B737 crew landed without clearance.

Attributes
ACN	425600
Time
Date	199901
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mdw
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Flight Phase	landing other
Route In Use	approach : visual arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 200 flight time total : 12500 flight time type : 1000
ASRS Report	425600
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 1000
ASRS Report	427210
Events
Anomaly	aircraft equipment problem : less severe incursion : landing without clearance non adherence : far non adherence : clearance other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

Prior to the OM, we were cleared by approach control to contact mdw tower at the OM. To my knowledge (captain hand flying) the first officer selected the tower frequency in our #1 radio (standby control head), but apparently the toggle switch didn't make the switch from approach control to tower, when moved, some middle position. Prior to this we were cleared for the ILS to runway 31C (only runway used at the time) in VMC conditions, and the runway was visible 8-10 mi out. We continued and landed in VMC conditions. After landing, we became aware that the #1 radio toggle was not in the full select position of the tower frequency. We re-selected the toggle switch to the tower frequency and reported clear of the runway. Tower acknowledged and sent us to the ground frequency for taxi-in.

Original NASA ASRS Text

Title: B737 CREW LANDED WITHOUT CLRNC.

Narrative: PRIOR TO THE OM, WE WERE CLRED BY APCH CTL TO CONTACT MDW TWR AT THE OM. TO MY KNOWLEDGE (CAPT HAND FLYING) THE FO SELECTED THE TWR FREQ IN OUR #1 RADIO (STANDBY CTL HEAD), BUT APPARENTLY THE TOGGLE SWITCH DIDN'T MAKE THE SWITCH FROM APCH CTL TO TWR, WHEN MOVED, SOME MIDDLE POS. PRIOR TO THIS WE WERE CLRED FOR THE ILS TO RWY 31C (ONLY RWY USED AT THE TIME) IN VMC CONDITIONS, AND THE RWY WAS VISIBLE 8-10 MI OUT. WE CONTINUED AND LANDED IN VMC CONDITIONS. AFTER LNDG, WE BECAME AWARE THAT THE #1 RADIO TOGGLE WAS NOT IN THE FULL SELECT POS OF THE TWR FREQ. WE RE-SELECTED THE TOGGLE SWITCH TO THE TWR FREQ AND RPTED CLR OF THE RWY. TWR ACKNOWLEDGED AND SENT US TO THE GND FREQ FOR TAXI-IN.

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.