Cessna 150
Flight Crew Private
Flight Crew Last 90 Days 50; Flight Crew Total 3500; Flight Crew Type 3300
ATC Issue All Types; Ground Event / Encounter Other / Unknown
General None Reported / Taken
Procedure
VFR flight from to DSV. Aircraft is equipped with Automatic Dependent Surveillance-Broadcast (ADS-B) In and Out. During both flights and multiple times each flight Traffic Information System (TIS) traffic was not displayed in spite of the receiver indicating a good ADS-B signal. I spoke with a radar technician at ROC TRACON and inquired if there had been any equipment malfunctions with TIS. He checked the equipment logs and advised that the Hornell ADS-B Ground Station (4G6) indicated frequent data loss. I found no NOTAM issued by ITT as required. ITT did not notify ROC Tech Ops as required. Situation went unresolved until at least [two days later].Contractor (ITT) should be compelled to notify all users when a malfunction occurs.
C150 pilot expressed concern that ADS-B outages are not always NOTAMed properly.