munirabbasi Posted October 30, 2018 Share Posted October 30, 2018 Hello Honeywell Expertises:- We are facing problem of APU compressor first stage blades damaged ,any expertise can tell me expert opinion what are reasons behind it.( APU are door less) Munir Abbasi Home of hercules Pakistan Quote Link to comment Share on other sites More sharing options...
Ahmer Posted October 30, 2018 Share Posted October 30, 2018 30 minutes ago, munirabbasi said: Hello Honeywell Expertises:- We are facing problem of APU compressor first stage blades damaged ,any expertise can tell me expert opinion what are reasons behind it.( APU are door less) Munir Abbasi Home of hercules Pakistan Hello sir, Le49705 ,GTCP 85-180le .plz check Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 30, 2018 Author Share Posted October 30, 2018 1 minute ago, Ahmer said: Hello sir, Le49705 ,GTCP 85-180le .plz check Booklet of kellstrom Defense Aerospace Ink manual Write LE49710 Regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 30, 2018 Author Share Posted October 30, 2018 27 minutes ago, munirabbasi said: Booklet of kellstrom Defense Aerospace Ink manual Write LE49710 Regards Munir Abbasi Amend to read my post LE49705 instead of LE49710 Regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
pjvr99 Posted October 30, 2018 Share Posted October 30, 2018 Probably want to keep APU shut down when taxing on dirt or unprepared strips. Having said that, the intake screen holes are big enough to let in small gravel and stones which can and will damage the compressor when it is started again .... Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 31, 2018 Author Share Posted October 31, 2018 7 hours ago, pjvr99 said: Probably want to keep APU shut down when taxing on dirt or unprepared strips. Having said that, the intake screen holes are big enough to let in small gravel and stones which can and will damage the compressor when it is started again .... Thanks Peter The blades of first stage has sulphidation problem at particular angle. Munir Abbasi Home of hercules Pakistan Quote Link to comment Share on other sites More sharing options...
Ahmer Posted October 31, 2018 Share Posted October 31, 2018 To avaoid such type FOD to improve APU panel modification of intake.Direction of intake is toword ground if u little change to upward to minimize the chance of FOD.(for without door APU) Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 31, 2018 Author Share Posted October 31, 2018 6 hours ago, Ahmer said: To avaoid such type FOD to improve APU panel modification of intake.Direction of intake is toward ground if u little change to upward to minimize the chance of FOD.(for without door APU) Thanks Ahmer Lockheed martin service news pointed out damage of APU compressor due debris, do not operate APU on ground until N# 2 engine is switched off, to FOE and enhance the life of APU Regards Munir Abbasi Home of Hercules Pakistan Quote Link to comment Share on other sites More sharing options...
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