HPE Proliant DL350 Gen 10 with NBD Onsite

Hello.

I have a drive that has failed on a server at a remote site. The warranty that was purchased is  Wty: HPE HW Maintenance Onsite Support NBD Response. As I read and understood if I had a failed drive HP would send a tech onsite to replace the failed drive. 1.5 years after the server was installed, I have a failing SAS drive. They are telling me this is a customer replacable part. I read the data sheet on the warranty and don't see anything about drives being a soly customer replaceable part, and not sending an onsite tech. Does anyone have any insight on this? If this server was close to me, I would suck it up and replace my self. But this server is a 12 hour drive away, and well a full day of flying, or paying another service to do the drive replacement, which just does not seem right considering the warranty. Or am I wrong?