pjvr99

Engine will be cold at 1st start making harder for starter to turn engine. Also FCU will be cold making CIT and CIP bellows

respond differently.  2nd and 3rd start components, gearbox etc. will still be warm and make spin-up easier. Adjusting

TD amp will make little difference as it is only limiting the maximum fuel flow during startup. I see this regularly

on both A15 and D22A engines.

As long as start TIT is between 750 and 830 (780 to 810 desired) and start time is between 39 and 61

seconds (GTC/APU start), there is nothing to be concerned about.

Merry Christmas, may it be safe and blessed

.

Had it translated,

Peter, I think he mixed up with different things: translation: the plane leand left, engines are at 19600lbs, brake applied...
3 services shock absorbers serviced, brake lock pressure ok...
Dissymetrie fuel checked with manual and ok..
Do you have a solution or experience?

As I understand it:

 during runup with engines at 19600"lb, aircraft was left wing low. Fuel quantity balance was manually/dipstick checked ok. struts were serviced/checked 3 times. brake pressures ok. 

turbine change - lab seal has failed

83282 or 87257

C2 inspection would be my best guess. Its all in card C37

yes, thats it. if your rpm flux is only +-0.5 you appear to be within limits. however, if the crew is

uncomfortable you will have to do something. out of curiousity, did you do a fuel governing

and pitchlock check?

if by weather you mean cloud or rain, changes in air density going into compressor will be

detected by fcu cip & cit probes. as the throttle is already pulled back, a weak valve housing

may not be able to hold the rpm steady. 1c-130h-2-71jg-00-1 gives rpm 1.5% total travel

with throttle below flight idle, and 1.0% with throttle above x-over and more than 8000"lb

torque. valve housing change is the quicker fix, but you may end up changing fcu. as an

after-thought, check the time on dome quad-seals. 

Saw this article yesterday .....

https://www.defensenews.com/air/2019/08/08/air-force-pauses-flight-ops-for-more-than-a-hundred-c-130s-after-atypical-cracking-found/

ah i missed the empenage bit. there should be no way for that to happen, unless you have

a problem with bleed air regulators. What happens when you turn on a/i with only the 

affected engine bleed air open?

This can be easily verified by disconnecting the CIP line to the FCU. Do engine run. If power still

increases with a/i on. Remove and inspect/replace the cone shaped air inlet fitting in the strut

at 3oclock position (looking into engine intake). You're getting anti-icing air into your CIP line

making FCU add fuel.

OK, so disconnect the LCV cannon plug and start APU. Once APU is on-speed (Load light on), open

the bleed air and check for 24 to 28 VDC. Chase the problem back from there

"not supply air" - do you mean load control valve is not opening, or load control valve is not holding load?

Any luck with your beast WINDTUNNELMEC?

wow, that is a little warm ..... try decreasing the CIT setting (1 flat is +-25°C/45°F), then trim it using TD valve NULL orifice adjust

what is max power fuel flow and TIT? For that matter what is start TIT, TIT & ff at LSGI and normal ground idle?

Not for this problem Paulo. I have previously had LOW SPEED GROUND IDLE rpm

that was either to low or high. Low GROUND IDLE/FLIGHT IDLE rpm can not be

adjusted on fcu.

OK brand spanking new FCU and GI rpm is 96.2%. Still lower than what I'm used to

seeing, but at least the FSR will engage the generator.

I will certainly share if we can find a solution

4 hours ago, Ahmer said:

Hello pj , when u put the engine to  normal ground idle, Gen frequency on frequency meter available at GEN switch on OFF position.?

ahmer, this is the problem. we have 380hz/95%, but fsr needs 385hz to engage. fsr is working correctly. engine is also 

working correctly but too slow for fsr.

2 hours ago, NATOPS1 said:

Ok got it. ANY pictures? (if allowed)

Guess you can swap out the FSR maybe it has an issue or increase the GI/FI RPM closer to the upper limit.

If you reset the gen will it go on line without speed increase?

if you speed up the engine and get the generator on line will it stay online when slowing back to 95%

 

no pics, sorry. swapped out fsr, regulator and control panel - no change. silly question, i know, but ...... how 

do you adjust gi/fi rpm? yes it resets immediately, and will happily stay on line after that, even at low pitch

stop of 93.some %. yes, fsr will drop it out below 365hz. fsr comes on line at 95.2/95.3% which is the

advertized 385hz needed. propeller control is EPCS, so no messing with blade angles

Moeed, it is a zero time engine. 

NATOPS1, aircraft is glass cockpit, so I believe indicated rpm to be same as AUTOTACH. It does match

generator frequency. Problem is what to do to get off that 95% GI rpm. Changing the engine only puts

the problem on the ready line for the next time

Hey guys

Here's a problem that has me stumped. Engine starts up to LSGI (auto & null TIT peaks

about 810°C). When upshift to NGI engine rpm is 95% and generator will not come on 

line. You need to manually reset ON or move throttle to speed up the engine. All engine 

parameters are good at all throttle settings, IBIT check good. Only GI/FL rpm is

lower than usual, but not out of limit. Generator circuits check good, with all relays,

control panel etc having been replaced, and even generator replaced. 

Any thoughts on this issue would be appreciated

PJ

remember modifying the vehicle ramps with rollers on top, skids on the bottom. open the ramp till just above ground, flip out the 

vehicle ramps, and start taxiing slowly while the loadies push pallets out - fastest unload other than LAPES.