[Federal Register: December 9, 1999 (Volume 64, Number 236)]
[Notices]               
[Page 69063-69064]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr09de99-159]                         

=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

 
Proposed Advisory Circular; Damage Tolerance for High Energy 
Turbine Engine Rotors

AGENCY: Federal Aviation Administration, DOT.

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

-----------------------------------------------------------------------

SUMMARY: This notice announces the availability of draft Advisory 
Circular (AC), No. 33.14-1, Damage Tolerance for High Energy Turbine 
engine Rotors.

DATES: Comments must be received on or before January 10, 2000.

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, MA 01803-5299.

FOR FURTHER INFORMATION CONTACT: Tim Mouzakis, Engine and Propeller 
Standards Staff, ANE-110, at the above address, telephone (781) 238-
7114, fax (781) 238-7199.


[[Page 69064]]


SUPPLEMENTARY INFORMATION: 

Comments Invited

    A copy of the draft AC may be obtained by contacting the person 
named 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. Comments must identify the subject 
of the AC, and submit comments 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 advisory circular (AC) provides guidance and information on 
acceptable methods, but not the only methods of compliance with 
Sec. 33.14 of the Federal Aviation Regulations, title 14 of the Code of 
Federal Regulations. Section 33.14 contains requirements of life 
management requirements applicable to the design and life management of 
titanium alloy high energy rotating parts of aircraft engines. Although 
this AC does refer to regulatory requirements that are mandatory, this 
AC is not, in itself, mandatory. This AC neither changes any regulatory 
requirements nor authorizes changes in or deviations from the 
regulatory requirements.
    This advisory circular would be published under the authority 
granted to the Administrator by 49 U.S.C. 106(g), 40113, 44701-44702, 
44704 and would provide guidance for the requirements in 14 CFR part 
33.

    Issued in Burlington, Massachusetts, on December 2, 1999.
Ronald L. Vavruska,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 99-31981 Filed 12-8-99; 8:45 am]
BILLING CODE 4910-13-M