Last week, I received a "courtesy call" from a fellow at FAA HQ about several occurrences of a "Flight ID Mismatch" over the past 4 months, which happened to be since I installed a GPS 175 to feed gps data to my GDL-82. He started right off by stating,"No one's in trouble" and then spoke about the Flight ID Mismatch issues. At apparently random times, it happened on 6 out of my last 24 flights, all cross-countries, typically at Class C airports. The first 4 flights after the GPS 175 installation were not flagged. I pulled up all of the PAPR reports to see for myself. I couldn't pin it down to any particular ATC facility.
I use anonymous mode as often as I can. I had not filed a flight plan for any of the flights. On one report, it showed ADS-B ID: VFR and Flight Plan ID: X instead of N as the first character in my N-number. Another report showed ADS-B ID: VFR and Flight Plan ID: (blank). One page 4 of the report, it clearly states that: "The above FP ID Mismatch field can be disregarded when no flight plan was filed for the associated flight." Pointing that out to the FAA fellow on the phone didn"t make any difference to him.
I've talked to both Garmin and my avionics supplier without getting a definite resolution. I could also return to my prior setup using the internal gps on the GDL-82, which worked without error for the prior 3 years. Not looking to dump on anyone, just looking to compare notes with someone with a similar situation.
I use anonymous mode as often as I can. I had not filed a flight plan for any of the flights. On one report, it showed ADS-B ID: VFR and Flight Plan ID: X instead of N as the first character in my N-number. Another report showed ADS-B ID: VFR and Flight Plan ID: (blank). One page 4 of the report, it clearly states that: "The above FP ID Mismatch field can be disregarded when no flight plan was filed for the associated flight." Pointing that out to the FAA fellow on the phone didn"t make any difference to him.
I've talked to both Garmin and my avionics supplier without getting a definite resolution. I could also return to my prior setup using the internal gps on the GDL-82, which worked without error for the prior 3 years. Not looking to dump on anyone, just looking to compare notes with someone with a similar situation.