Air carrier flight crew reported attempting to taxi without receiving the all clear signal from the ...

Narrative:

After push-back from gate; the first officer called ATC for taxi instructions. When taxi instructions were received; I cleared the area visually and saw no ramp crew and no obstructions so I began the power-up for taxi. A ramp crew employee jumped back from under the nose of the aircraft and gave us the stop signal. The power-up was immediately canceled and the brake was re-set. Apparently the wave-off never occurred even though I thought that it had. I signaled for the ramp crew to hook up their headset to ensure that no one was hurt. I was advised by the ramp crew that the tug was not attached to the aircraft and that there was no damage to persons or property. We continued the flight without incident.this was a three day trip. Day two had an [early morning] local van. Day 3 had an [evening] van. When switching a crew from the front side of the clock to the back side of the clock it can make for a difficult day. That being said; somehow the first officer and I both missed not verifying the wave-off from the ramp. From now on before any taxi I will verify the wave-off with the first officer and if there is any doubt I will contact ops for absolute verification.

Original NASA ASRS Text

Title: Air carrier flight crew reported attempting to taxi without receiving the all clear signal from the ground push back crew. The Captain stopped the aircraft and then established communication with the ground crew to ensure that there were no injuries. Crew then safely taxied away from the ramp.

Narrative: After push-back from gate; the first officer called ATC for taxi instructions. When taxi instructions were received; I cleared the area visually and saw no ramp crew and no obstructions so I began the power-up for taxi. A ramp crew employee jumped back from under the nose of the aircraft and gave us the stop signal. The power-up was immediately canceled and the brake was re-set. Apparently the wave-off never occurred even though I thought that it had. I signaled for the ramp crew to hook up their headset to ensure that no one was hurt. I was advised by the ramp crew that the tug was not attached to the aircraft and that there was no damage to persons or property. We continued the flight without incident.This was a three day trip. Day two had an [early morning] local van. Day 3 had an [evening] van. When switching a crew from the front side of the clock to the back side of the clock it can make for a difficult day. That being said; somehow the first officer and I both missed not verifying the wave-off from the ramp. From now on before any taxi I will verify the wave-off with the first officer and if there is any doubt I will contact ops for absolute verification.

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.

Attributes
ACN	1318511
Time
Date	201512
Local Time Of Day	0601-1200
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Other / Unknown

Air carrier flight crew reported attempting to taxi without receiving the all clear signal from the ground push back crew. The captain stopped the aircraft and then established communication with the ground crew to ensure that there were no injuries. Crew then safely taxied away from the ramp.