Cooling fan failed on GTN750

[Philip France 13]

Hello

Just installed full new panel G3X, GTN750, GTN650, GFC500, GTX345, and DME, ADF,

After few test flights today got following message : Cooling Fan of GTN750 failed,

External Temperature on the ground was quite high close to 100F,

The company that installed my instruments replaced the failed fan,

My question is : are there recommendations for installing an additional cooling?

My model is M20J MSE of 1993

Panel picture attached

Philip

 

 

[kortopates]

Garmin says no other cooling fan is required. My original Mooney fan was removed and i’ve never had an issue with stack of GTN’s (750 + 650)

Sent from my iPhone using Tapatalk

[Philip France 13]

Thank you

[Philip France 13]

Hello it works after GTN750 cooling fan has been replaced,

Made a test flight today the ambiant temperature here in south of France is still very high above 100F,

Best Regards

Philip

[Fly Boomer]

On 8/3/2022 at 2:05 PM, Philip France 13 said:

ambiant temperature here in south of France is still very high above 100F,

Must be at or near a record.

[LANCECASPER]

On 8/3/2022 at 2:05 PM, Philip France 13 said:

Made a test flight today the ambiant temperature here in south of France is still very high above 100F,

We call that Spring in Texas.    

[Patrick Horan]

4 hours ago, LANCECASPER said:

We call that Spring in Texas.    

Thats a nice late winter in Arizona!

[carusoam]

Note for Philip…

Cooling fans on GTNs have a quirky history… a few have failed around here…

They are easy to replace…

More of a fan quality issue than a temperature or install issue…

PP thoughts only, stuff I have read around here…

Best regards,

-a-

[cbarry]

I think it may have something to do with the amount of heat that ADF is throwing off trying to keep up with its modern panel mates! Great looking panel!

[Philip France 13]

Hello : I did make few flights after repair and replaced new fan, about 10legs, 15 hrs, and is working fine so far

[carusoam]

Great follow-up Phil!

 

Best regards,

-a-

[PT20J]

Thirty years ago I was an engineering manager at a company that made telecom equipment. A large telephone company central office would have row after row of 11.5' high racks of equipment. Bell specs forbade cooling fans because fans had the lowest MTBF of any installed equipment. You had to design assuming your equipment might be at the top of the stack with everything below heating your box up.

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