[Federal Register Volume 61, Number 173 (Thursday, September 5, 1996)]
[Notices]
[Pages 46893-46894]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-22689]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Proposed Advisory Circular; Continued Airworthiness Assessments
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 Advisory Circular
(AC), no. 33.78-1, Turbine Engine Power-Loss And Instability In Extreme
Conditions Of Rain And Hail.
DATES: Comments must be received on or before November 7, 1996.
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:
Thomas Boudreau, Engine and Propeller Standards Staff, ANE-110, at the
above address, telephone (617) 238-7117, fax (617) 238-7199.
SUPPLEMENTARY INFORMATION:
Comments Invited
A copy of the subject AC 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 to 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.
[[Page 46894]]
Background
In 1988, the Aerospace Industries Association (AIA) initiated a
study of airplane turbine engine power-loss and instability phenomena
that were attributed to operating in inclement weather. AIA, working
with the Association European des Constructeurs de Materiel Aerospatial
(AECMA), concluded that a potential flight safety threat exists for
turbine engines installed on airplanes when operating in an extreme
rain or hail environment. AIA and AECMA further concluded that the rain
and hail ingestion requirements contained in section 33.77 do not
adequately address these threats. Consequently the Federal Aviation
Administration has issued a notice of proposed rulemaking (61 FR 41688,
dated August 9, 1996), proposing changes to the water and hail
ingestion standards.
This advisory circular, published under the authority granted to
the Administrator by 49 U.S.C. 106(g), 40113, 44701, 44702, 44704,
provides guidance for these proposed requirements.
Issued in Burlington, Massachusetts, on August 27, 1996.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification
Service.
[FR Doc. 96-22689 Filed 9-4-96; 8:45 am]
BILLING CODE 4910-13-M
