Medium large transport flies off assigned heading to avoid WX on departure from ord.

Attributes
ACN	345050
Time
Date	199608
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Environment
Flight Conditions	Mixed
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 160 flight time total : 5000 flight time type : 1200
ASRS Report	345050
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Control called us back to ask us about our present heading. We read back 040 degrees. Controller told us we were supposed to be on 340 degree heading. I told him that there was some WX in that direction and started a left turn in that direction. After that I told the controller that we had read back a 040 degree heading before. He said that he did not care what heading we were, but to keep him informed. I think that because of WX, ATC business and other factors created problem.

Original NASA ASRS Text

Title: MLG FLIES OFF ASSIGNED HDG TO AVOID WX ON DEP FROM ORD.

Narrative: CTL CALLED US BACK TO ASK US ABOUT OUR PRESENT HDG. WE READ BACK 040 DEGS. CTLR TOLD US WE WERE SUPPOSED TO BE ON 340 DEG HDG. I TOLD HIM THAT THERE WAS SOME WX IN THAT DIRECTION AND STARTED A L TURN IN THAT DIRECTION. AFTER THAT I TOLD THE CTLR THAT WE HAD READ BACK A 040 DEG HDG BEFORE. HE SAID THAT HE DID NOT CARE WHAT HDG WE WERE, BUT TO KEEP HIM INFORMED. I THINK THAT BECAUSE OF WX, ATC BUSINESS AND OTHER FACTORS CREATED PROB.

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.