Farhanz Posted March 28, 2021 Share Posted March 28, 2021 Hye guys. I really need help. I had an experienced on this issue. Mine generator disc indicator on the overhead panel not illuminate during test. Before test, my aircraft do experience generator out light and failed bearing light illuminate in flight. Pilot tried to disconnect the generator with the gearbox using generator disconnect system, however the indivator didnt illuminate and it forced pilot to shutdown #3 engine to avoid catastrophic mechanical failure. On the rectification after the flight, it found that the generator had broken with shaft do also broken. From my understanding, failed bearing light is due to mechanicle failure or maybe due to the broken of the generator. However, im still confuse that my gen disc indicator not illuminate during test after replacing generator, VR and GCP. When further rectification on gen disc assy, i did found spring loaded hardened pluger of gen disc assy was broken. Once replacing the plunger, gen disc test light illuminate. Can someone please explain to me? Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted March 29, 2021 Share Posted March 29, 2021 19 hours ago, Farhanz said: Hye guys. I really need help. I had an experienced on this issue. Mine generator disc indicator on the overhead panel not illuminate during test. Before test, my aircraft do experience generator out light and failed bearing light illuminate in flight. Pilot tried to disconnect the generator with the gearbox using generator disconnect system, however the indivator didnt illuminate and it forced pilot to shutdown #3 engine to avoid catastrophic mechanical failure. On the rectification after the flight, it found that the generator had broken with shaft do also broken. From my understanding, failed bearing light is due to mechanicle failure or maybe due to the broken of the generator. However, im still confuse that my gen disc indicator not illuminate during test after replacing generator, VR and GCP. When further rectification on gen disc assy, i did found spring loaded hardened pluger of gen disc assy was broken. Once replacing the plunger, gen disc test light illuminate. Can someone please explain to me? Dear sir you have done rectification/ FI totally wrong. test system of DISC system of light is used to check out all disc circuity of plunger When GEN is Disconnected from RGB it has been fired.The OUT light of GEN illuminated due to its rpm drop. But DISC light was failed to illuminate reason Plunger disc micro SW was obstructed due to malfunction of SW or plunger mushroom Munir Abbasi Quote Link to comment Share on other sites More sharing options...
Farhanz Posted March 29, 2021 Author Share Posted March 29, 2021 Advise, sir. Did u know how or what are the things that cam cause the plunger mushroom to break as its natural working operation shouldnt be like that sir. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted March 29, 2021 Share Posted March 29, 2021 6 hours ago, Farhanz said: Advise, sir. Did u know how or what are the things that cam cause the plunger mushroom to break as its natural working operation shouldnt be like that sir. Please let me know actual defect during flight . This was not alarm of system during flight which has been mentioned by you sir on forum. It seem to malpractice of flight engineer CAUTION Holding GEN DISC TEST switch for an excessive amount of time will fire disconnect(24-20-06) mechanism. Best regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
Farhanz Posted March 30, 2021 Author Share Posted March 30, 2021 will the T plunger will broken once initiated sir? i meant, the hardened steel plunger was found released. however, i did not know where is the exact location of the fusible plug mentioned in my manual. how is it melt and how is it released the plunger by melting the fusible plug?? Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted March 30, 2021 Share Posted March 30, 2021 4 hours ago, Farhanz said: will the T plunger will broken once initiated sir? i meant, the hardened steel plunger was found released. however, i did not know where is the exact location of the fusible plug mentioned in my manual. how is it melt and how is it released the plunger by melting the fusible plug?? Please Contact me my E.mail address muhammadmunir332@gmail.com Best regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted March 31, 2021 Share Posted March 31, 2021 18 hours ago, Farhanz said: will the T plunger will broken once initiated sir? i meant, the hardened steel plunger was found released. however, i did not know where is the exact location of the fusible plug mentioned in my manual. how is it melt and how is it released the plunger by melting the fusible plug?? The "fusible" plug (link) is the part that holds the spring compressed and the hardened plunger retracted. The test circuit is a lower amperage (7.5A if I remember correctly) and the disconnect power is 20 or 25A. IF you hold the test "too long" you an heat up the fusible link and release the disconnect plunger gendiscon.bmp Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted April 1, 2021 Share Posted April 1, 2021 21 hours ago, NATOPS1 said: The "fusible" plug (link) is the part that holds the spring compressed and the hardened plunger retracted. The test circuit is a lower amperage (7.5A if I remember correctly) and the disconnect power is 20 or 25A. IF you hold the test "too long" you an heat up the fusible link and release the disconnect plunger gendiscon.bmp Excellent JPG Picture of GEN DISC SYSTEM SCHEMATIC Besr Regards Munir Abbasu 1 Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted April 2, 2021 Share Posted April 2, 2021 23 hours ago, munirabbasi said: Excellent JPG Picture of GEN DISC SYSTEM SCHEMATIC Besr Regards Munir Abbasu You may need to have FLASH available for these animations to work (I think) GenDisc.exe GenDisc TEST.exe Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted April 2, 2021 Share Posted April 2, 2021 14 hours ago, NATOPS1 said: You may need to have FLASH available for these animations to work (I think) GenDisc.exe 286.13 kB · 4 downloads GenDisc TEST.exe 286.61 kB · 2 downloads Sir Lot of thanks Munir Abbasi Home of Hercules Pakistan Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.