V2500
Engine is subject to repeat boroscopes on the HPC due clapper problems (stg3) and suffers from core bleed valve problems from time to time (valves or the solenoids) - am not referring to the pneumatic system PRSOVs. VSVs are subject to periodic lubrication requirements covered by the Maintenance Schedule. Problems tend to manifest as stalls which can lead to surges if unrectified. You'll then most likely be looking at a new motor as the surge tends to make the HPC blades look like sharks teeth - don't know why but especially stage 6. There is test set available for checking out the engine core bleed system
Ref the N1 reversion, the engine is EPR rated, ie the controlling factor is px in-to px out of the engine, with a backup N1 indication. When the EPR sensors either fail or lose their heating supply the indication will either switch to rated or unrated N1 mode as necessary
Think the CFM is the marginal engine of choice with operators but no real complaints with the V2500. Not too bad to work on either
Right, far too technical for a Monday. You ain't seen me right..........
Last edited by North Stand Tier3; 27th April 2009 at 13:39.
Reason: Yet again poor use of the England language