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airman57

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  1. It looks like the fuel system problem (in my opinion) But why did RPM drop? (under %80 RPM......) Engine was go from %100 RPM to %80 RPM in flight.then flight crew shut down the engine. (When failure occure) Engine values firstly indicate torque :15.000, tıt:1050 C , fuel flow :2400 pph.After this situation RPM should not drop when the engine fuel flow,tıt,torque increase. (because engine's power is very high) (I don't understand this situation.) I NEED MORE TECNICAL INFORMATION FOR THIS FAILURE.THANK YOU pjvr99,tenten,DanGothe,
  2. (Approx.value) ENGINE NO.1 ENGINE NO.2 ENGINE NO.3 ENGINE NO.4 TORQUE 1000 IN.LB. 1000 IN.LB. 1000 IN.LB. 15.000 IN.LB. TIT 550 C 550 C 550 C 1060 C FUEL FLOW 600 PPH 600 PPH 600 PPH 2400 PPH (AT 4000') and RPM DROPED %80
  3. ''DURING AIRCRAFT DECENT (LANDING) (FIRST OF ALL) ENGINE 4# FUEL FLOW,TIT AND TORQUE SUDDENLY INCREASE,(THEN) RPM IMMEDIATELY DROP%80 WHILE THROTTLE AT FLIGHT IDLE.(BELOW XOVER) FLIGHT CREW SHUT THE ENGINE AT %80 RPM'' (EMERGENCY) NOTE: Flight crew said that no change temp.datum valve switch in null position. WE CHECKED THE ENGINE: 1.Operational Checkout of Throttle Control System------------------------------ (no problem) 2.Operational Checkout of Engine Condition Control System---------------- (no problem) 3.Operational Checkout of Propeller - Static Condition---------------------------(no problem) 4.Inspection of Engine Power Section (with baroscope)------------------------ (no problem) 5.Power section and Reduction gear box mag.plug check----------------------(no problem) 6.Electrical Components Check Using Electrical Components Checkout Test Set----------(no problem) 7.Check of Temperature Datum Control System With Engine Static UsingTest Set--------(no problem) 8.We run the engines for run-up control--------------------------------------------------(no problem,all of indications were normal.) WE DECIDED TO CHANGE THE FOLLOWING PARTS AND WE CHANGED. 1.Valve Housing 2.Main Fuel Control 3.Fuel Enrichment Valve (THEN AGAIN) (AFTER CHANGED THE PARTS) WE RUN THE ENGINE FOR CONTROL.(NO PROBLEM) WE DECIDED TO FLY THE AIRCRAFT (TO CONTROL FLIGHT) AND AFTER TAKE OFF WHILE CLIMBING. (APPROXIMATELY AFTER 7-8 MINUTES) SAME PROBLEM WAS OCCUR IN FLIGHT AFTER NTS CHECK WHILE ADVANCE THROTTLE FROM FLIGHT IDLE TO XOVER POINT.(APPROXIMATELY ABOVE 1 INCH OF FLIGHT IDLE DETENT) NOTE:FLIGHT CREW SAID THAT NTS CHECK WAS SUCCESS IN FLIGHT.BUT...(TWO TIMES EMERGENCY) ANYONE CAN GIVE SOLUTION.
  4. CABLE MAY BE FAILURE (BETWEEN TEMPERATURE DATUM CONTROL VALVE WITH TEMPERATURE DATUM CONTROL) (SOMETIMES OCCUR) TEST THE CABLE OR CHANGE IT WITH THE OTHER ENGINES.
  5. HI,PJVR99...AND OTHER GUYS... IN GENERAL,WE SAW A LOT OF CHUNKS OF METAL ON MAGNETIC PLUGS. SOMETIMES,WE SAW JUST FUZZ ON MAGNETIC PLUGS. AVARAGE OPERATING TIME OF REDUCTION GEAR BOXES ARE 2000-2700 HOURS. IS IT NORMAL? WHAT OPERATING TIME ARE REDUCTION GEAR BOXES OF THE OTHER COUNTRIES?(AVERAGE) MAYBE OUR OIL (MIL-L-7808)IS INSUFFICIENT FOR LUBRICATING.
  6. THANKS PJVR99,PARROT,TINY CLARK we have some reductıon gear box problems nowadays. there is out of limits metal accumulation on our reduction gear box magnetic drain plugs. And consequently, we changed a lot of r/g boxes. I doubt whether that our engıne\'s lubricating is insufficient.(MAYBE) All in the same breath (for once) we changed engine because of Accessory drive section magnetic drain plugs. Before time as I were said,we use MIL-L-7808 OIL. Therefore I doubt whether (our lubricating oil)(MIL-L-7808) is it problem for lubricating? What can I do now? I need your advise.thanks.good days.
  7. OK.THANK YOU VERY MUCH FOR INFORMATION.BUT................ WHAT DO YOU ADVISE FOR T56-A-15 ENGINES? T.O.1C-130B-1 SAYS MIL-L-23699 (AT NORMAL OPERATING CONDITION) BUT MAINTANACE USAF T.O\'s.SAY MIL-L-23699 OR MIL-L-7808(BOTH)FOR ENGINE,GTC,ATM. WHAT WILL I DO? WE HAVE MIL-L-23699 AND MIL-L-7808 WHICH ONE IS BETTER THAN FOR LUBRICATING?
