[Federal Register Volume 62, Number 63 (Wednesday, April 2, 1997)]
[Notices]
[Page 15743]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-8372]


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DEPARTMENT OF TRANSPORTATION

Advisory Circular; Continued Rotation and Rotor Locking

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of issuance Advisory Circular (AC) on turbine engine 
continued rotation and rotor locking.

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SUMMARY: This notice announces the issuance of Advisory Circular (AC), 
No. 33.74/92, Turbine Engine Continued Rotation and Rotor Locking. This 
AC is combining part 33 sections 33.74 and 33.92. This AC is on the 
subject of continued rotation and rotor locking tests. 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. 33.74/92, was issued by the new England 
Aircraft Certification Service, Engine and Propeller Directorate on 
February 14, 1997.

FOR FURTHER INFORMATION CONTACT: Marc Bouthillier, Engine and Propeller 
Standards Staff, ANE-110, 12 New England Executive Park, Burlington, 
MA, 01803, telephone (617) 238-7117, fax (617) 238-7120.

SUPPLEMENTARY INFORMATION:

Background

    This AC is on the subject of turbine engine continued rotation and 
rotor locking tests that were 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 26, 1997.
James C. Jones,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 97-8372 Filed 4-1-97; 8:45 am]
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