To accept their explanation would be to accept that they went into this maintenance either with the intention of causing a several day long service outage or wi

To accept their explanation would be to accept that they went into this maintenance either with the intention of causing a several day long service outage or without knowledge that they would cause a service outage (i.e. something happened that they didn't anticipate.) If it was intentional, Bob help anyone who trusts them with their business. If it was accidental/unanticipated, they need to own up to what went wrong and show how they're going to prevent it in the future.