[Federal Register: June 25, 2001 (Volume 66, Number 122)]
[Notices]
[Page 33736]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr25jn01-119]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
[Policy Statement No. ANM-01-111-159]
All-Electrical Attitude, Altitude, Direction, and Airspeed
Systems Using Battery Standby Power
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed policy statement; request for comments.
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SUMMARY: The Federal Aviation Administration (FAA) announces the
availability of a proposed policy statement that clarifies current FAA
certification policy with respect to all-electrical attitude, altitude,
direction, and airspeed systems using battery standby power.
DATES: Send your comments on or before July 25, 2001.
ADDRESSES: Address your comments to the individual identified under FOR
FURTHER INFORMATION CONTACT.
FOR FURTHER INFORMATION CONTACT: Dale Dunford, Federal Aviation
Administration, Transport Airplane Directorate, Transport Standards
Staff, Airplane and Flight Crew Interface Branch, ANM-111, 1601 Lind
Avenue SW., Renton, WA 98055-4056.; telephone (425) 227-2239; fax (425)
227-1100; e-mail: dale.dunford@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
The proposed policy statement is available on the Internet at the
following address: http://www.faa.gov/avr/air/anm/draftpolicy/
interim.htm. If you do not have access to the Internet, you can obtain
a copy of the policy statement by contacting the person listed under
FOR FURTHER INFORMATION CONTACT.
The FAA invites your comments on this proposed policy statement. We
will accept your comments, data, views, or arguments by letter, fax, or
e-mail. Send your comments to the person indicated in FOR FURTHER
INFORMATION CONTACT. Mark your comments, ``Comments to Policy Statement
ANM-01-111-159.''
Use the following format when preparing your comments:
Organize your comments issue-by-issue.
For each issue, state what specific change you are
requesting to the proposed general statement of policy.
Include justification, reasons, or data for each change
you are requesting.
We also welcome comments in support of the proposed policy.
We will consider all communications received on or before the
closing date for comments. We may change the proposed policy because of
the comments received.
Background
With the advent of highly reliable, low power, liquid crystal
display (LCD) electrical indicators, applicants for certification of
transport category airplanes and their components are replacing
previous pneumatic indicators with electric ones, resulting in an all-
electric attitude, altitude, direction, or airspeed configuration. Many
of these installations rely on time-limited batteries to power the
instruments in the event of loss of generator power on the airplane.
Such all-electric configurations must be designed to ensure continued
safe flight and landing after any failure or combination of failures
not shown to be extremely improbable, including the loss of generated
electrical power.
The proposed policy statement provides guidelines that should be
used for the certification of flight instrument installations in which
All displays of any of the essential flight information
(e.g., altitude, attitude, airspeed, or direction) require electrical
power,
The failure of normal electrical power is not extremely
improbable, and
The back-up source of electrical power is a time-limited
battery.
Issued in Renton, Washington, on June 19, 2001.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 01-15898 Filed 6-22-01; 8:45 am]
BILLING CODE 4910-13-U