Updated Continental 79-01 Connecting Rod Piston bushings ICA

[Learjetter]

FYI

MEL-79-01 - Oil - Transmittal of Continental Aerospace Technologies CSB07-1A Connecting Rod Piston Pin Bushing Inspection (Models: Multi Engine A/C) Compliance: M - Date: 04/21/2021

PS: does anyone use a shorty-quick drain plug mechanism on the front engine? Any recommendations for magnetic quick drains for either engine?

[JAG]

Great quick drain for front engine - is STC'ed.
Jeff

https://bogertaviation.com/collectio...024nm-complete

[TomM]

I have the Saf-air quick drain installed on the front engine. The only requirement is that when installed the gear has to be retracted and verify that there is a specific gap between the plug and the landing gear. I had plenty of room on mine. It is the F62 model that fits our engines

https://www.saf-air.com/products/oil...eoildrainvalve

[mshac]

I'm sure the STC'ed ones are fine, but the Service Manual has a big warning saying not to use a quick drain as it could interfere with the nose gear transit. It looks like a "short" quick drain will work, but not a normal one. YMMV.

Here is the correct one for our Skymasters for $115 from Wag-Aero: https://www.wagaero.com/low-profile-...es-p-nf65.html

I've attached the section from the manual.

[JAG]

My recommendation for the STC'ed Bogert quick drain valve does not interfere with the nose gear. I am an experienced mechanic. I have installed one on my C337A, swung the gear and verified the clearance. It is not an "external" quick drain, you have to have a tool that pushes up "internally".

Thought I would clarify - I don't make recommendations on this site that I have not researched or validated.

Jeff

[mshac]

JAG, in looking at the drain valve, it appears that the threads are higher than the bottom of the oil pan, which would create a situation whereby the last bit of oil never gets drained. This is why we are told not to use oil suckers like boats and cars use to change oil, because it may not get it all out, leaving sludge and metal particles in the oil pan.

My perception may be incorrect about the quick-drain valves, any comments?