First annual almost wrapped up

[redacted]

And here’s the results. Airframe TT 3600. Motor 1360 SMOH. Prop 245

Both flap tracks on left wing need to be replaced - parts on order
Bearing at elevator pushrod to horn replaced
New fuel selector installed
Fuel tank drains were never safetied so that’s done
Found two radio knobs and one small screwdriver in the belly. I was only missing one knob, also…free tools
ELT install from 2018 (has a remote control head unit)-battery never installed in remote
Solder joint on primer line leaking
Carb heat door control arm worn, fabricated a bushing for rod to control arm interface
AN fitting on fuel line at carb was aluminum. Has to be steel, R&R that
Door lock and baggage door lock cores removed and rekeyed to ignition key, also they now actually work
Two rivets in LH door hinge pulled out. Upsized to -5 cherry max
No drain on engine driven fuel pump (in case of diaphragm failure). Took nitrous line off my race plane and used that
Replaced two spark plugs. I dropped one on removal and the other failed on the tester, probably 6 more new ones next year
Hinge on LH cowl access door rivets all pulling out and holes figure 8’d. Fab new hinge, upsized all rivets and replaced
Fuel line from electric boost pump to gascolator kinked and had a bad wear spot. Fab new one
Replaced several zip ties that were on the engine mount (cannot touch the metal)


Thanks again for the 170 annual pain points write up. Biggest takeaway from that for us was the flap lever interface note. Mine was good by the way.

[n2582d]

Good catch on several of those squawks. My fuel drain valves were safetied through a hole in the lower wing skin which I think is .020" aluminum. Holes torn up over time. Cessna, on later aircraft, uses a clip, p/n 1726049-1, to attach this safety wire to.

Screen Shot 2023-01-06 at 10.38.24 PM.png (94.6 KiB) Viewed 819 times

[redacted]

These holes are brand new, never been safetied to! Hate it but is what it is.

[lowNslow]

Where did you find the rod end bearing for the elevator? I haven't been able to find them.

[redacted]

Spruce. It’s a KS4 bearing, on their site as KSP4. MS number is 27645

To be clear it’s not a rod end bearing but a bearing pressed into the elevator horn under the LH horizontal stab where pushrod exits the fuselage.

https://www.aircraftspruce.com/catalog/appages/ksbrng.php

[lowNslow]

Thanks.
The parts catalog shows a PN-3A (Torrington), is this the revised part number?

[n2582d]

Karl,
Nathaniel replaced item 16-6 in the IPC. Appears you’re looking for item shown in fig. 16-55, the bearing for the elevator tab. Try searching for Cessna p/n S2629-1 or S3895-1.

[lowNslow]

Karl,
Nathaniel replaced item 16-6 in the IPC. Appears you’re looking for item shown in fig. 16-55, the bearing for the elevator tab. Try searching for Cessna p/n S2629-1 or S3895-1.

You are correct, I was looking at the wrong one. Thanks.

[johneeb]

.......
AN fitting on fuel line at carb was aluminum. Has to be steel, R&R that
........................

Nathaniel, can you please give us the reference that requires fuel line to have steel fittings?

[redacted]

I’ll have to dig. Can’t remember where I dug it up in the past. Plenty of planes with AL on them they were totally fine. It’s just than between movement of the motor and resistance of the fuel line there can cause the AL fitting to work harden over time. I’ll go see if I can find it, lotta backlog to search through, heck, coulda been a tribal knowledge thing.

[n2582d]

Fig. 50-14 in the C-170B IPC shows the elbow at the carb to be AN822-6B (now MS20822-6B) which is a brass fitting. The Lycoming O-320 powered C-172s call for a 45º Parker fitting, p/n 8-4 VTX-S or Cessna p/n S2424-1 which I think is the same steel elbow. Nate, I'd forgotten that you have a 180 hp Lycoming on your 170. What fitting does your STC call for here?

The Ercoupe had AD 2002-16-04 to replace aluminum nipples at the carb with either brass or steel nipples. But in this case, it appears the gascolator is attached directly to the carb with this nipple -- a lot more weight than just a fuel hose.

[redacted]

It might be called out in the blueprints but full install paperwork I don’t have. I could check the parts manual for a Mooney, it would be the same. I’m at work, get back into the hangar next couple days.