Flight crew lands at las without clearance.

Attributes
ACN	434720
Time
Date	199904
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : las.airport
State Reference	NV
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : las.tower
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	landing : roll
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 11000 flight time type : 8000
ASRS Report	434720
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 2000
ASRS Report	435006
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We had a yellow leading edge flap transit light in tucson that we finally fixed by doing a flaps 15 degree takeoff. As we were approaching las, we were concerned about the light, and began to discuss it as approach called out traffic we were to follow. We visually acquired the aircraft, and approach asked us to maintain visual. At this time my first officer asked me if we should lower flaps to see if the light would stay yellow. A discussion ensued until I finally asked for flaps 1 degree and 5 degrees. At this time approach sent us to tower, later than usual, about a 6 mi final. The first officer tuned in tower frequency, but failed to switch the lever. We both became preoccupied with the flaps, and I with flying the aircraft and visually following the aircraft in front of me. I landed and realized we were not in contact with tower.

Original NASA ASRS Text

Title: FLC LANDS AT LAS WITHOUT CLRNC.

Narrative: WE HAD A YELLOW LEADING EDGE FLAP TRANSIT LIGHT IN TUCSON THAT WE FINALLY FIXED BY DOING A FLAPS 15 DEG TKOF. AS WE WERE APCHING LAS, WE WERE CONCERNED ABOUT THE LIGHT, AND BEGAN TO DISCUSS IT AS APCH CALLED OUT TFC WE WERE TO FOLLOW. WE VISUALLY ACQUIRED THE ACFT, AND APCH ASKED US TO MAINTAIN VISUAL. AT THIS TIME MY FO ASKED ME IF WE SHOULD LOWER FLAPS TO SEE IF THE LIGHT WOULD STAY YELLOW. A DISCUSSION ENSUED UNTIL I FINALLY ASKED FOR FLAPS 1 DEG AND 5 DEGS. AT THIS TIME APCH SENT US TO TWR, LATER THAN USUAL, ABOUT A 6 MI FINAL. THE FO TUNED IN TWR FREQ, BUT FAILED TO SWITCH THE LEVER. WE BOTH BECAME PREOCCUPIED WITH THE FLAPS, AND I WITH FLYING THE ACFT AND VISUALLY FOLLOWING THE ACFT IN FRONT OF ME. I LANDED AND REALIZED WE WERE NOT IN CONTACT WITH TWR.

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.