A B737 flight crew landing without clearance at dfw.

Attributes
ACN	622207
Time
Date	200301
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 3000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer only : 18r other
Flight Phase	descent : vacating altitude ground : holding ground : taxi landing : roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Experience	flight time last 90 days : 3000 flight time total : 15000 flight time type : 200
ASRS Report	622207
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	incursion : landing without clearance non adherence : far
Independent Detector	other controllera other flight crewa other flight crewb
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Dfw approach changed the approach and landing runway 6 times from the initial contact with regional approach until the final controller. We were initially assigned runway 17R, then runway 18C, then runway 17R, then runway 18R local approach, then runway 18R ILS, and finally runway 18R local. We went with the flow and never did the captain or I discuss the situation because we were too busy with the task at hand. We just changed the radio frequencys, reprogrammed the computers, and briefed it the final approach controller cleared us for the local runway 18R, and it was uneventful landing. We exited the runway and we were holding short of runway 18L when the captain asked me if we were monitoring the correct frequency. At that time I realized we had landing without clearance. I dialed in the correct tower frequency and told him we were holding short of runway 18L. He responded that he had been trying to call us, then cleared us across runway 18L and told us to contact ground. I don't recall the final approach controller telling us to contact the tower.

Original NASA ASRS Text

Title: A B737 FLT CREW LWOC AT DFW.

Narrative: DFW APCH CHANGED THE APCH AND LNDG RWY 6 TIMES FROM THE INITIAL CONTACT WITH REGIONAL APCH UNTIL THE FINAL CTLR. WE WERE INITIALLY ASSIGNED RWY 17R, THEN RWY 18C, THEN RWY 17R, THEN RWY 18R LCL APCH, THEN RWY 18R ILS, AND FINALLY RWY 18R LCL. WE WENT WITH THE FLOW AND NEVER DID THE CAPT OR I DISCUSS THE SIT BECAUSE WE WERE TOO BUSY WITH THE TASK AT HAND. WE JUST CHANGED THE RADIO FREQS, REPROGRAMMED THE COMPUTERS, AND BRIEFED IT THE FINAL APCH CTLR CLRED US FOR THE LCL RWY 18R, AND IT WAS UNEVENTFUL LNDG. WE EXITED THE RWY AND WE WERE HOLDING SHORT OF RWY 18L WHEN THE CAPT ASKED ME IF WE WERE MONITORING THE CORRECT FREQ. AT THAT TIME I REALIZED WE HAD LWOC. I DIALED IN THE CORRECT TWR FREQ AND TOLD HIM WE WERE HOLDING SHORT OF RWY 18L. HE RESPONDED THAT HE HAD BEEN TRYING TO CALL US, THEN CLRED US ACROSS RWY 18L AND TOLD US TO CONTACT GND. I DON'T RECALL THE FINAL APCH CTLR TELLING US TO CONTACT THE 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.