Air carrier lands without clearance.

Attributes
ACN	300406
Time
Date	199503
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : den tower : den tower : iad
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 75 flight time total : 7000 flight time type : 50
ASRS Report	300406
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe incursion : landing without clearance non adherence : clearance non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified 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:

Flying into den we were given approach clearance about 90 degrees from the final approach course and told to contact tower at the OM being cautious of the 757 (preceding) wake turbulence. No other advisory was given. While turning on to final the TCASII called 'traffic.' both crewmembers looked for traffic, could see nothing. Next the TCASII called 'descend, descend now.' the first officer (flying) then began a descent (900 FPM) while I continued to look for the traffic. Somewhere near the OM the TCASII called 'traffic no longer a factor.' this was unnerving because we finally got the traffic in sight at this time, who was approaching on the adjacent parallel runway. This was the first time TCASII had issued a command while I was flying so I was going through my head what had happened to learn from this. At the same time I was making sure the first officer got and stayed above the 757's flight path. We saw the 757 clear the runway and no one else on the runway and landed without incident. When we were clearing the runway I noticed that we were still on approach frequency and had not received a landing clearance.

Original NASA ASRS Text

Title: ACR LANDS WITHOUT CLRNC.

Narrative: FLYING INTO DEN WE WERE GIVEN APCH CLRNC ABOUT 90 DEGS FROM THE FINAL APCH COURSE AND TOLD TO CONTACT TWR AT THE OM BEING CAUTIOUS OF THE 757 (PRECEDING) WAKE TURB. NO OTHER ADVISORY WAS GIVEN. WHILE TURNING ON TO FINAL THE TCASII CALLED 'TFC.' BOTH CREWMEMBERS LOOKED FOR TFC, COULD SEE NOTHING. NEXT THE TCASII CALLED 'DSND, DSND NOW.' THE FO (FLYING) THEN BEGAN A DSCNT (900 FPM) WHILE I CONTINUED TO LOOK FOR THE TFC. SOMEWHERE NEAR THE OM THE TCASII CALLED 'TFC NO LONGER A FACTOR.' THIS WAS UNNERVING BECAUSE WE FINALLY GOT THE TFC IN SIGHT AT THIS TIME, WHO WAS APCHING ON THE ADJACENT PARALLEL RWY. THIS WAS THE FIRST TIME TCASII HAD ISSUED A COMMAND WHILE I WAS FLYING SO I WAS GOING THROUGH MY HEAD WHAT HAD HAPPENED TO LEARN FROM THIS. AT THE SAME TIME I WAS MAKING SURE THE FO GOT AND STAYED ABOVE THE 757'S FLT PATH. WE SAW THE 757 CLR THE RWY AND NO ONE ELSE ON THE RWY AND LANDED WITHOUT INCIDENT. WHEN WE WERE CLRING THE RWY I NOTICED THAT WE WERE STILL ON APCH FREQ AND HAD NOT RECEIVED A LNDG CLRNC.

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.