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Aero Precision provides OEM part support for military aircraft operators across more than 20 aircraft


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Posts posted by tinyclark

  1. On 6/21/2021 at 2:10 AM, Bigfoot said:

    I well remember my days up in the nose wheel well of C-130s on the frozen, wind blown flight line at Elmendorf replacing APN-59 RTs and antennae alone, freezing to death and breaking my back without any help. That system was at least half our workload there which included ALL avionics systems, as we were severely undermanned and expected to fix it ALL right after we transitioned from AAC to MAC. As they told me right after I got there from Moody AFB in December 1979, “You’re no longer a comm/nav troop. You’re an avionics troop”.

    Been there, done that way too many times. 


  2. On 3/31/2009 at 2:29 PM, GaryRobinson said:


    Did you ever get the s*** knocked out of you trying to adjust the centering on one of the IP-268 scopes. I did, three times in a row setting at Cam Rahn Bay. I was cpvered with sweat and told the shop chief I quit for the day my hands were shaking so bad.


    Gary Robinson

    I know this is old and you may not see it, but yes. I started wrapping F4 tape around my scribe, should have worn a leather glove to hold the scope.

  3. Anderson pretty much covered everything. Therer are still ARN6 ADF systems on some H models as far as I know, but I've been retired for 10 years.

    I probably repaired close to a thousand RT-289s in my career. Early on after training on them, I started replacing the TR and ATR tubes on every one, as well as the PFN if it looked the slightest bit swelled. Our MTBF went up quite a bit.

  4. You can't TDR antenna lines for this system because of the reciever sensitivity of the RT unit. It is over -140db if memory serves correctly. You can rebuild the connectors,  build new cables or swap with another aircraft to see if it fixes the problem. A majority of these kinds of problems are the cables/connectors. Not sure where your R/T is located, or how long the cables are. I built a set of cables just for troubleshooting for several of the different platforms I worked. Also, are there any in line connectors in your aircraft? 

    Do you guys still have NATEC civilians?


  5. Munir, since it makes no difference which phase is monitored, any phase could be used. I have no idea why they chose phase C. Maybe the relay was closer to a phase C connection. The only person that probably knows is the engineer who designed it back in the 1950's.

    Sometimes, I think you think too much about these details. 😅

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  7. Don't know why the #1 system pressure would affect #2. The worst thing the USAF did was put two 99.9% error free systems on the same bird. Woud have been so much better without the second system. The RF interlock system is ridiculously designed. I don't see that causing your problem. Wish I could be of more help.



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