[Federal Register Volume 63, Number 173 (Tuesday, September 8, 1998)]
[Notices]
[Page 47544]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-23786]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Proposed Revisions to Advisory Circular--Equipment, Systems, and 
Installations in Part 23 Airplanes

AGENCY: Federal Aviation Administration, DOT.

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

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SUMMARY: This notice requests comments regarding proposed revisions to 
Advisory Circular (AC) 23.1309-1C, ``Equipment, Systems, and 
Installations in Part 23 Airplanes.'' The AC provides guidance and 
information for an acceptable means for showing compliance with the 
requirements of Sec. 23.1309(a) and (b) (Amendment 23-49) for 
equipment, systems, and installations in Title 14 CFR Part 23 
airplanes. The AC defines the appropriate airplane systems probability 
levels for airplanes designed to 14 CFR Part 23 standards.

DATES: Comments must be received on or before November 4, 1998.

ADDRESSES: Send all comments on the proposed AC revisions to the 
Federal Aviation Administration, Attention: Ervin Dvorak, ACE-111, 
Regulations and Policy Branch, Small Airplane Directorate, Aircraft 
Certification Service, 601 East 12th Street, Kansas City, Missouri 
64106.

FOR FURTHER INFORMATION CONTACT: Terre Flynn, Regulations and Policy 
Branch, ACE-111, at the above address, telephone number (816) 426-6941, 
or facsimile (816) 426-2169.

SUPPLEMENTARY INFORMATION:

Comments Invited

    A copy of the proposed revisions to the AC may be obtained by 
contacting the person name above under FOR FURTHER INFORMATION CONTACT. 
Interested persons are invited to comment on the proposed AC revisions 
by submitting comments to the address specified above. All comments 
received on or before the closing date will be considered by the Small 
Airplane Directorate, 1201 Walnut, Room 900, Kansas City, Missouri 
64106, between 7:30 a.m. and 4:00 p.m. weekdays, except Federal 
holidays.

Background

    This AC includes a matrix that categorizes new certification 
probability levels for four certification classes of Part 23 airplanes. 
The four certification classes of airplanes are as follows: Class I 
(typically single, reciprocating engine airplanes under 6,000 pounds), 
Class II (typically multi, reciprocating engine and single-engine 
turbine airplanes under 6,000 pounds), Class III (typically airplanes 
over 6,000 pounds), and Class IV (typically commuter category). Also, 
the related Software Development Assurance Levels for the various 
Failure Conditions for each certification class are part of the matrix. 
The Small Airplane Directorate based the new probability levels on 
historical accident data for each class.

    Issued in Kansas City, Missouri, on August 27, 1998.
James E. Jackson,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 98-23786 Filed 9-4-98; 8:45 am]
BILLING CODE 4910-13-M