wrong runway
I flew with a guy at ******** back in the late 70's. He was on a crew that landed at Biggs AFB instead of El Paso, the month before. It was a pretty funny story. He claimed that there was only one set of runway lights on and they can be controlled from the El Paso tower. They discovered pretty quick what they had done and the controller cleared them to 180 and takeoff the way they came in. The FA's were dinging them and asking "did we land at Biggs?" The Captain denied it and made a PA saying that due to construction they had landed on a part of the airport that was not connected to the terminal, thus neccesitating a take off and landing on another runway. They parked at the gate and the captain told the engineer to erase the voice and data recorders. The agent ask them why they were late and the Captain made something up. They turned around and headed back to DFW.
The only reason they got caught was because of ACARS. They were out/off/on/off/in . They got a few weeks off, Captain more than the fo or fe.
Company said they would have got nothing except for the cover up. The T/O from Biggs was a big mistake because taking off without a dispatch release is a violation of OpSpecs and FAR 121. Captain was lucky to get no certificate action. This was before NASA forms and FAA/Airline issues were often handled over the phone with no paperwork.