . 20591
Identify the publication in your order as:
FAA AC No. 121-1A,
Standard Operations Specifications - Aircraft
Maintenance Handbook
Dated: June 26, 1973
4. CHANGES TO THIS HANDBOOK. Revised pages to this Advisory
Circular will be transmitted by Advisory Circular Changes.
If you order the basic handbook, we will put your name on
the mailing list to receive changes.
/s/ C. R. Melugin, Jr.
Acting Director, Flight Standards Service
TABLE OF CONTENTS
Page No.
CHAPTER 1. INTRODUCTION. 1
1. Purpose. 1
2. Eligibility. 1
3. Cancellation. 1
4. Definitions. 1
5. General. 2
6. Revision of Time Limitations - General. 5
7. Airframe - Revision of Time Limitations. 6
8. Powerplant and Associated Appliances - Re