[Federal Register Volume 63, Number 98 (Thursday, May 21, 1998)]
[Notices]
[Page 28023]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-13578]



[[Page 28023]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Draft Advisory Circular (AC) No. 120-28D, Criteria for Approval 
of Category III Weather Minima for Takeoff, Landing, and Rollout

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of availability of a draft advisory circular.

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SUMMARY: This notice announces the availability of a draft AC, 
recommended by the Aviation Rulemaking Advisory Committee (ARCA), which 
provides information and guidance on obtaining and maintaining approval 
of Category III landing weather minima and low visibility takeoff 
criteria, including the installation and approval of associated 
aircraft systems. This draft AC would incorporate changes to AC 20-57 
resulting from the harmonization efforts of the Federal Aviation 
Administration, European Joint Aviation Authority and other regulatory 
authorities. This notice solicits public comment on the draft AC.

DATES: Comments on the draft AC must be received on or before July 20, 
1998.

ADDRESSES: Send all comments on the draft AC to Jim Enias, Technical 
Programs Division (AFS-400), Room 835, Federal Aviation Administration, 
800 Independence Ave., SW., Washington DC 20591.

FOR FURTHER INFORMATION CONTACT:
Jim Enias, Technical Programs Division (AFS-400), Federal Aviation 
Administration, Independence Avenue, SW., Washington, DC 20591, 
Telephone (202) 267-7211.

Comments Invited

    The FAA invites interested parties to submit comments on this draft 
AC, as recommended by the ARAC. Commenters should identify AC 120-28D 
and submit comments to the person and address listed above. The FAA 
will consider all communications received on or before the closing date 
for comments before completing its review of this ARAC recommended AC. 
The recommended draft AC and comments received may be inspected at the 
Office of Flight Standards Service, Technical Programs Division, Room 
935, Federal Aviation Administration (Federal Office Building 10A), 
between the hours of 9 a.m. and 5 p.m. weekdays, except Federal 
holidays.

Background

    This draft AC was received from the ARAC on December 15, 1997. The 
AC recommended by the ARAC would set forth an acceptable means, but not 
the only means, of obtaining and maintaining approval of operations in 
Category III landing weather minima and low visibility takeoff criteria 
including the installation and approval of associated aircraft systems. 
It includes additional or revised Category III criteria for use in 
conjunction with heads-up displays, satellite navigation systems, low 
visibility takeoff guidance systems, wide-body fail passive operations, 
and use of Category III criteria during certain engine inoperative 
operations.
    This draft AC should be reviewed in conjunction with the regulatory 
requirements of 14 CFR parts 121, 125, and 135, as applicable. This 
draft AC would not change, add, or delete any regulatory requirement or 
authorize any deviation from parts 121, 125, or 135.
    This draft revision also updates and incorporates provisions of the 
former AC 20-57 into AC 120-28, since AC 20-57's former provisions are 
directly related to and dependent on criteria provided in the draft AC.
    The FAA is currently reviewing this ARAC recommendation and may 
make revisions to this document before it is issued. These revisions 
may include editorial changes to ensure that this AC does not impose 
requirements on operators independent of the current regulations. The 
regulations themselves, referenced in the draft AC, may be reviewed for 
revisions, as appropriate. It should be noted that the draft AC 
explicitly states that nothing in it is intended to preclude an 
operator from proposing and demonstrating to the FAA its ability to 
operate to Category III minima with a different equipment 
configuration, or alternatively to an RVR minima lower than presently 
described in this document.
    If, after review of this recommendation, the FAA decides to make 
any substantive changes in the draft AC, the revised document will be 
made available again for comment before final issuance.
    This draft revision incorporates changes resulting from the first 
steps toward international all weather operations criteria 
harmonization taken by the FAA, JAA, and several other regulatory 
authorities. Subsequent revisions of this AC are planned as additional 
all weather operations harmonization items are agreed and completed by 
FAA and JAA, or internationally.

    Issued in Washington, DC on May 15, 1998.
Thomas E. Stuckey,
Acting Director, Flight Standards Service.
[FR Doc. 98-13578 Filed 5-20-98; 8:45 am]
BILLING CODE 4910-13-M