Airport comms went down
When I was in the middle east many years ago (over 30) I was working on the Air Traffic system. This being a rather large place meant that field trips were fairly common (but try not to drive at night as you might crash into a camel sleeping on the road).
One fine morning. the boss called me in and said that all local radio communications had failed at an airport - the catch was it was 600 miles to the north. I got the company pickup (a GMC Jimmy as I recall) and drove to this place in the middle of nowhere and as it was getting dark booked into a high class (well, high price) hotel.
High class in this instance meant there were less than 2 cockroaches per square foot.
The next morning, thankfully leaving said hotel, I went to the airport and after showing an endless set of security passes, went to the hut where the radios were physically located and spotted the problem quite quickly; a groundskeeper had turned off the main power switch to the hut, so no wonder they weren't working.
The middle east is a place where one must be very careful about the locals with loss of face, so I went in and waited about 30 minutes before turning the main power on again. I did a quick check of the radio performance as I was in the place and had little desire to go there again any time soon.
I wrote up the fault and response as 'primary power adjusted' and then drove back to a well deserved (and illegal) couple of beers.