A300 first officer reported pushing back early due to miscommunication between the flight crew.

Attributes
ACN	1507638
Time
Date	201712
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Route In Use	Other Controlled
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

Aircraft blocked out 1 minute early. We had received a revised release time during preflight checks. I had calculated the 15 minutes. At [one minute before the release time] I called for pushback clearance with ops; at the same time the captain misunderstood what I was doing and told the ground crew we were ready to push back.

Original NASA ASRS Text

Title: A300 First Officer reported pushing back early due to miscommunication between the flight crew.

Narrative: Aircraft blocked out 1 minute early. We had received a revised release time during preflight checks. I had calculated the 15 minutes. At [one minute before the release time] I called for pushback clearance with Ops; at the same time the Captain misunderstood what I was doing and told the ground crew we were ready to push back.

Data retrieved from NASA's ASRS site 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.