A B737-200 flight crew overshoots their assigned altitude during climb out when the PIC fails to engage the altitude hold on the autoplt 10 mi west of dfw, tx.

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Attributes
ACN	488570
Time
Date	200010
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dal.airport
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 10300
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 135 flight time total : 16900 flight time type : 16400
ASRS Report	488570
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 160 flight time total : 7000 flight time type : 3200
ASRS Report	489007
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation non adherence : clearance other anomaly other
Independent Detector	atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude
Miss Distance	horizontal : 18000 vertical : 700
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Leveling at 10000 ft during climb out on vectors to the worth three departure. Departure controller called out 12 O'clock position traffic at 11000 ft. We both started looking for the traffic and I failed to engage altitude hold at 10000 ft. The TCASII (TA) alerted. I realized we were still climbing and both the controller and the sic called out the deviation all at the same time. I hurried back to 10000 ft. The deviation was 300 ft or less. We had the traffic in sight by the time and there was no 'close encounter.'

Original NASA ASRS Text

Title: A B737-200 FLC OVERSHOOTS THEIR ASSIGNED ALT DURING CLBOUT WHEN THE PIC FAILS TO ENGAGE THE ALT HOLD ON THE AUTOPLT 10 MI W OF DFW, TX.

Narrative: LEVELING AT 10000 FT DURING CLBOUT ON VECTORS TO THE WORTH THREE DEP. DEP CTLR CALLED OUT 12 O'CLOCK POS TFC AT 11000 FT. WE BOTH STARTED LOOKING FOR THE TFC AND I FAILED TO ENGAGE ALT HOLD AT 10000 FT. THE TCASII (TA) ALERTED. I REALIZED WE WERE STILL CLBING AND BOTH THE CTLR AND THE SIC CALLED OUT THE DEV ALL AT THE SAME TIME. I HURRIED BACK TO 10000 FT. THE DEV WAS 300 FT OR LESS. WE HAD THE TFC IN SIGHT BY THE TIME AND THERE WAS NO 'CLOSE ENCOUNTER.'

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.