mirabeau
3rd Mar 2009, 23:04
Got an engine surge problem on a B727 200 RE centre engine JT8D -17.
The engine went for a workshop visit to check the High press compressor discs for an AD. some discs were replaced.
During the first flight the engine surged at FL 350 during climb. Able to operate without surge by applying bleeds to that engine.
Workshop then replaced the nozzle guide vanes, but engine surged again at high alt when throttling back.
Another workshop visit and the low press C1 blades were replaced. Air test failed again with surge at FL 380 throttling back to cruise power.
All sense lines, bleed lines and intake duct checked already.
ANYONE OUT THERE WITH ANY IDEAS ?
The engine went for a workshop visit to check the High press compressor discs for an AD. some discs were replaced.
During the first flight the engine surged at FL 350 during climb. Able to operate without surge by applying bleeds to that engine.
Workshop then replaced the nozzle guide vanes, but engine surged again at high alt when throttling back.
Another workshop visit and the low press C1 blades were replaced. Air test failed again with surge at FL 380 throttling back to cruise power.
All sense lines, bleed lines and intake duct checked already.
ANYONE OUT THERE WITH ANY IDEAS ?