[Federal Register Volume 60, Number 33 (Friday, February 17, 1995)]
[Notices]
[Page 9422]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-4075]



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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 issuance of advisory circular.

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SUMMARY: This notice announces the reissuance of 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.

FOR FURTHER INFORMATION CONTACT:
Locke Easton, Engine and Propeller Standards Staff, ANE-110, at the 
above address, telephone (617) 238-7113, fax (617) 238-7113.

SUPPLEMENTARY INFORMATION:

Background

    This AC was formulated to provide guidelines for applicants 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 February 2, 1995.
James C. Jones,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 95-4075 Filed 2-16-95; 8:45 am]
BILLING CODE 4910-13-M