Unauthorized landing. Clearance landing not received as frequency change missed late.

Attributes
ACN	255019
Time
Date	199310
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : tpa
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : tpa
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : straight in approach : visual
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 160 flight time total : 5450 flight time type : 2600
ASRS Report	255019
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	incursion : landing without clearance non adherence : far non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We asked for and were cleared for the visual approach to tpa runway 18L from about 7 mi out. That's the last transmission I recall hearing. I also don't remember him telling us to contact the tower. After being cleared, I concentrated on the before landing checklist with a new copilot, who had experience as a captain in the military, but was getting used to our procedures. We joined the ILS and were going through callouts and procedures during an ILS. Before I knew it, we were on the ground and I noticed we were still on approach frequency. We called ground and he cleared us to taxi to the FBO. Ground didn't say anything about not contacting tower before landing. At night in tampa the approach and tower are manned by the same person and that may be why it didn't occur to me during the approach to contact tower. I don't know what time they change over to 1 person doing both. He may have cleared us for the visual and to land at the same time. I just can't recall. If approach did ask us to go to tower, we never answered and he should have called us again.

Original NASA ASRS Text

Title: UNAUTH LNDG. CLRNC LNDG NOT RECEIVED AS FREQ CHANGE MISSED LATE.

Narrative: WE ASKED FOR AND WERE CLRED FOR THE VISUAL APCH TO TPA RWY 18L FROM ABOUT 7 MI OUT. THAT'S THE LAST XMISSION I RECALL HEARING. I ALSO DON'T REMEMBER HIM TELLING US TO CONTACT THE TWR. AFTER BEING CLRED, I CONCENTRATED ON THE BEFORE LNDG CHKLIST WITH A NEW COPLT, WHO HAD EXPERIENCE AS A CAPT IN THE MIL, BUT WAS GETTING USED TO OUR PROCS. WE JOINED THE ILS AND WERE GOING THROUGH CALLOUTS AND PROCS DURING AN ILS. BEFORE I KNEW IT, WE WERE ON THE GND AND I NOTICED WE WERE STILL ON APCH FREQ. WE CALLED GND AND HE CLRED US TO TAXI TO THE FBO. GND DIDN'T SAY ANYTHING ABOUT NOT CONTACTING TWR BEFORE LNDG. AT NIGHT IN TAMPA THE APCH AND TWR ARE MANNED BY THE SAME PERSON AND THAT MAY BE WHY IT DIDN'T OCCUR TO ME DURING THE APCH TO CONTACT TWR. I DON'T KNOW WHAT TIME THEY CHANGE OVER TO 1 PERSON DOING BOTH. HE MAY HAVE CLRED US FOR THE VISUAL AND TO LAND AT THE SAME TIME. I JUST CAN'T RECALL. IF APCH DID ASK US TO GO TO TWR, WE NEVER ANSWERED AND HE SHOULD HAVE CALLED US AGAIN.

Data retrieved from NASA's ASRS site as of July 2007 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.