A B767ER PIC releases the parking brake prematurely, prior to the all clear salute but stops the aircraft upon an alert ground person's signal at dfw, tx.

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Attributes
ACN	521833
Time
Date	200108
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
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
ASRS Report	521833
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	ground encounters : person non adherence : company policies other anomaly other anomaly other
Independent Detector	other other : gnd 5
Resolutory Action	flight crew : became reoriented other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Environmental Factor
Primary Problem	Flight Crew Human Performance

Narrative:

Dfw ramp. After a late pushback from the gate, the ground man asked me to park the brakes. I responded and he cleared off the intercom. After the towbar had been disconnected but prior to a salute from ground man, I somehow thought I was cleared to taxi. I cannot explain why, but I released the parking brake and allowed the aircraft to slowly begin to move forward. I somehow had it in my head that we were cleared to go. Fortunately, the aircraft had barely begun to move when an alert ground man signaled me to set the brake and an alert tow tractor driver moved the tractor out of the way. Since the aircraft had already been disconnected, no one was hurt and there was no damage done. After that, the normal departure salute was given and taxi was begun. I cannot explain how I could have done something like this but it shook me up enough that I will be extra careful from now on. I am thankful no one was injured.

Original NASA ASRS Text

Title: A B767ER PIC RELEASES THE PARKING BRAKE PREMATURELY, PRIOR TO THE ALL CLR SALUTE BUT STOPS THE ACFT UPON AN ALERT GND PERSON'S SIGNAL AT DFW, TX.

Narrative: DFW RAMP. AFTER A LATE PUSHBACK FROM THE GATE, THE GND MAN ASKED ME TO PARK THE BRAKES. I RESPONDED AND HE CLRED OFF THE INTERCOM. AFTER THE TOWBAR HAD BEEN DISCONNECTED BUT PRIOR TO A SALUTE FROM GND MAN, I SOMEHOW THOUGHT I WAS CLRED TO TAXI. I CANNOT EXPLAIN WHY, BUT I RELEASED THE PARKING BRAKE AND ALLOWED THE ACFT TO SLOWLY BEGIN TO MOVE FORWARD. I SOMEHOW HAD IT IN MY HEAD THAT WE WERE CLRED TO GO. FORTUNATELY, THE ACFT HAD BARELY BEGUN TO MOVE WHEN AN ALERT GND MAN SIGNALED ME TO SET THE BRAKE AND AN ALERT TOW TRACTOR DRIVER MOVED THE TRACTOR OUT OF THE WAY. SINCE THE ACFT HAD ALREADY BEEN DISCONNECTED, NO ONE WAS HURT AND THERE WAS NO DAMAGE DONE. AFTER THAT, THE NORMAL DEP SALUTE WAS GIVEN AND TAXI WAS BEGUN. I CANNOT EXPLAIN HOW I COULD HAVE DONE SOMETHING LIKE THIS BUT IT SHOOK ME UP ENOUGH THAT I WILL BE EXTRA CAREFUL FROM NOW ON. I AM THANKFUL NO ONE WAS INJURED.

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.