B737-300 first officer allowed the aircraft to descend below the GS and left class B airspace.

Attributes
ACN	537135
Time
Date	200202
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl single value : 3000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 13r other
Flight Phase	descent : approach
Route In Use	approach : visual approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 8000 flight time type : 1079
ASRS Report	537135
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	airspace violation : exit non adherence : published procedure non adherence : clearance non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : ils glide slope other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned airspace flight crew : exited penetrated airspace
Consequence	Other
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach runway 13R with first officer flying, ATC had us at 250 KTS. They simultaneously cleared us for the visual approach, asked us to maintain 180 or better and to do the best speed we could do to the marker, and changed us to tower. I read everything back and looked down to change frequencys. When I looked back up, we had dropped below the GS while still doing about 230 KTS. I don't know for sure, but we may have went under the floor of class B airspace. We leveled off, reduced speed, and continued the approach. It would be better not to get 3 things in 1 transmission and not to be asked to hurry approachs.

Original NASA ASRS Text

Title: B737-300 FO ALLOWED THE ACFT TO DSND BELOW THE GS AND LEFT CLASS B AIRSPACE.

Narrative: ON APCH RWY 13R WITH FO FLYING, ATC HAD US AT 250 KTS. THEY SIMULTANEOUSLY CLRED US FOR THE VISUAL APCH, ASKED US TO MAINTAIN 180 OR BETTER AND TO DO THE BEST SPD WE COULD DO TO THE MARKER, AND CHANGED US TO TWR. I READ EVERYTHING BACK AND LOOKED DOWN TO CHANGE FREQS. WHEN I LOOKED BACK UP, WE HAD DROPPED BELOW THE GS WHILE STILL DOING ABOUT 230 KTS. I DON'T KNOW FOR SURE, BUT WE MAY HAVE WENT UNDER THE FLOOR OF CLASS B AIRSPACE. WE LEVELED OFF, REDUCED SPD, AND CONTINUED THE APCH. IT WOULD BE BETTER NOT TO GET 3 THINGS IN 1 XMISSION AND NOT TO BE ASKED TO HURRY APCHS.

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.