The ground crew pushed a B767 onto an active taxiway without a clearance at ont.

Attributes
ACN	452160
Time
Date	199910
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ont.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : pushback
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 6000 flight time type : 1500
ASRS Report	452160
Events
Anomaly	incursion : taxiway non adherence : published procedure non adherence : far
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

While maintenance was pushing back our B767 at the ramp in ont, we were pushed onto taxiway west, which dead ends into our ramp. Usually we are pushed to a different ramp. Letting maintenance do their job, we did not notice we were going to cause a conflict. We ended up blocking a small plane from entering our ramp. We had been in and out of ont several times before and never asked for pushback clearance because we usually stay on our ramp. This caught us by surprise and ended causing 1 aircraft to back taxi and aggravating ground control.

Original NASA ASRS Text

Title: THE GND CREW PUSHED A B767 ONTO AN ACTIVE TXWY WITHOUT A CLRNC AT ONT.

Narrative: WHILE MAINT WAS PUSHING BACK OUR B767 AT THE RAMP IN ONT, WE WERE PUSHED ONTO TXWY W, WHICH DEAD ENDS INTO OUR RAMP. USUALLY WE ARE PUSHED TO A DIFFERENT RAMP. LETTING MAINT DO THEIR JOB, WE DID NOT NOTICE WE WERE GOING TO CAUSE A CONFLICT. WE ENDED UP BLOCKING A SMALL PLANE FROM ENTERING OUR RAMP. WE HAD BEEN IN AND OUT OF ONT SEVERAL TIMES BEFORE AND NEVER ASKED FOR PUSHBACK CLRNC BECAUSE WE USUALLY STAY ON OUR RAMP. THIS CAUGHT US BY SURPRISE AND ENDED CAUSING 1 ACFT TO BACK TAXI AND AGGRAVATING GND CTL.

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.