B737 flight crew departs without clearance and acquires it after takeoff from ord.

Attributes
ACN	521520
Time
Date	200108
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ord.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Flight Phase	climbout : initial climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 165
ASRS Report	521520
Events
Anomaly	non adherence : published procedure non adherence : clearance non adherence : far
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed without pre-departure clearance. Got it during climb. No deviations.

Original NASA ASRS Text

Title: B737 FLT CREW DEPARTS WITHOUT CLRNC AND ACQUIRES IT AFTER TKOF FROM ORD.

Narrative: DEPARTED WITHOUT PRE-DEP CLRNC. GOT IT DURING CLB. NO DEVS.

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.