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from U.S. Federal Aviation Regulations,
ACs and TSOs; RTCA industry documents; and
SAE International Aerospace Recommended
Practices.
Guidance for Approved Model List (AML)
Supplemental Type Certifi cate (STC) Approval
of Part 23 Airplane Avionics Installations.
U.S. Federal Aviation Administration (FAA)
Advisory Circular (AC) 23-22. Jan. 27, 2005.
Figures, appendixes, references, glossary.
42 pp. Available from FAA via the Internet
at <www.airweb.faa.gov> or from FAA by
mail.****
This AC offers guidelines for using the AML
STC process to obtain installation approval
4 6 FLIGHT SAFETY FOUNDATION • FLIGHT SAFETY DIGEST • JUNE 2005
R E S O U R C E S
of avionics in airplanes certifi cated under Part 23
of the U.S. Federal Aviation Regulations. Guidance
information addresses the following topics:
• Avionics eligible for the AML STC process;
• The model qualification process used by the
STC holder and FAA to either create or edit
the AML; and,
• The level of detail required for installation
instructions for an AML STC certificate,
including a list of acceptable equipment that
can be integrated under the STC.
FAA says that this AC augments and clarifi es
information provided in certain FAA ACs,
Orders, Notices and policy statements. Affected
documents are identifi ed, as are related FAA
documents.
A generic model of the qualification process,
diagrams and sample documents are included to
aid FAA personnel, equipment manufacturers and
avionics-equipment installers.
Minimum Flight Crew. U.S. Federal Aviation
Administration (FAA) Advisory Circular (AC)
23.1523. Jan. 12, 2005. Figures, appendixes,
references. 30 pp. Available from FAA via
the Internet at <www.airweb.faa.gov> or
from the U.S. Department of Transportation
(USDOT).*****
This AC describes an acceptable method that
may be used to show compliance with certifi
cation requirements for minimum fl ight crew
on aircraft certifi ed under U.S. Federal Aviation
Regulations Part 23, Airworthiness standards:
Normal, utility, acrobatic and commuter category
airplanes. The method described is neither mandatory
nor regulatory, and it may be used to determine
workload factors and related issues for
Part 23 airplanes.
The AC says, “Historically, the majority of Part
23 airplanes have been certifi ed for single-pilot
operation. It is not expected that this situation
will change, as most of the newly developed Part
23 airplanes are being designed from the onset to
be operated as a single-pilot airplane.”
The AC recommends evaluation criteria for
single-pilot commuter-category operations for
adequacy of cockpit layouts, display formats, information
presentation, control operations and
system-operation logic to support single-pilot
operation. The AC says that FAA encourages
participation and coordination from airplane
manufacturers and modifi ers, fl ight test pilots
and engineers, design-evaluation engineers and
human factors–evaluation engineers, and FAA
designees.
Information in the AC and annotated reference
materials (regulations, books, reports, journal
articles and forms) discuss topics such as performance
measures, measurement and assessment
techniques, comparison of workload measures,
workload and errors, and data collection. ■
Sources
* Documedia Solutions
37 Windsor Street
Cheltenham, Gloucester GL52 2DG U.K.
Internet: <www.documedia.co.uk>
** National Technical Information Service (NTIS)
5285 Port Royal Road
Springfi eld, VA 22161 U.S.
Internet: <www.ntis.gov>
*** The Stationery Offi ce (TSO)
P.O. Box 29
Norwich NR3 1GN U.K.
Internet: <www.tso.co.uk>
**** U.S. Federal Aviation Administration
800 Independence Avenue SW
Washington, D.C. 20591 U.S.
Internet: <www.faa.gov>
***** U.S. Department of Transportation
Subsequent Distribution Offi ce, M-30
Ardmore East Business Center
3341 Q 75th Ave.
Landover, MD 20785 U.S.
LIBRARY
FLIGHT SAFETY FOUNDATION • FLIGHT SAFETY DIGEST • JUNE 2005 47
B-737 Enters Excessive Descent
Rate During Coupled ILS Approach
The Australian Transport Safety Bureau report said that a number of factors led the flight crew to
believe that the instrument landing system was usable although a notice to airmen advised that
the glideslope was being tested and was not to be used for navigation.
— FSF EDITORIAL STAFF
The following information provides an
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