B767 flight crew reported aircraft began rolling after tow bar was disconnected after push back.

Attributes
ACN	1739729
Time
Date	202004
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Parking Brake
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Ground Event / Encounter Loss Of Aircraft Control

Narrative:

After push back was complete; the push back crew stopped our aircraft and asked us to set parking brake. I reached down and pulled the parking brake handle up; while also pressing the brake pedal. I reported over the headset to the ground crew that the parking brake was set. Moments later; the ground crew reported the aircraft was rolling forward. At the same time; I noticed the aircraft was rolling as well. The ground crew called us over the headset to advise us; at which point I stopped the aircraft roll and reset the parking brake. The aircraft rolled about 10 feet. I asked if everyone was okay and if there was any damage. The report back from the ground crew was that everyone was safe and there was no damage. We continued with our flight at the point. Big takeaway here is that we need to always look to verify that the parking brake light is indeed on; thus verifying the parking brake is in fact set. I cannot honestly say if I checked for the light or not.

Original NASA ASRS Text

Title: B767 flight crew reported aircraft began rolling after tow bar was disconnected after push back.

Narrative: After push back was complete; the push back crew stopped our aircraft and asked us to set parking brake. I reached down and pulled the parking brake handle up; while also pressing the brake pedal. I reported over the headset to the ground crew that the parking brake was set. Moments later; the ground crew reported the aircraft was rolling forward. At the same time; I noticed the aircraft was rolling as well. The ground crew called us over the headset to advise us; at which point I stopped the aircraft roll and reset the parking brake. The aircraft rolled about 10 feet. I asked if everyone was okay and if there was any damage. The report back from the ground crew was that everyone was safe and there was no damage. We continued with our flight at the point. Big takeaway here is that we need to always look to verify that the parking brake light is indeed on; thus verifying the parking brake is in fact set. I cannot honestly say if I checked for the light or not.

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.