  8. HELLO,EVERYBODY. I WANT TO LEARN ABOUT C-130\'S ENGINES OIL (TECHNICAL INFORMATION) FROM YOU. WE USE MIL-L-7808 ENGINE OIL FOR OUR T56-A-15 ENGINES. T.O.1C-130B-1 SAYS MIL-L-23699 (AT NORMAL CONDITION) BUT MAINTANACE T.O.SAYS MIL-L-23699 OR MIL-L-7808(BOTH) WHICH TYPE OIL DO YOU USE? WHY? WHAT DIFFERENCE?BETWEEN MIL-L-7808 ENGINE OILS AND MIL-L-23699 ENGINE OILS? WHICH OF THEM IS GOOD FOR C-130\'S ENGINES? WHICH TYPE OIL DO YOU USE IN USAF OR IN THE OTHER FOREIGN MILITARIES?WHY DO YOU USE MIL-L-23699 OR MIL-L-7808? CAN YOU HELP ME? I NEED YOUR ADVISE.I WILL BE HAPPY.THANK YOU EVERYTHING.:)
  9. EXCUSE ME.I AM TOO LATE. OUR PROBLEM IS OK.NOW. FINALY,WE CHANGED STARTER BUTTON AGAIN. (MAY BE) FAILURE WILL OCCUR AGAIN.BECUSE FAILURE DOSEN\'T OCCURE EVERY TIME.THANK YOU FOR YOUR ADVICE. THANK YOU VERY VERY MUCH..... Steve1300 pjvr99 Gmon Lkuest APUnit I WILL WRITE TO YOU IF OUR FAILURE OCCURS AGAIN. SEE YOU LATER. BYE....
  10. OUR AIRCRAFT HAVE GTC.OUR GTC IS GOOD. BECAUSE GTC MANIFOLD PRESSURE IS 42-43 PSI.(AT THE BLEED GAGE) GTC MANIFOLD PRESSURE DROPS 26 PSI DURING ENGINE ROTATION (WHEN PUSHED THE STARTER BUTTON,FISTLY) THEN IT STAYS 30 PSI DURING ENGINE STARTING CYCLE.THIS CONDITION IS NORMAL.BUT ENGINE STAGNATION AT %10 RPM.(SOMETIMES)(IT IS NOT EVERYTIME),(IT IS NOT ALWAYS)(THIS FAILURE DOES NOT OCCUR ALWAYS.) FOR EXAMPLE AIRCRAFT IS FLYING AT THE DIFFERENT LOCATIONS.(IN ALL 8-10 SORTIE)WE SEE THIS FAILURE ONE TIME OR WE DON\'T SEE THIS FAILURE. AIRCRAFT FLY FOR DAYS,NO PROBLEM. BUT SOMETIMES THIS FAILURE OCCUR AND I AM FEELING BAD THINGS AT THIS TIME.IF THIS PROBLEM OCCURS ALWAYS I WILL SOLVE THIS ENGINE PROBLEM. NO FUEL FLOW,NO IGNITION,NO TIT AT %10 RPM.BECAUSE OF THIS REASON IT IS NOT IMPORTANT------(TRYING THE START \'\'NULL\'\'OR \'\'AUTO\'\')IT IS NOT FUEL SYSTEM FAILURE OR T/D SYST.FAILURE.IT SEEMS THAT A BLEED AIR PROBLEM. WE CHECKED PROPELLER BLADE ANGLE. GROUND IDLE ANGLE:5 DEGREES WE TRIED TO START ANOTHER ENGINE BLEED SOURCE AT HSGI.SOMETIMES SAME PROBLEM WAS OCCUR,SOMETIMES IT WAS NOT OCCUR.OUTSIDE AIR TEMP.18 C DEGREES,ALTITUDE 2800 FEET.IT WAS OCCUR AT SEA LEVEL TOO.
  11. ALSO WE CHANCED COMPRESSOR BLEED AIR CHECK VALVE AND ENGINE BLEED AIR VALVES (5. AND 10.)
  12. OUR ENGINES ARE T56A15. SOMETIMES WHILE STARTING, ENGINE RPM IS STAGNATION SOMETIMES AT %10 RPM------------(NO FUEL FLOW) SOMETIMES AT %40 RPM------------(YES FUEL FLOW) SOMETIMES AT %50 RPM ALSO TIT AND FUEL FLOW IS STAGNATE.---(AT YES FUEL FLOW) BUT THIS PROBLEMS DO NOT OCCUR EVERY START (EVERY TIME) WE CHANGED: STARTER CONTROL VALVE STARTER ENGINE BLEED AIR VALVE (AT FIREWALL) STARTER BUTTON (AT FLIGHT DECK) CHECKED BLEED AIR DUCT FOR AIR LEAK. CHECKED ELECTR.CABLE PROBLEM IS CONTINUE FROM TIME TO TIME. CAN YOU HELP ME? FOR YOUR ADVISE.THANK YOU EVERYTHING.
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