[Federal Register Volume 59, Number 54 (Monday, March 21, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-6529]


[[Page Unknown]]

[Federal Register: March 21, 1994]


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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

 

Proposed Advisory Circular; Weld Repair of Aluminum Crankcases 
and Cylinders of Piston Engines

agency: Federal Aviation Administration, DOT.

action: Notice of availability of proposed advisory circular and 
request for comments.

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summary: This notice announces the availability of, and requests 
comments on, a proposed Advisory Circular (AC), No. 33-6, Weld Repair 
of Aluminum Crankcases and Cylinders of Piston Engines. The AC provides 
information and guidance concerning an acceptable method, but not the 
only method, for the development of process specifications for weld 
repairs on crankcases and cylinders of piston engines, as required by 
Federal Aviation Regulations (FAR) Part 33.
    It addresses development of weld repairs; provides guidance to 
clarify the areas which should be addressed by an applicant's repair 
procedure, and/or substantiating data when seeking an approval for weld 
repair; and includes information on critical areas of welding, 
qualifications of welders, inspection techniques, the thermal 
processes, and technical data required.

dates: Comments must be received on or before June 6, 1994.

addresses: Send all comments on the proposed AC to the Federal Aviation 
Administration, Attn: Engine and Propeller Standards Staff, ANE-110, 
Engine and Propeller Directorate, Aircraft Certification Service, 12 
New England Executive Park, Burlington, Massachusetts 01803-5299.

for further information contact: Locke Easton, Engine and Propeller 
Standards Staff, ANE-110, at the above address, telephone (617) 238-
7113, fax (617) 238-7199.

SUPPLEMENTARY INFORMATION:

Comments Invited

    A copy of the subject AC may be obtained by contacting the person 
named above under FOR FURTHER INFORMATION CONTACT. Interested persons 
are invited to comment on the proposed AC, and to submit such written 
data, views, or arguments as they desire. Commenters must identify the 
subject of the AC, and submit comments in duplicate to the address 
specified above. All communications received on or before the closing 
date for comments will be considered by the Engine and Propeller 
Directorate, Aircraft Certification Service, before issuance of the 
final AC.

Background

    This AC was formulated to provide guidelines for applicant in the 
development of repair procedures for weld repairs on crankcases and 
cylinders of piston engines.
    It addresses development of weld repairs which are not contained in 
the engine manufacturer's ``Instructions for Continued Airworthiness'' 
(Maintenance Manual). It provides guidance to clarify the areas which 
should be addressed by an applicant's repair procedure, and/or 
substantiating data when seeking an approval for weld repair on 
crankcases or cylinders.
    This AC also includes information on critical areas of welding, 
qualifications of welders, inspection techniques, the thermal 
processes, and technical data required; and references industry and 
military specifications which are acceptable for use by repair stations 
as approved data.
    This advisory circular, published under the authority granted to 
the Administrator by 49 U.S.C. 106(g), 49 U.S.C. App. 1354(a), 1421 and 
1423, provides guidance for the development of process specifications 
for weld repairs on crankcases and cylinders of piston engines.

    Issued in Burlington, Massachusetts, on March 9, 1994.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 94-6529 Filed 3-18-94; 8:45 am]
BILLING CODE 4910-13-M