Narrative:

While flying into ZZZ on a special VFR clearance. I was handed over to ZZZ tower by approach control. I contacted the tower reporting my position. I was asked if I was landing on the lake or strip. I advised I was landing on the strip and had the current ATIS advising [that] the strip was okay for ski equipped aircraft. My plane is equipped with 3 straight skis. I also advised I would be discharging a passenger and wanted to depart out of the control zone. I received approval to land. On final; I asked tower again if the runway was good for ski equipped aircraft. It appeared some sections were ice covered and the edges quite dark. Tower replied affirmative. I touched down and rolled (slid) out to approx. Mid field and came to a stop on bare gravel. The airplane was stopped mid field without any ability to move. My passenger exited the plane and started to rock my wings while I applied power to try to relocate. The aircraft was not moving due to being on bare gravel and having 3 skis. My passenger exited the 50 feet to my left and was walking away when the tower told me I had a pilot deviation and needed to call the tower. Using full power and rocking the plane with all I had; the plane slid and hopped to the apron and on ice. I shutdown the aircraft and called the tower on the phone. I was told I had unlawfully discharged a passenger on an active runway and the airport police were on the way. I explained the passenger only was outside the plane to help me get it moving but was told to remain where I was and the airport police were on their way. I told the tower the runway was plowed to bare gravel and was not ok for skis and was told that was an airport maintenance issue and had nothing to do with the tower. I watched the airport police drive by and disappear down the road and watched an airport maintenance vehicle appear and drive the full length of the runway and disappear off the apron and depart the area. I again called the tower to tell them I was waiting for the police and was advised they had already talked to me. I had talked to my passenger and no one else. I called the tower again on the phone again and asked if I could get a clearance out of the control zone to the north and was advised it would be VFR in 2 minutes. I reboarded the aircraft and after obtaining clearance I departed on the small patch of snow remaining.

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Original NASA ASRS Text

Title: C172 pilot and flight instructor reported landing with skis resulted in a runway incursion after becoming immobile and off loading the instructor on the runway.

Narrative: While Flying into ZZZ on a special VFR clearance. I was handed over to ZZZ Tower by Approach Control. I contacted the Tower reporting my position. I was asked if I was landing on the lake or strip. I advised I was landing on the strip and had the current ATIS advising [that] the strip was okay for SKI equipped aircraft. My plane is equipped with 3 straight skis. I also advised I would be discharging a passenger and wanted to depart out of the control zone. I received approval to land. On final; I asked Tower again if the runway was good for ski equipped aircraft. It appeared some sections were ice covered and the edges quite dark. Tower replied affirmative. I touched down and rolled (slid) out to approx. mid field and came to a stop on bare gravel. The airplane was stopped mid field without any ability to move. My passenger exited the plane and started to rock my wings while I applied power to try to relocate. The aircraft was not moving due to being on bare gravel and having 3 skis. My passenger exited the 50 feet to my left and was walking away when the Tower told me I had a pilot deviation and needed to call the Tower. Using full power and rocking the plane with all I had; the plane slid and hopped to the apron and on ice. I shutdown the aircraft and called the Tower on the phone. I was told I had unlawfully discharged a passenger on an active runway and the airport police were on the way. I explained the passenger only was outside the plane to help me get it moving but was told to remain where I was and the airport police were on their way. I told the Tower the runway was plowed to bare gravel and was not OK for skis and was told that was an Airport Maintenance issue and had nothing to do with the Tower. I watched the airport police drive by and disappear down the road and watched an Airport Maintenance vehicle appear and drive the full length of the runway and disappear off the apron and depart the area. I again called the Tower to tell them I was waiting for the police and was advised they had already talked to me. I had talked to my passenger and no one else. I called the Tower again on the phone again and asked if I could get a clearance out of the control zone to the north and was advised it would be VFR in 2 minutes. I reboarded the aircraft and after obtaining clearance I departed on the small patch of snow remaining.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.