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JEFFREY CHIPETINE replied to the topic 'Rear passenger air vents' in the forum. yesterday

Disclosure: I am not an A/P. All that follows is conjecture w/ a single success as my only data point.
Aluminum Wemac eyeball vents are possible, but this requires both some fabrication as well as an A/P who is willing to sign off on the modifications. AirMod will do this work legally as part of their interior renovation services, but TTBOMK it is not available on a stand-alone basis. Use the aluminum and NOT the plastic vents.

All that follows requires an A/P signoff at a minimum and is not a DIY closed hangar door maintenance project. If your A/P is not on-board, you're stuck w/ the OEM vents. This is detailed work that requires some skills, patience, and more time than you might imagine. Done well it is a boon and a wonderful upgrade. Done poorly, the outcome is worse than the condition of your current OEM vents.
Note: As many of our plastic headliners are 40 years old +/- you have to be careful of causing additional damages as you'll be flexing that very old plastic as you work. If you assign this work to a facility, do not be surprised if they disavow responsibility for that old plastic cracking during the attempt. There are times when the old plastic has the integrity of a potato chip. Be mentally prepared to unzip the wallet for a headliner if it cracks enroute.

Mechanically, The OEM vent w/ the awful seals and shutters is removed. A plastic sheet (buyplaneparts.com/abs-plastic-sheet-24x2...c-rated-10-2424-80a/) is cut to hold the new Wemac eyeball.. The new sheet is drilled to accommodate the eyeball. You next need to form a right angle adapter to allow the eyeball vent to neck down and come off at a right angle so that it forms a male junction over which the female vent hose is attached. You need to keep the 90 ° angle TIGHT as space is limited. Cut back a fitting and form the adapter w/ a slurry of ABS chips (buyplaneparts.com/abs-plastic-repair-chips-1-lb-10-02-80a/)and Styrene cement (buyplaneparts.com/products/Industrial-Pl...1802%252d18A%29.html) to neck down to your desired tubing size as close to the eyeball vent as is possible, then use a 90° ell to turn towards the tubing. Fabricating the 90°turning adapter is the lion's share of the creativity in this project. Take your time.

After being nicely painted to match, he finished adapter plate complete w/ eyeball needs to be fastened to the cabin structure. That can be done by using the existing mounting points for the OEM vent body. Once the headliner is back in place, a well placed seal of silicone caulk makes things look tidy. Alternatively, you can attach the sheet w/ the eyeball to the headliner, but that makes attaching the vent feed hose very difficult.

Speaking of vent feeder hose: If your vent feeder hose is black old style (cat?), consider removal and replacement w/ proper orange/silicone hose NOW. The steel in the old stuff lies against the aluminum and rusts, taking out valuable airplane parts (like the wing spar) as it ages. Removal and replacement of that hose will give you religion as it is a royal pain and your fingers will throb w/ ache for weeks afterward. No lie. If you need to do the hose replacement, do not shy away from this difficult work. You're taking away a source of corrosion that has junked more than a couple of Cessna airplanes over the years.

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Ed Fogle replied to the topic 'Buying former Canadian plane' in the forum. 2 days ago

Thanks Steve. The plane has been in the U.S. under U.S. registration for several years. Will verify logs are continuous. Was wondering if Canadians keep maintenance records differently from us.

Ed

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