'48 Cabin Heat

How to keep the Cessna 170 flying and airworthy.

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'48 Cabin Heat

Postby Mike Gourd » Fri Mar 13, 2020 12:01 pm

My '48 has very poor Cabin heat due to crimped scat tube between firewall and vent. Has anyone tried removing this scat tube and letting the warm air go where it will? Any reason not to try this?
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Re: '48 Cabin Heat

Postby gahorn » Fri Mar 13, 2020 5:14 pm

What serial number is your 170? What item number in either Fig 46 or 47 of the IPC (Illustrated Parts Cat) is the problem you’re discussing?
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Re: '48 Cabin Heat

Postby n2582d » Fri Mar 13, 2020 5:33 pm

Reading the first and last entry here it appears that removing the ducting aft of the firewall doesn't help with heating on your '48. I would suggest getting a field approval (if your IA doesn't consider it a minor alteration) to convert to the late B model heater system. Lots written about that on this forum.
'48 Cabin Heater System.png
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Last edited by n2582d on Fri Mar 13, 2020 6:31 pm, edited 1 time in total.
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Re: '48 Cabin Heat

Postby Mike Gourd » Fri Mar 13, 2020 5:54 pm

Serial no 18109 . Figure 46. There was the wrong size scat tube (too large) with wire removed and it was kinked. We fixed it with a piece of 2" scat today. I will see how it works, next time I fly. What a cramped place to try to work.

Thanks for your reply
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Location: Nova Scotia CDL8


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