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Aero Precision provides military aviation aftermarket solutions for c-130


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Shola last won the day on July 3 2018

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  1. Shola

    #2 Engine failed to air-start

    Thanks for the diagram
  2. Shola

    #2 Engine failed to air-start

    Thank you very much.
  3. Shola

    #2 Engine failed to air-start

    Thank you very much. I saw a diagram of the valve housing showing air start switch. Hence, my curiosity.
  4. Shola

    #2 Engine failed to air-start

    I know there is an air start switch in the valve housing. Could this be the cause of the engine failing to air start? Can anyone explain the function of the Air Start switch in the valve housing. Thanks.
  5. Shola

    #2 Engine failed to air-start

    Hello We just completed the ground run. The fuel enrichment system worked ok. Engine rigging ok. Engine performed well during ground running. What else could likely be the problem? Thanks for your time.
  6. Shola

    Oil lose inflight

    Forgive me for the mistake. I actually wanted to refer to the main RGB scavenge pump. The nose scavenge pump is probably to remove oil back to reservoir when the aircraft is nose down. If the fault is with the main or nose RGB scavenge pump, then, it was a good decision sending the engine for general overhaul.
  7. Shola

    Oil lose inflight

    This problem you described could be as a result of bad oil tank cap. Many a times, the gasket for the oil cap may be worn or the cap not properly locked in place. During flight and with pressure differential between inside the oil tank and outside the tank, coupled with the venturi effect of the drain system, oil could be sucked from the reservoir to the drain during flight. Another possible cause might be a failed RGB external scavenge pump. Unfortunately, the overhaul centre might not tell you the real problem.
  8. Shola

    Oil lose inflight

    We had a similar problem on our aircraft. The engine was dumping oil in flight. Using ghe Lockheed Service News pjvr99 spoke about, We ascertained that the problem was due to oil accumulation in the accessory drive housing. As recommended by the Service News, We ran the engine at cruise power for 30 minutes. At the 29th minute, there was oil dumping as highlighted in the Lockheed Service News. We therefore confirmed that the problem was due to inadequate scavenging of oil back to the reservoir. You need to run the engine for minimum 30 minutes for the dumping to begin. We replaced the main engine oil pressure pump as well as the external scavenge pump, both on the accessory drive housing. Please note that you must bleed the main oil pumpbafter installation by loosening the back vent of the pump and then motoring the engine until oil gushes out of the bleed point. This procedure solved the in-flight oil dump in our case. You may wish to try same.
  9. Shola

    VOR inoperative

    The connector to one of the blade antennas on the vertical stabilizer was found removed. Connector tightened back and system checked and found ok. Apparently, there was no signal from one of the 2 antennas to the receiver.
  10. Shola

    #2 Engine failed to air-start

    60% rpm. Suddenly, engine wound down with all other parameters following. Remember that after landing, engine started normally
  11. Please i need help. #2 Engine failed to air-start. Engine wound down from 60 percent rpm. On landing, engine started normally. NTS switch and NTS brackets checked ok. Pump housing oil quantity normal. Need help to rectify the fault. Thanks.
  12. Hello NATOPS. Surprisingly, the throttle creeping has stopped after we swapped the engines. The aircraft has been scheduled to go for functional check flight. I will let you know the outcome of the FCF. Thanks.
  13. Gentlemen, I regret to inform you that after ground run of the engines, the creep came back. This is even after replacing the valve housing cover. Our next plan is to swap engine 1 and 4 to see if the problem will transfer.
  14. Thank you all for your suggestions. Based on your advise, we replaced the gimbal assembly and carried out rigging of the propeller. The throttle lever creeping has stopped. Again, thanks for your time.