TEMPORAL UPDATE SCHEMA FOR ELECTRONIC CHART DEPICTIONS

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AirCrafT CertificatioN
RTCA, SC-206
K. Morgan Mattison, MS FAA / AIR-130
July 18, 2005
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Certification GuidanceStatus

• AC 20-149
• TSO C-157
• Joint Advisory Circular Material

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AC 20-149

• Scope
• All FIS-B providers, both govt and non-govt
• Subnetwork independent
• Strategic flight planning purposes only
• Does not cover portable devices (eg EFBs)
• Safety Assessment Considerations
• Defines hazards based upon operational context
• Classifies hazards in FHA (minor)
• Allocates safety requirements
• Both air and ground
• Interoperability
• Normal operating procedures

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AC 20-149 Continued

• Human Factors Considerations
• Addresses proper use of color
• Mirrors Transport Airplane Directorate issue
  paper on same subject for Part 25 aircraft
• Status
• Public comment(s) disposition completed
• Awaiting final FAA Legal review
• Expect publication July-Aug 2005

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TSO C-157

• Published Sept 2004
• Reference RTCA DO-267A FIS-B MASPS
• Strategic flight planning purposes only

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Joint AC Material

• Combines Aircraft Certification and Flight
  Standards advisory circular material
• 20-149 Safety and Interop Requirements for
  Initial Domestic FIS-B
• 00-63 Use of Cockpit Displays of Digital Weather
  and Operational Information
• Current draft is a verbatim combination
• Can we synch up RTCA / FAA activities to capture
  needed updates ?

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Future UpDates Challenges

• Use of FIS-B information for real-time tactical
  maneuvering
• Impact to hazard class
• Loss (minor)
• Malfunction/Data integrity (major?)
• Human factors considerations
• Proper use of color (redux)
• Information freshness/product age
• Provider updates impacting airborne software
  developed to Level C criteria

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Conclusions

• DO-XXX AIS Tactical MASPS will introduce
  challenges related to higher hazard
  classification criteria
• Validated description of operational context
  imperative
• Functional performance and test conditions will
  need to account for user modifiable software
  limitations
• FIS-B provider updates
• HMI associated with FIS-B product age
• Proper use of color
• FAA and RTCA should seek to coordinate comments
  and recommendations to TSO and Advisory Circular
  update

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