Badiul Alam Posted May 25, 2020 Share Posted May 25, 2020 Hey Hercules world. I have a problem with one of my eng which is only 1021:44 TSO. On 22 May 20, Idle grd run was carr out at Normal GI power as the AC is on grd since 16 Mar 20 due to expiry of ac TBO. Grd Run being carr out all 04 Eng after 15 days cycl. This eng is at No 4 Posn. During Grd Run everything was found normal incl all parametets, oil qty was 10.5 USG, oil temp, oil press everything was just fine. But on 23 May, it was found that, oil dropping from drain mast. We thought it normal. But today, 25 May, when we ckd the tank, oil was found only 3.5 USG. We ckd throughly and found that, oil dropping from the 5th satge bottom bleed valve, from the rear burner drain valve, from turbine rear bearing( front of 4th stage rotor bottom and also accumulated oil flooding in front of turbine 4th stage rotor. Scav oil filter assy ckd for CB pop out, but found ok. It may be mentioned that, after OH, this eng has been ops with light white smoke coming at Idle power through drain madt( breather Vent). But at High power setting, smoke not visible and oil cobsumption well below spec limit. What I can do now? Pl advise. Quote Link to comment Share on other sites More sharing options...
faiz Posted June 7, 2020 Share Posted June 7, 2020 this problem came many time . first ck magplug for g box and p section if its ok change oil pump with filter . if its not fix . thats mean bearing is leaking i mean internal leak thats mean u have to drop engine Quote Link to comment Share on other sites More sharing options...
pjvr99 Posted June 8, 2020 Share Posted June 8, 2020 Static leak. 1st thing to do is remove RGB fwd mag plug and ADH bottom mag plug. Leave them open for 2hrs or so, then see which one is still dripping. If ADH, start by replacing P/S filter. After that replace main oil pump. Lockheed Service News V18 N3 gives an excellent description of the problem and trouble shooting Quote Link to comment Share on other sites More sharing options...
Badiul Alam Posted June 19, 2020 Author Share Posted June 19, 2020 On 6/8/2020 at 8:22 AM, pjvr99 said: Static leak. 1st thing to do is remove RGB fwd mag plug and ADH bottom mag plug. Leave them open for 2hrs or so, then see which one is still dripping. If ADH, start by replacing P/S filter. After that replace main oil pump. Lockheed Service News V18 N3 gives an excellent description of the problem and trouble shooting Thanks.can u pl send me the copy of V18N3 sir. Quote Link to comment Share on other sites More sharing options...
Lkuest Posted June 20, 2020 Share Posted June 20, 2020 17 hours ago, Badiul Alam said: Thanks.can u pl send me the copy of V18N3 sir. Here's the source website for service news bulletins. https://www.lockheedmartin.com/en-us/who-we-are/business-areas/aeronautics/sustainment/customer-support-center/service-news-magazine-archive.html Quote Link to comment Share on other sites More sharing options...
Badiul Alam Posted June 20, 2020 Author Share Posted June 20, 2020 2 hours ago, Lkuest said: Here's the source website for service news bulletins. https://www.lockheedmartin.com/en-us/who-we-are/business-areas/aeronautics/sustainment/customer-support-center/service-news-magazine-archive.html Thanks a lot Quote Link to comment Share on other sites More sharing options...
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