[Federal Register Volume 62, Number 63 (Wednesday, April 2, 1997)]
[Notices]
[Pages 15742-15743]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-8278]


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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration


Advisory Circular; Turbine Engine Vibration Survey

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of issuance Advisory Circular (AC) on turbine engine 
vibration survey.

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SUMMARY: This notice announces the issuance of Advisory Circular (AC), 
No. 33.83, Turbine Engine Vibration Survey. This AC is on the subject 
of vibration tests and surveys. A set of improved and harmonized 
requirements were incorporated into part 33 of the Federal Aviation 
Regulations (FAR's), and this AC is meant to provide information and 
guidance concerning an acceptable method, but not the only method, for 
complying with those new harmonized requirements.

DATES: Advisory Circular No. 33.83 was issued by the New England 
Aircraft Certification Service, Engine and the Propeller Directorate on 
February 14, 1997.

FOR FURTHER INFORMATION CONTACT:

[[Page 15743]]

Thomas Boudreau, Engine and Propeller Standards Staff, ANE-110, 12 New 
England Executive Park, Burlington, MA, 01803, telephone (617) 238-
7117, fax (617) 238-7199.

SUPPLEMENTARY INFORMATION:

Background

    This AC is on the subject of vibration tests and surveys, and was 
identified as one where differences existed between the Joint Aviation 
Requirements--Engines, and part 33 of the Federal Aviation Regulations 
(FAR's). A study group composed of representatives of the Federal 
Aviation Administration, the Joint Aviation Authorities, Transport 
Canada and industry worked to produce a set of improved and harmonized 
requirements that was subsequently incorporated into part 33 of the 
FAR.
    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 April 18, 1995 (60 FR 19442), 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 new requirements that were published in the 
Federal Register on June 4, 1996 (61 FR 28430).

    Issued in Burlington, Massachusetts, on March 25, 1997.
James C. Jones,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 97-8278 Filed 4-1-97; 8:45 am]
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