Air carrier flight crew worries they were distraction and landed without clearance.

Attributes
ACN	446550
Time
Date	199908
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d01.tracon tower : den.tower
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing : roll
Route In Use	approach : visual arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 200 flight time total : 9500 flight time type : 2000
ASRS Report	446550
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 90 flight time total : 3000 flight time type : 300
ASRS Report	446696
Events
Anomaly	incursion : landing without clearance non adherence : far non adherence : published procedure
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Arrival into den, vectored to runway 16 for visual landing on approximately 3 mi final, told to switch to tower. Made frequency change just as we got a GS warning due to runway 16 GS notamed out of service. With that distraction and a close-in final approach, we landed, possibly, without tower clearance. We were the only aircraft on the approach frequency and never heard any other aircraft on the frequency. Upon landing, I switched to ground control frequency, flipped the selector switch, and contacted ground for taxi instructions to the gate. Throughout the final approach, landing and rollout, no one contacted us. After taxiing in to the ramp, neither the first officer or I could remember whether or not we had actually called the tower. Even with our SOP's for callouts at 1000 ft AGL, one of our confirmations is that we are 'cleared to land' which we both confirmed. Possibly the lack of any radio 'chatter' can be as much of a distraction as too much noise on the frequency or 'in cockpit' distrs as well!

Original NASA ASRS Text

Title: ACR FLC WORRIES THEY WERE DISTR AND LANDED WITHOUT CLRNC.

Narrative: ARR INTO DEN, VECTORED TO RWY 16 FOR VISUAL LNDG ON APPROX 3 MI FINAL, TOLD TO SWITCH TO TWR. MADE FREQ CHANGE JUST AS WE GOT A GS WARNING DUE TO RWY 16 GS NOTAMED OUT OF SVC. WITH THAT DISTR AND A CLOSE-IN FINAL APCH, WE LANDED, POSSIBLY, WITHOUT TWR CLRNC. WE WERE THE ONLY ACFT ON THE APCH FREQ AND NEVER HEARD ANY OTHER ACFT ON THE FREQ. UPON LNDG, I SWITCHED TO GND CTL FREQ, FLIPPED THE SELECTOR SWITCH, AND CONTACTED GND FOR TAXI INSTRUCTIONS TO THE GATE. THROUGHOUT THE FINAL APCH, LNDG AND ROLLOUT, NO ONE CONTACTED US. AFTER TAXIING IN TO THE RAMP, NEITHER THE FO OR I COULD REMEMBER WHETHER OR NOT WE HAD ACTUALLY CALLED THE TWR. EVEN WITH OUR SOP'S FOR CALLOUTS AT 1000 FT AGL, ONE OF OUR CONFIRMATIONS IS THAT WE ARE 'CLRED TO LAND' WHICH WE BOTH CONFIRMED. POSSIBLY THE LACK OF ANY RADIO 'CHATTER' CAN BE AS MUCH OF A DISTR AS TOO MUCH NOISE ON THE FREQ OR 'IN COCKPIT' DISTRS AS WELL!

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.