Premature pushback in non adherence to ATC clearance instruction.

Attributes
ACN	292530
Time
Date	199412
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iad
State Reference	VA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mia
Operator	common carrier : air carrier
Make Model Name	F28 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 4000
ASRS Report	292530
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Special procedures are used for pushing back at iad's gates. Note: (we were monitoring ground all during pushback). While coordinating with pushback crew and flight attendant I received clearance from ground pertaining to pushback clearance. I believe I (first officer) made a mistake after the fact. I thought we were cleared for pushback but according to ground was instructed to hold the push. We pushed back. Ground told us about our (my) error but it was 'no problem.' in the future I will be more careful to communication and follow instruction on pushback. If I was instructed (not sure) to hold the push then the distrs (special procedures) may have been my problem.

Original NASA ASRS Text

Title: PREMATURE PUSHBACK IN NON ADHERENCE TO ATC CLRNC INSTRUCTION.

Narrative: SPECIAL PROCS ARE USED FOR PUSHING BACK AT IAD'S GATES. NOTE: (WE WERE MONITORING GND ALL DURING PUSHBACK). WHILE COORDINATING WITH PUSHBACK CREW AND FLT ATTENDANT I RECEIVED CLRNC FROM GND PERTAINING TO PUSHBACK CLRNC. I BELIEVE I (FO) MADE A MISTAKE AFTER THE FACT. I THOUGHT WE WERE CLRED FOR PUSHBACK BUT ACCORDING TO GND WAS INSTRUCTED TO HOLD THE PUSH. WE PUSHED BACK. GND TOLD US ABOUT OUR (MY) ERROR BUT IT WAS 'NO PROB.' IN THE FUTURE I WILL BE MORE CAREFUL TO COM AND FOLLOW INSTRUCTION ON PUSHBACK. IF I WAS INSTRUCTED (NOT SURE) TO HOLD THE PUSH THEN THE DISTRS (SPECIAL PROCS) MAY HAVE BEEN MY 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.