[Federal Register Volume 63, Number 215 (Friday, November 6, 1998)]
[Notices]
[Page 60038]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-29783]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Advisory Circular; Manufacturing Process of Premium Quality
Titanium Alloy Rotating Engine Components
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of issuance of Advisory Circular (AC).
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SUMMARY: This notice announces the issuance of Advisory Circular (AC),
No. 33.15-1, Manufacturing Process of Premium Quality Titanium Alloy
Rotating Engine Components. This AC provides guidance and information
for compliance pertaining to the materials suitability and durability
requirements, Sec. 33.15, as applicable to the manufacture of titanium
alloy high energy rotating parts of aircraft engines. Like all AC
material, this AC is not, in itself, mandatory and does not constitute
a regulation. It is issued to provide an acceptable means, but not the
only means, of compliance with Sec. 33.15. While these guidelines are
not mandatory, they are derived from extensive Federal Aviation
Administration (FAA) and industry experience in determining compliance
with the pertinent regulations.
DATES: Advisory Circular No. 33.15-1, was issued by the New England
Aircraft Certification Service, Engine and Propeller Directorate on
September 22, 1998.
FOR FURTHER INFORMATION CONTACT:
Tim Mouzakis, Engine and Propeller Standards Staff, ANE-110, 12 New
England Executive Park, Burlington, MA, 01803, telephone (781) 238-
7114, fax (781) 238-7199.
SUPPLEMENTARY INFORMATION:
Background
Advisory Circulars 21-1B, 21-6A, 21-9A, 21-27, and 21.303-1A,
provide a means to obtain and maintain production approvals; however,
these documents do not fully cover the manufacturing processes used in
the manufacture of premium quality titanium alloy forged rotating
components for type certificated turbine engines. This AC, therefore,
provides supplemental guidance for the establishment of manufacturing
processes, in process material and component inspections, and finished
component inspections, for manufacture of premium quality titanium
alloy forged rotating components, such as disks, spacers, hubs, shafts,
spools and impellers, but not blades.
Interested parties were given the opportunity to review and comment
on the draft AC during the proposal and development phases. Notice was
published in the Federal Register on July 17, 1997 (62 FR 38338), to
announce the availability of, and comment to the draft AC.
This advisory circular, published under the authority granted to
the Administrator by 49 U.S.C. 106(g), 4113, 44701-44702, 44704,
provides guidance for these requirements.
Issued in Burlington, Massachusetts, on September 22, 1998.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification
Service.
[FR Doc. 98-29783 Filed 11-5-98; 8:45 am]
BILLING CODE 4910-13-M
