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VOLUME 23

NUMBER 196

Washington, Tuesday, October 7, 1958
TITLE 14 CIVIL AVIATION
Chapter I Civil Aeronautics Board Subchapter A Civil Air Regulations
Civil Air Regs., Arndt. 18-2
Part 18M aintenance, R epair, and A l teration of A irframes, P owerplants, P ropellers, and A ppliances REQUIRED RECORDS

Adopted by the Civil Aeronautics Board at its office in Washington, D. C., on the 1st day of October 1958.
A notice of proposed rule making was published in the F ederal R egister March 13,1958 23 F. R. 1737 and circu lated to the industry as Economic Regu lations D raft Release No. 92, dated March 7, 1958, which proposed to amend Part 18 to bring the maintenance record requirements into accord with the wide spread use of the approved system of continuous maintenance and the in creased complexity of modern aircraft and their components. In addition, it was proposed to make such changes as were necessary to achieve consistency with corresponding record retention pro visions in P art 249 of the Economic Regulations, Preservation of Air Car rier Accounts, Records and Memoranda.
Accordingly, concurrently with the amendment of P art 249, the maintenance record provisions of 18.24 of Part 18 are being amended to require retention for at least one year of records of all main tenance performed. In addition to this requirement, the records of the last com plete overhaul cycle for each aircraft and its components must also be kept avail able at all times, when an approved maintenance system is used. The latter retention requirement recognizes the widespread use by air carriers of the ap proved system of continuous mainte nance and is intended to insure that one complete set of the most recent overhaul records for each aircraft and its com ponents will be available for inspection and accident investigation purposes.
Any procedure which does not insure the availability of one complete set of rec ords covering the last complete overhaul cycle for each aircraft will not be deemed to.have met the record retention require ments which apply in the case of aircraft maintained in accordance with an ap proved continuous maintenance system.

In adopting this amendment the Board has considered and finds unacceptable the suggestion that the records of over haul be retained in accordance with a sampling inspection procedure. . Such suggestion would not insure th at com plete records, for each aircraft would be available for accident investigation pur poses.
With respect to records of major struc tural repairs and alterations, the reten tion requirements are being amended to require retention of such records until the aircraft is sold, in which case the records are to be transferred with the aircraft, or, if the aircraft is retired, for one year from the date of cancellation of the registration certificate.
A new provision is being added to pro vide for the retention of records of Xrays, and other special tests specified by the Administrator, which relate to aircraft components designated by the Administrator as critical components as, for example, the records of special tests conducted on propellers. There are propellers used on conventional air car rier aircraft which are of such a critical nature as to require, during manufacture and periodically throughout their useful life, examination by such means as Xray and sonic tests, among others. Fur thermore, it is anticipated th at m any more of the components of turbinepowered aircraft which the air carriers will be using in significant numbers in the near future will be of such a critical nature, due to high speeds and stresses, as to require special examinations and tests periodically throughout their use ful life. The Board considers it essential th at those components of conventional and turbine-powered aircraft which are of a critical nature be in a safe condition for use. This amendment will give greater assurance of the safety of com ponents designated by the Administra tor as critical by requiring the records of special tests to be retained by the air carrier until, such components are sold or, if retired, for one year from the date of retirement or the cancellation of the registration certificate, if registered.
The foregoing record requirements are considered necessary to enable the Board and the Administrator to dis charge fully their respective accident Continued on next page
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CONTENTS
Agricultural Marketing Service
Pas
Proposed rule making :
Grapes, Tokay, grown in San Joaquin a n d Sacramento Counties, Calif _________ 7729
Rules and regulations:
Pears, certain varieties, grown in Oregon, Washington, and California________________ 7729
Agriculture Department
See Agricultural Marketing Serv ice.
Civil Aeronautics Administra tion
Rules and regulations:
Designation alterations:
Civil airways_________
7724
Continental control area, con trol areas, control zones, re porting points, and positive control route segments____ 7725
Standard instrument approach procedures; alterations_____ 7726
Civil Aeronautics Board
Rules and regulations:
Required records:
Airframes, powerplants, pro pellers, a n d appliances;
maintenance, repair, and alteration_______________
Carrier accounts, records and memoranda, preservation_
Certification and operation rules of scheduled air carriers:
Interstate_______________
Outside continental limits of United States________

7721
7723

7722
7723

Commerce Department
See also Civil Aeronautics Admin istration.
Notices:
Maritime Administrator; dele gation of authority relating to investment o f contractors funds------------------------------- 7736
Federal Power Commission
Notices :
Hearings, etc. :
Atlantic Seaboard Corp_____ 7745"
California Electric Power Co_ 7736
Crescent Production Co., Inc_ 7741
Crescent Production Co., Inc., et al. 2 documents__ 7750,7751
El Paso Natural Gas Co. et al_ 7738
7721

LIBRQ
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1958