[Federal Register Volume 65, Number 17 (Wednesday, January 26, 2000)]
[Notices]
[Page 4296]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 00-1818]



[[Page 4296]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Proposed Advisory Circular; Compliance Criteria for 14 CFR 33.28, 
Aircraft Engines, Electrical and Electronic Engine Control Systems

AGENCY:  Federal Aviation Administration, DOT.

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

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SUMMARY:  This notice announces the availability of proposed Advisory 
Circular (AC) No. 33.28-1, Compliance Criteria for 14 CFR 33.28, 
Aircraft Engines, Electrical and Electronic Engine Control Systems.

DATES:  Comments must be received on or before April 25, 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:  Cosimo Bosco, Engine and Propeller 
Standards Staff, ANE-110, at the above address, telephone (781) 238-
7118, fax (781) 238-7199.

SUPPLEMENTARY INFORMATION:

Comments Invited

    A copy of the subject Act may be obtained by contacting the person 
named above 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. Commenters must identify the 
subject of the AC and submit comments in duplicate 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 proposed AC provides guidance material for methods of 
complying with Sec. 33.28, Electrical and Electronic Control (EEC) 
Systems. Initially, EEC technology was primarily applied to engines 
designed for large transport aircraft applications; the certification 
practice and implementation of Sec. 33.28 was oriented toward these 
applications. When the use of EEC technology was limited to a small 
group of manufacturers, the information and guidance provided in the 
rule itself was adequate. However, with the proliferation of EEC 
controls, the need for additional advisory material has become evident 
in several recent engine certification programs. Additionally, industry 
representatives that design engines for applications other than large 
transport aircraft certificated under part 25 have questioned the 
criteria used to determine equivalence to the typical hydromechanical 
systems.

(Authority: 49 U.S.C. 106(g), 40113, 44701-44702, 44704.)

    Issued in Burlington, Massachusetts, on January 14, 2000.
David A. Downey,
Assistant Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 00-1818 Filed 1-25-00; 8:45 am]
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