Nc97 Posted June 27, 2011 Share Posted June 27, 2011 I know the 1C-130H-2-21JG-10-1 states that the Engine Pressure Regulator must indicate between 38 and 52 PSI, or between 70 and 74 PSI for AC-130U airplanes, or between 56 and 70 PSI for MC-130E/H/W airplanes in the "ON" position, but what does the -1 Flight Manual mandate? Looking for an agreement (or disagreement) between the maintenance manual and the flight manual. Thanks. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted June 28, 2011 Share Posted June 28, 2011 Regulators should indicate within approximately 3 psi of each other. With all engine bleed-air switches to ON, bleed-air pressure should be approximately 50 psi. The 3 PSI is the limitation as if they "are not" within 3 PSI you must place them in "OVERRIDE" or "OFF" depending on what book you have... The problem I have with that is if you turn them "OFF" on the outboard motor you invalidate your VMC numbers which are based on "normal bleed"... Quote Link to comment Share on other sites More sharing options...
topboltsto400 Posted June 28, 2011 Share Posted June 28, 2011 W flt manual says 63+/-7 (or 56-70..half dozen one way, 6 the other). Not sure of the current page number as my (home) -1 doesn't get the changes, but it is section 2 under the "Starting Engines checklist" Hope that helps. Quote Link to comment Share on other sites More sharing options...
bischoffm Posted June 30, 2011 Share Posted June 30, 2011 They are doing or a TCTO so maintenance can add a digital pressure gauge to adjust the regulator within those T.O. limits. Some AC may not be done yet! Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted July 1, 2011 Share Posted July 1, 2011 No matter the number (+/- 3, 7, whatever) if you turn OFF the bleed air your VMC numbers are wrong as there will be MORE torque than the charted airspeed number accounts for....it will be TOO LOW... more yaw, same airflow over the rudder... Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted July 1, 2011 Share Posted July 1, 2011 No matter the number (+/- 3, 7, whatever) if you turn OFF the bleed air your VMC numbers are wrong as there will be MORE torque than the charted airspeed number accounts for....it will be TOO LOW... more yaw, same airflow over the rudder... Mostly true, but if you had 19.6 with or without the bleeds off, VMCA will be the same. They recently took the VMCA increase reference out of the performance manual as well....not sure why though. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted July 1, 2011 Share Posted July 1, 2011 Ok....19.6 is 19.6 Any (Take Off) with "Maximum" torque setting with the bleeds closed (less than 19.6) and your VMCA charted speed will be TOO LOW..... Closing the Regulator will cause an approx 600 inlb increase in torque. VMCA speed is based on Maximum torque WITH normal bleed.... not plus 600 inlbs. Quote Link to comment Share on other sites More sharing options...
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