Narrative:

We rolled out to the end of runway xxc and exited. We arrived at night in moderate rain conditions. Taxi instructions [were] from ground. ZZZ ramp is uncontrolled and no further contact with ATC is necessary to access our gate. As we made the left turn around the concourse that put us on the straightaway between [two gates]; I noticed a provisioning truck out of my periphery to the right. I did not perceive the truck as a threat as it appeared we had more than adequate clearance as the truck was on an access road. Additionally; the first officer did not alert me to a proximity concern so I continued my taxi course and speed. We felt no impact or sound passing the provisioning truck. It was only after we were parked at the gate did I subsequently learn about our winglet grazing the back end of the provisioning truck. I also learned that the provisioning truck had departed the access road paved surface and was stuck in the grass. This was not evident to us as we approached the vehicle.as the PIC; I take full responsibility for the event that occurred. Night; rain; and the close proximity of the inbound taxi lane at ZZZ to the vehicle access road all were contributing factors along with the fact we had no warning of a disabled vehicle that could potentially cause an impedance to our taxi in. That being said; had I simply altered my taxi course; in which I had space to do so; queried the first officer more proactively; or stopped the aircraft to positively ensure clearance; this as soon as possible would not have been written. In addition to the above mentioned crew actions; it is incumbent on both pilots to speak up; as forcefully as necessary to prevent this type of event from occurring. Both of us are to assess the risks to the aircraft at all times. We can never just be along for the ride; become complacent; or assume the other guy always knows what he is doing. We have two pilots because it is required; and it also requires both pilots to be present and engaged.

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Original NASA ASRS Text

Title: Air carrier flight crew reported after parking; ground crew notified the crew the aircraft winglet made contact with a truck on the access road.

Narrative: We rolled out to the end of Runway XXC and exited. We arrived at night in moderate rain conditions. Taxi instructions [were] from Ground. ZZZ ramp is uncontrolled and no further contact with ATC is necessary to access our gate. As we made the left turn around the concourse that put us on the straightaway between [two gates]; I noticed a provisioning truck out of my periphery to the right. I did not perceive the truck as a threat as it appeared we had more than adequate clearance as the truck was on an access road. Additionally; the First Officer did not alert me to a proximity concern so I continued my taxi course and speed. We felt no impact or sound passing the provisioning truck. It was only after we were parked at the gate did I subsequently learn about our winglet grazing the back end of the provisioning truck. I also learned that the provisioning truck had departed the access road paved surface and was stuck in the grass. This was not evident to us as we approached the vehicle.As the PIC; I take full responsibility for the event that occurred. Night; rain; and the close proximity of the inbound taxi lane at ZZZ to the vehicle access road all were contributing factors along with the fact we had no warning of a disabled vehicle that could potentially cause an impedance to our taxi in. That being said; had I simply altered my taxi course; in which I had space to do so; queried the First Officer more proactively; or stopped the aircraft to positively ensure clearance; this ASAP would not have been written. In addition to the above mentioned crew actions; it is incumbent on both pilots to speak up; as forcefully as necessary to prevent this type of event from occurring. Both of us are to assess the risks to the aircraft at all times. We can never just be along for the ride; become complacent; or assume the other guy always knows what he is doing. We have two pilots because it is required; and it also requires both pilots to be present and engaged.

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.