If the meter pan isn't "locked" and just tagged, I will cut the tag, and remove the meter, if need be, to check the connections. If all is in tact and a problem still exists I will have the customer call the POCO and advise them of the problem. IMHO, the meter pan is attached to the house (or building) and ONE OF US, in all likelihood, installed it. We also attach to the service drop but the POCO's in my area come out afterwards and make their own splices or crimps. I will not take the ladder off my truck to check those connections unless I made them or unless the break is obvious at the service connection.
Just had a situation like this last week. Customer said they lost power to "half "of their house. I'm usually suspicious of this type of call because people generally panic when a few receptacles are out. But, sure enough, after removing the meter, I found they lost one phase. Unfortunately for them it was an underground service and the POCO had to dig up their lawn to get a new wire installed. It wasn't installed in PVC, it was direct buried cable.