Great Above Posted December 13, 2016 Share Posted December 13, 2016 1. Pls why do we perform NTS checks on the C130? 2. Why do we place the NTS/Valve switch to NTS before engine shutdown Quote Link to comment Share on other sites More sharing options...
Ahmer Posted October 24, 2018 Share Posted October 24, 2018 We mechnically chech sevicabilty of NTS switch. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 24, 2018 Share Posted October 24, 2018 On 12/13/2016 at 10:57 AM, Great Above said: 1. Pls why do we perform NTS checks on the C130? 2. Why do we place the NTS/Valve switch to NTS before engine shutdown To check the serviceability of NTS system in every post flight shutdown. Three position SW is selected to NTS position before shutdown of engine because the system must be checked either it is serviceable for next flight or not. Munir Abbasi Home of hercules Pakistan Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted October 25, 2018 Share Posted October 25, 2018 On 12/12/2016 at 11:57 PM, Great Above said: 1. Pls why do we perform NTS checks on the C130? 2. Why do we place the NTS/Valve switch to NTS before engine shutdown 1) The in flight check is to make sure the NTS system is adjusted correctly to prevent excessive drag and also to ensure the propeller speed or acceleration will be controlled during airstart. In flight the switch is in VALVE to "show" actual feather valve movement which causes the increase in blade angle. 2) The on the ground shutdown selection of NTS allows us to "see" the movement of the "NTS Linkage" that would normally actuate the feather valve. The linkage is camed out so it cannot actuate the feather valve but we want to make sure the system linkage is moving for the next flight. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 25, 2018 Share Posted October 25, 2018 (edited) 12 hours ago, NATOPS1 said: 1) The in flight check is to make sure the NTS system is adjusted correctly to prevent excessive drag and also to ensure the propeller speed or acceleration will be controlled during airstart. In flight the switch is in VALVE to "show" actual feather valve movement which causes the increase in blade angle. 2) The on the ground shutdown selection of NTS allows us to "see" the movement of the "NTS Linkage" that would normally actuate the feather valve. The linkage is camed out so it cannot actuate the feather valve but we want to make sure the system linkage is moving for the next flight. FRT Thanks for excellent explanation of NTS System. Munir Abbasi Home of hercules Pakistan Edited October 25, 2018 by munirabbasi Quote Link to comment Share on other sites More sharing options...
Ahmer Posted October 25, 2018 Share Posted October 25, 2018 13 hours ago, NATOPS1 said: 1) The in flight check is to make sure the NTS system is adjusted correctly to prevent excessive drag and also to ensure the propeller speed or acceleration will be controlled during airstart. In flight the switch is in VALVE to "show" actual feather valve movement which causes the increase in blade angle. 2) The on the ground shutdown selection of NTS allows us to "see" the movement of the "NTS Linkage" that would normally actuate the feather valve. The linkage is camed out so it cannot actuate the feather valve but we want to make sure the system linkage is moving for the next flight. 1.NTS system is checked before engine shut down in air, when its ok then shut down the engine during aircrft FCF. if NTS system not functioning u could not shut down the engine for further air start. 2. The system fuction not only use during air start only, it's work during when prop try to rotate engine.this system start functioning & increase the angle prop throu mechnically linkage NTS bracket actuate the feathering valve. This system work in only alpha range. During shut down only mechnically linkage & NTS switch serviceability checked for next flight. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 25, 2018 Share Posted October 25, 2018 3 minutes ago, Ahmer said: 1.NTS system is checked before engine shut down in air, when its ok then shut down the engine during aircrft FCF. if NTS system not functioning u could not shut down the engine for further air start. 2. The system fuction not only use during air start only, it's work during when prop try to rotate engine.this system start functioning & increase the angle prop throu mechnically linkage NTS bracket actuate the feathering valve. This system work in only alpha range. During shut down only mechnically linkage & NTS switch serviceability checked for next flight. Good Regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted October 26, 2018 Share Posted October 26, 2018 10 hours ago, Ahmer said: 1.NTS system is checked before engine shut down in air, when its ok then shut down the engine during aircrft FCF. if NTS system not functioning u could not shut down the engine for further air start. FYI, If the NTS is not functional there is an alternate procedure to restart that engine if it were required to be shutdown and subsequently restarted. This would be an unusual situation but there is a procedure for air starting an engine with an "inoperative" NTS system. Additionally, the actual NTS process or "function" is the same be it during air start or negative torque (prop drive the engine) and the systems "works" all the time however during beta operation the linkage when actuated will not cause feather valve movement due to the movement of cams rendering the NTS ineffective not inoperative. Quote Link to comment Share on other sites More sharing options...
Ahmer Posted October 26, 2018 Share Posted October 26, 2018 39 minutes ago, NATOPS1 said: FYI, If the NTS is not functional there is an alternate procedure to restart that engine if it were required to be shutdown and subsequently restarted. This would be an unusual situation but there is a procedure for air starting an engine with an "inoperative" NTS system. Quote Link to comment Share on other sites More sharing options...
Ahmer Posted October 26, 2018 Share Posted October 26, 2018 (edited) At normal FCF u can not shut down the engine with inoperative NTS system . But yes u can restart attempt of engine in only greater emergeny as per TO B-1. Edited October 26, 2018 by Ahmer Quote Link to comment Share on other sites More sharing options...
Moeed hassan Posted October 26, 2018 Share Posted October 26, 2018 1 minute ago, Ahmer said: At normal FCF u can not shut down the engine with inoperative NTS system . But yes u can restart attempt of engine in only greater emergeny as per TO B-1. Correct dear Ahmer..... Bcoz i think no one will take risk of shutting down an engine in a FCF with a known defect of NTS system.... But yes EMERGENCY situation will dictate the shut down and if required to restart the air start.... REGARDS. Quote Link to comment Share on other sites More sharing options...
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