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Badiul Alam

C-130 B prop rpm problem

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8Hey! Hercules world. I am facing problem with one of my prop of C-130B eng. While opening power lever, rpm goes upto 103% with Freq 410 Hz in Prop gov cont sw in Normal. Afterward rpm slowly back to 102% with Freq 402Hz. In Mach Gov RPM remain ok. We change the indicator guessing that if Frq is 402%, rpm should be 100.2%. No otgers flux. Any suggestion pl. 

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not sure why mech is ok, but it sounds like internal leak, maybe dome seals, pitchlock regulator

seals, prop retaining nut seals.

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On 5/22/2020 at 8:49 AM, pjvr99 said:

not sure why mech is ok, but it sounds like internal leak, maybe dome seals, pitchlock regulator

seals, prop retaining nut seals.

As a 1st step we have changed the gauge. Let see what happened next. Thanks a lot.

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On 5/22/2020 at 8:49 AM, pjvr99 said:

not sure why mech is ok, but it sounds like internal leak, maybe dome seals, pitchlock regulator

seals, prop retaining nut seals.

Thanks a lot

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