Forum: General F-16 forum

I have a block 30 'D' model that fails every step. First time it only failed the steps that were related to dual FC light. Now it's every step with an FLCC dot. This started after an ECA was changed for a Autopilot problem. We have changed the FLCC, ECA, Seat data recorder (per the T.O.), FLCP, wiggled lots of wires with same results. The word reader shows no faults however when I check for data word input (set the dial to 75 and to data word) the word reader shows good data input from the FLCC and ECA. Now it comes up with the PRY light coming on first advance on the test panel. This will happen for several times, then it starts working properly. Then it will fail again. It also had a previous problem and failed step 42. The guys changed the ECA for that. then after the ECA change for the autopilot problem, pilot reported it stopped at step 1 with FLCC dot. Night shift checked and it was good. It repeated again and passed everything else. Then ran throught fine. I've never seen a problem like this. Any ideas? Thank you in advance for any help and ideas. We've checked wirie reporting from FLCC and Eca to the FLCP. All good.

F-16.net Sponsor

Ditch the Word Reader and use the Viper MLV AFLCS troubleshooting program. You may also have a problem with bad parts. Run the ones that have failed in the AIS and see what is wrong with them, if there is a common failure, find out what can cause it. Use your Lockheed rep to assist you.

Best Regards,

You might also try and clean up all your grounds on your ISA's.....

Check your MLG WOW switches for proper rigging. You'd be suprised what that can do to FLCS system.

Inspect the seat data recorder harness. By this I mean unclamp the harness along the side of the seat and check carefully for breaks in the wire at the clamps, particularly the one closest to the SDR. Telltale sign is also harness braided cover worn very thin. Should have thought of this sooner. Good luck!

Best Regards,

Thank you very much. I will try those ideas.

This is a new one for me. We first had an autopilot that would not engage. We replaced the ECA and then our FLCS problems started. We decided to Trouble shoot the autopilot problem. WE found a short to ground at Plug J203 Pin 33. This is under the left forward glareshield for the autopilot switches. We traced the short to a chaffed wire in the rear cockpit under the seat next to the audio amp. That wire was repaired and the autopilot checked good, but the FLCP still failed. We put it in another jet and it failed there. The panel was replaced and now everything is good. AIS reported that the 3 ECA's that we sent them all had bad circuit cards. We also found a caution in the 27FI fault tree 27-00-DA/DD that says "An ECA malfunction may cause burn out of FLCP." The shorted wire caused the ECA fault which in turn damaged the FLCP.
Any words of wisdom to understand this?

The only way to get this kind of answer is to have your Tech Rep write an FSR describing the situation and ask Lockheed to explain it. We have a real smart guy there who lives and breathes this kind of stuff.

Glad you got your problem fixed!

Best Regards,

JoeSambor wrote:

We have a real smart guy there who lives and breathes this kind of stuff.

But, I'm not there any more....

Just kidding... Joe's right though, the flight control folks @ FTW love these kinds of problems

Smitty

Rick Vanek.

Best Regards,

Thank you Joe. I appreciate your responses and help. We don't have a tech rep with us but I have emailed Rick Vanek and he has helped us in the past. I do enjoy your input and thank you for taking the time to answer.
Thank you

good afternoon,i have p light on.when the aircraft get 8 G.but in the ground,is good.who can tell me about this troble?

Forum: General F-16 forum

Block 30; FLCS fails every step