Avionics News June 2016 - 14
F R O M
R I C
P E R I
A EA V I C E P R ES I D E N T O F G OV E R N M E N T & I N D U ST RY A F FA I RS
The Aircraft Electronics Association's international membership continues to grow. Currently, the AEA represents avionics
businesses in more than 40 countries throughout the world. To better serve the needs of the AEA's international membership,
the "International News and Regulatory Updates" section of Avionics News offers a greater focus on international regulatory
activity, international industry news and an international "Frequently Asked Questions" column to help promote standardization.
If you have comments about this section, send emails to avionicsnews@aea.net.
UNITED STATES
News & Regulatory Updates
Replacement of vacuum-driven attitude
indicators in 14 CFR Part 23/CAR 3
airplanes
On April 28, 2016, the Federal Aviation Administration
published a revision to its policy PS-ACE-23-08 regarding the
replacement of vacuum-driven attitude indicators in 14 CFR
Part 23/CAR 3 airplanes. This policy statement describes
acceptable compliance methods for replacing vacuum-driven
attitude instruments with electronically-driven replacement
indicators. The fundamental change in this revision is the
clarification that the policy is focused on a single-function
vacuum-driven attitude indicator being replaced with a singlefunction electronically-driven attitude indicator.
The policy states that for Part 23/CAR 3 aircraft under
6,000 pounds with vacuum-driven attitude instruments, it is
acceptable to replace vacuum-driven attitude instruments with
electronically-driven attitude indicators under the following
conditions:
1. A single-function vacuum-driven attitude
indicator may be replaced with a single-function
electronically-driven attitude indicator.
2. The electronically-driven attitude indicator has an
independent standby battery that is capable of at least
30 minutes of power to the new instrument in the
event of a loss of primary electrical power.
3. The final installation and arrangement must allow for
use of partial-panel techniques in the event of a loss
14
avionics news
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june
2016
of the electronically-driven attitude indicator source.
4. Compliance must meet all other applicable
regulations.
To install an electronically-driven attitude indicator as a
minor alteration, the above conditions and the following additional requirements must be met:
1. The electronically-driven attitude indicator must
fit into the existing location of the vacuum-driven
attitude indicator. The existing airspeed, altitude and
turn/bank indicators must remain in their originally
certificated or basic "T" locations. If any additional
openings or modifications to the instrument panel
are required to install the electronic instrument, the
following requirements must be met:
a. The instrument panel cannot be part of the
aircraft primary structure.
b. If the instrument panel is part of the
aircraft primary structure, the aircraft
manufacturer's instructions must include
instrument panel modification instructions.
2. The installation of the electronically-driven attitude
indicator requires only minor changes to the existing
electrical and vacuum connections to the aircraft, per
Part 43.
3. The electronically-driven attitude indicator must be
powered from a dedicated circuit breaker (or other
appropriate circuit protection device), and it must be
powered by an independent standby (backup) power
source capable of at least 30 minutes of power.
If an alteration is proposed that is outside of this policy,
further evaluation is needed to determine if it can be done
as a minor alteration, approved by designated engineer representative submitted data, an engineering-coordinated field
Table of Contents for the Digital Edition of Avionics News June 2016
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Avionics News June 2016 - Intro
Avionics News June 2016 - Cover1
Avionics News June 2016 - Cover2
Avionics News June 2016 - No label
Avionics News June 2016 - 2
Avionics News June 2016 - 3
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Avionics News June 2016 - 13
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Avionics News June 2016 - Cover3
Avionics News June 2016 - Cover4
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