F100 captain released aircraft parking brakes before being advised to do so by the tug operator on a...

Attributes
ACN	533957
Time
Date	200112
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Fokker 100
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
ASRS Report	533957
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	other anomaly other
Independent Detector	other other : 3
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Pushback incident. The ground crew was pushing us off the gate. During engine start, an electrical problem developed. After pushback, the push crew called for parking brakes set. The captain advised that the parking brake was set, but to stay connected because we were working on a problem and that we may have to return to the gate. We got permission from ramp to return to the gate. Captain advised push crew to return to gate and that he was releasing the brakes. The push crew advised ok. The aircraft rolled forward slightly, making contact with the tow bar. Captain immediately set the brakes, realizing that the tow bar was disconnected. Ground crew inspected aircraft, found no damage. Crew moved the tug and captain taxied aircraft back to the gate. Aircraft was inspected by maintenance -- no damage to aircraft.

Original NASA ASRS Text

Title: F100 CAPT RELEASED ACFT PARKING BRAKES BEFORE BEING ADVISED TO DO SO BY THE TUG OPERATOR ON A RETURN TO THE GATE.

Narrative: PUSHBACK INCIDENT. THE GND CREW WAS PUSHING US OFF THE GATE. DURING ENG START, AN ELECTRICAL PROB DEVELOPED. AFTER PUSHBACK, THE PUSH CREW CALLED FOR PARKING BRAKES SET. THE CAPT ADVISED THAT THE PARKING BRAKE WAS SET, BUT TO STAY CONNECTED BECAUSE WE WERE WORKING ON A PROB AND THAT WE MAY HAVE TO RETURN TO THE GATE. WE GOT PERMISSION FROM RAMP TO RETURN TO THE GATE. CAPT ADVISED PUSH CREW TO RETURN TO GATE AND THAT HE WAS RELEASING THE BRAKES. THE PUSH CREW ADVISED OK. THE ACFT ROLLED FORWARD SLIGHTLY, MAKING CONTACT WITH THE TOW BAR. CAPT IMMEDIATELY SET THE BRAKES, REALIZING THAT THE TOW BAR WAS DISCONNECTED. GND CREW INSPECTED ACFT, FOUND NO DAMAGE. CREW MOVED THE TUG AND CAPT TAXIED ACFT BACK TO THE GATE. ACFT WAS INSPECTED BY MAINT -- NO DAMAGE TO ACFT.

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.

F100 captain released aircraft parking brakes before being advised to do so by the tug operator on a return to the gate.