Have seen this once with a Turkish Pegasus B737-400 in TXL
Pilot started the engine (I think it was No.1) . Apparently N1 was sluggish on startup, so she pushed the throttles forward DURING ENGINE START! There were lots of flames coming out of the tail pipe, but she cleared off the guy on the headset. The tow truck driver called the tower over his radio and got them to stop the plane, which was already taxying with flames coming out of the engine. The tower told her to stop and that she was on fire, upon she fired both firex bottles (she didn´t have a fire warning due to the fire happening outside the cowling), shut down, with the engine still burning and ordered the evacuation of the plane, which happened ON
THE SIDE OF
THE BURNING ENGINE. The firefighter came (it literaly happened just outside their fire station) and extinguished it. Now this happened at a time when Kurdish PKK militants were torching Turkish owned shops in Berlin to extort money from the owners, so the police cordoned the plane off immideately, suspecting a terrorist attack. As a result the plane was sitting on the taxiway for several hours, until it was decided to tow it into the Lufthansa hangar to let the Lufthansa mechanics have a look at it.
It was found that the N1 shaft was completely seized, explaining the sluggish behaviour on startup. Now with the low pressure compressor not turning, pushing the throttle forward caused a too rich air / fuel mix, resulting in a combustion not completing inside the combustor, but until way behind the engine. The resulting flames damaged the engine pylon and the lower surface of the wing. On idle there were no visible flames yet, but they appeared when she accelerated the engines to taxy away.
The plane was repaired by Lufthansa Technik and later returned to Turkey.
The problem was that the pilot didn´t respond to the N1 indication (normally you´ll see N1 moving at N2
max motoring). If there is no visible N1 rotation you´ve got to shut down and investigate.
The next fault was that she didn´t tell the cabin crew on which side to evacuate, resulting in passengers getting off the plane on the side the fire was happening.
Contributing was the fact that the person walking the plane out was a loader with limited English and not being a mechanic, he probably didn´t know what exactly to look for, e.g. if I would see and engine lighting up without N1 rotation I would tell it to the crew.
[Edited 2005-02-16 11:53:48]
[Edited 2005-02-16 11:55:52]