A failed FAA Public ADS-B Performance Report (PAPR) does not necessarily mean your ADS-B equipment is defective. In many cases, the issue is related to system configuration, installation, or data being transmitted incorrectly rather than a hardware failure.

Common causes of a failed or unsatisfactory PAPR include:

• Incorrect aircraft registration (N-number) or Flight ID
• Improper ICAO 24-bit aircraft address programming
• Incorrect aircraft emitter category
• GPS position source or accuracy issues
• Transponder or ADS-B software configuration errors
• Altitude encoder discrepancies
• Wiring or installation problems
• Outdated software or firmware
• Intermittent antenna or RF performance issues

Many of these issues can be corrected without replacing the existing equipment.

Because the PAPR evaluates how your ADS-B Out system actually performed during flight, it is an excellent diagnostic tool for identifying configuration or installation issues that may not be apparent during normal ground testing.

If your report identifies one or more failures, the first step is to have the report reviewed by an experienced avionics technician. In many cases, the issue can be resolved through proper troubleshooting, software updates, or system reconfiguration.

Southeast Aerospace can assist with interpreting PAPR reports, diagnosing ADS-B performance issues, and recommending the most practical corrective action. If a system is approaching obsolescence or no longer cost-effective to maintain, we can also help evaluate modern ADS-B upgrade options that improve both compliance and situational awareness.

After any ADS-B installation, repair, software update, or configuration change, it's a good practice to request a new PAPR following a qualifying flight. Verifying your system's performance before your next trip can help prevent unexpected compliance issues and ensure your equipment is operating as intended.

The FAA's Public ADS-B Performance Report (PAPR) is a free online tool that evaluates how well your aircraft's ADS-B Out system is performing during an actual flight. After a qualifying flight, aircraft owners, operators, or maintenance personnel can request a report that identifies whether the ADS-B installation is transmitting data correctly and meeting FAA performance requirements.

For additional information:

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

In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.

The KLN-94 is not a WAAS GPS, nor is it upgradeable to one. We recommend the KT-74, but if you decide to upgrade to a GPS400W or GNS430W, then you would want to go with a GTX-330.

Honeywell has obtained STC# SA00765DE for the installation of the KT-74 for ADS-B Out functionality in a multitude of aircraft.  There is an Approved Model List that accompanies the STC.  Please see Resources for copies of the STC.

The KT-74 is a direct replacement only if ADS-B is not being utilized. The KT-74 is designed to fit into an existing KT-76A/C & KT-78A tray. However to utilize the ADS-B feature of the KT-74, a secondary connector and new tray will need to be installed.

The KT-74 has two Molex edge connectors. The primary connector can use the same contact positions and are electrically compatible with the KT-76A & KT-78A (if properly wired). A secondary connector would need to be installed to utilize ADS-B functions, resulting in a necessary second hole in the rack to accommodate the connector.