An medium large transport commercial fixed wing aircraft, after pushback and engine start, the tow bar was disconnected and towed 90 degrees to the nose tire incurring damage to the tow bar.

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Attributes
ACN	403998
Time
Date	199805
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mke
State Reference	WI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 5700 flight time type : 600
ASRS Report	403998
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10500 flight time type : 7500
ASRS Report	403867
Events
Anomaly	non adherence : published procedure other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

After normal pushback from jetway, we started both engines, set the parking brake and notified ground crew to disconnect. They disconnected tow bar and turned it 90 degrees to aircraft centerline (not normal procedure) and hooked it to a tug and proceeded to drive away. One of the tow bar wheels broke as it was wedged under aircraft front wheels.

Original NASA ASRS Text

Title: AN MLG COMMERCIAL FIXED WING ACFT, AFTER PUSHBACK AND ENG START, THE TOW BAR WAS DISCONNECTED AND TOWED 90 DEGS TO THE NOSE TIRE INCURRING DAMAGE TO THE TOW BAR.

Narrative: AFTER NORMAL PUSHBACK FROM JETWAY, WE STARTED BOTH ENGS, SET THE PARKING BRAKE AND NOTIFIED GND CREW TO DISCONNECT. THEY DISCONNECTED TOW BAR AND TURNED IT 90 DEGS TO ACFT CTRLINE (NOT NORMAL PROC) AND HOOKED IT TO A TUG AND PROCEEDED TO DRIVE AWAY. ONE OF THE TOW BAR WHEELS BROKE AS IT WAS WEDGED UNDER ACFT FRONT WHEELS.

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.