Flight crew of a british jetstream 32, BA32, accidentally took off with their transponder on the wrong code resulting in departure controller advising them that there was no target showing for their aircraft.

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Attributes
ACN	429790
Time
Date	199902
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl.airport
State Reference	MO
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : t75.tracon
Operator	common carrier : air carrier
Make Model Name	Jetstream 32
Operating Under FAR Part	Part 119
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 3300 flight time type : 1000
ASRS Report	429790
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	non adherence : clearance non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	controller : issued alert flight crew : overcame equipment problem
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On takeoff out of stl we were handed over from the tower to the departure controller. The controller did not see us on radar, asked us to check transponder on. We did and at that time realized that we had it switched on but we were squawking 1200. (This occurred when the transponder was switched on. The preselect button is easily touched when switching the transponder on. We keep 1200 in the preselect and it was touched when we switched on the transponder before takeoff.) we then squawked the correct squawk and continued the flight without any further incident.

Original NASA ASRS Text

Title: FLC OF A BRITISH JETSTREAM 32, BA32, ACCIDENTALLY TOOK OFF WITH THEIR XPONDER ON THE WRONG CODE RESULTING IN DEP CTLR ADVISING THEM THAT THERE WAS NO TARGET SHOWING FOR THEIR ACFT.

Narrative: ON TKOF OUT OF STL WE WERE HANDED OVER FROM THE TWR TO THE DEP CTLR. THE CTLR DID NOT SEE US ON RADAR, ASKED US TO CHK XPONDER ON. WE DID AND AT THAT TIME REALIZED THAT WE HAD IT SWITCHED ON BUT WE WERE SQUAWKING 1200. (THIS OCCURRED WHEN THE XPONDER WAS SWITCHED ON. THE PRESELECT BUTTON IS EASILY TOUCHED WHEN SWITCHING THE XPONDER ON. WE KEEP 1200 IN THE PRESELECT AND IT WAS TOUCHED WHEN WE SWITCHED ON THE XPONDER BEFORE TKOF.) WE THEN SQUAWKED THE CORRECT SQUAWK AND CONTINUED THE FLT WITHOUT ANY FURTHER INCIDENT.

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.