ZLC controller reports of switching an aircraft over to tower; then at 300 feet the aircraft reports...

Narrative:

I was the radar controller working an average session on sector 16; the jackson hole sector. Aircraft X was arriving to jac; everything was a standard flight. At XX00 I cleared him for an RNAV Z approach for runway 19 into jackson hole. At xx+03 I terminated his radar and told him to contact tower at 118.07. He read that back correct. At xx+13 he came onto my frequency and said he just broke out 300 feet from surface and can see the airport. I was surprised to be talking to him; so I asked if that was aircraft X. He said it was; I again told him to contact tower. I called tower about a minute later to inquire. They said they had never talked to him until he came over at xx+13 basically on the ground. Come to find out there was a snowplow on the runway and aircraft X apparently came to a stop within 15 feet of the snowplow. I finished the session; and told management what happened. They reviewed the tape; and I did indeed tell him to contact tower on the correct frequency; and the pilot had a correct read back. I don't know what happened; whether the pilot forgot to contact tower; or tower couldn't hear him; who knows. But it could have been bad.pilot should switch frequencies when told. Tower could advise center when snow plows are out; and maybe be more concerned if they haven't heard from an aircraft they know is landing soon.

Original NASA ASRS Text

Title: ZLC Controller reports of switching an aircraft over to Tower; then at 300 feet the aircraft reports to the Center Controller that he just broke out and can see the runway. Pilot did not switch to Tower frequency and landed on a runway with a snowplow on it.

Narrative: I was the radar controller working an average session on sector 16; the Jackson Hole sector. Aircraft X was arriving to JAC; everything was a standard flight. At XX00 I cleared him for an RNAV Z approach for runway 19 into Jackson Hole. At XX+03 I terminated his radar and told him to contact tower at 118.07. He read that back correct. At XX+13 he came onto my frequency and said he just broke out 300 feet from surface and can see the airport. I was surprised to be talking to him; so I asked if that was Aircraft X. He said it was; I again told him to contact tower. I called tower about a minute later to inquire. They said they had never talked to him until he came over at XX+13 basically on the ground. Come to find out there was a snowplow on the runway and Aircraft X apparently came to a stop within 15 feet of the snowplow. I finished the session; and told management what happened. They reviewed the tape; and I did indeed tell him to contact tower on the correct frequency; and the pilot had a correct read back. I don't know what happened; whether the pilot forgot to contact tower; or tower couldn't hear him; who knows. But it could have been bad.Pilot should switch frequencies when told. Tower could advise center when snow plows are out; and maybe be more concerned if they haven't heard from an aircraft they know is landing soon.

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.

Attributes
ACN	1232742
Time
Date	201501
Local Time Of Day	1801-2400
Place
Locale Reference	ZLC.ARTCC
State Reference	UT
Environment
Light	Night
Aircraft 1
Make Model Name	Light Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Landing
Route In Use	Other Instrument Approach
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 4
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Critical Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

ZLC controller reports of switching an aircraft over to tower; then at 300 feet the aircraft reports to the center controller that he just broke out and can see the runway. Pilot did not switch to tower frequency and landed on a runway with a snowplow on it.