Compressor stall. That reminds me on an incident at the Anchorage Airport, back in the 80's. I worked on the Trans-Alaska Pipeline from 77 to 98, working week On week Off. Because I lived in Kenai AK, I flew in on a local Airline on the morning of Crew change to catch charter to the Station I was going to. While sitting in the Restaurant looking out on the flight line, there was an Alaska Airlines 727 at a near by gate. There was some kind of mechanical issue with ground crew in the cockpit, and and discussing issues on the tarmac. A lift box truck back up to the left rear passenger door, raised the bed up, and put a cover on the Left Engine intake. about 3 or 4 minutes later, you could hear an engine starting to spin up. I didn't think to much about it, then a real short time later, we heard 3 quick booms. The big windows in the restaurant shook real bad at each boom. then you heard the engine start to spin down.
The crew on the plane came boiling out of the plane looking around, gesturing to each other and all of them talking. about 2 minutes later, an Alaska Airlines pickup pulls up, and stops, a man gets out and HE started gesturing and talking, all the original ground crew stood there with their mouths shut and heads hanging down. Not sure what happened after that, had to go catch my charter flight.
