Avionics News March 2018 - 58

industry

Don't lose your
ADS-B traffic

PAPR
Chase

STORY AND PHOTOS BY JOHN CROFT, FAA NEXTGEN OUTREACH AND REPORTING

P

ilots accustomed to receiving live ADS-B
traffic updates from FAA radar through the
Traffic Information Service-Broadcast will feel blind -
and less safe - if that service gets shut off. But that is
exactly what might happen if their ADS-B equipment is
transmitting hazardous information or performing incorrectly during a given number of flights.
Under a change to the ADS-B ground infrastructure
software made in mid-December, aircraft flagged by the
Federal Aviation Administration's ADS-B performance
monitoring system as not complying with the criteria
spelled out in the ADS-B rule could be placed on a No
Services Aircraft List, or NSAL. Once on the list, the
aircraft will no longer receive traffic from FAA radar
through the TIS-B uplink, and the aircraft's ADS-B information will not be displayed on controllers' screens.
While the onboard ADS-B equipment itself does not
alert pilots to such errors, the FAA's Public ADS-B Performance Report, or PAPR (pronounced "paper"), does.
The agency is asking equipped pilots to check their systems
regularly using the PAPR, a free check completed online at
58

avionics news

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march

2018

https://adsbperformance.faa.gov/PAPRRequest.aspx after a
flight in airspace with ADS-B coverage. Pilots receive
the analysis, which rates the actual performance compared to ADS-B specifications, through email shortly after submitting the request.
"Understanding the issues we're seeing with ADSB avionics over the past three years, I recommend that
pilots who are flying every weekend check their ADSB performance every fourth or fifth flight," said James
Marks, the FAA's ADS-B Focus Team lead. Typical issues include aircraft transmitting the wrong ICAO codes
(a fixed number set during aircraft registration), wrong
flight identification (tail number), incorrect air-ground
registration (the ADS-B unit reporting that the aircraft is
in the air when it is on the ground, and vice versa) and
position errors.
Marks notes that an ADS-B system is more complex
than a transponder, and its performance is dependent not
only on the properly functioning and configured avionics but also dependent on the availability of GPS/WAAS
services, the FAA's ADS-B ground infrastructure and its


https://adsbperformance.faa.gov/PAPRRequest.aspx

Table of Contents for the Digital Edition of Avionics News March 2018

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Avionics News March 2018 - 1
Avionics News March 2018 - No label
Avionics News March 2018 - Cover2
Avionics News March 2018 - 1
Avionics News March 2018 - 2
Avionics News March 2018 - 3
Avionics News March 2018 - 4
Avionics News March 2018 - 5
Avionics News March 2018 - 6
Avionics News March 2018 - 7
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Avionics News March 2018 - Cover3
Avionics News March 2018 - Cover4
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