0-320 oil pump AD

[RV7AAAAAAA]

Hello everyone. Trying to figure out what I will need to comply with the oil pump AD on my 0-320-E2A. I appears my driven impeller is aluminum and the idler shaft is press fit into the housing. The oil pump drive shaft does not have a woodruff key like it shows in the overhaul manual. Does anyone know if I should buy complete new oil pump or just replace gears?
Thanks
Jim

[mahlon_r]

If you are certain that neither of the impellers is made from sintered iron and that the idler impeller does not have an integral shaft and that the drive impeller has a square drive not woodruff keydrive, then this pump has no AD'S on it and can be reused in the FAA's eyes, as far as the Ad'S go. Lycoming recommends replacement of the housing and impellers to the latest style at overhaul in their SB.
Good Luck,
Mahlon
?The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at you own risk.?

[RV7AAAAAAA]

Originally Posted by mahlon_r

If you are certain that neither of the impellers is made from sintered iron and that the idler impeller does not have an integral shaft and that the drive impeller has a square drive not woodruff keydrive, then this pump has no AD'S on it and can be reused in the FAA's eyes, as far as the Ad'S go. Lycoming recommends replacement of the housing and impellers to the latest style at overhaul in their SB.
Good Luck,
Mahlon
?The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at you own risk.?

http://img127.imageshack.us/img127/5599/scan0001mx9.jpg
Mahlon Thanks for the help
How could I be certain impeller in not sintered iron. I can find no numbers on gears but one is aluminum. Drive shaft no. is 61174. Do you think I can use any of these parts for the latest style oil pump see pics above.
Thanks
Jim

[mahlon_r]

The sintered iron impeller looks like pressed metal chips to make the impeller. It is a dark color normally. The plain steel drive impeller looks like it was machined steel out of a solid piece of metal and looks silver in color. If you can't find any one to confirm that the drive impeller is the plain steel and not sintered iron, you can send it to me and I will look at it and tell you for sure.
Good Luck,
Mahlon
?The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at you own risk.?

[RV7AAAAAAA]

Originally Posted by mahlon_r

you can send it to me and I will look at it and tell you for sure.
Good Luck,
Mahlon

Mahlon I would like to take you up on this offer. Can I buy from you everything I might need? (Parts or complete oil pump) The drive impeller definitely looks like machine steel to me. If I'm understanding this correctly the following will not be used:
1. Aluminum driven impelller (no integral shaft)
2. Housing (Needs to be newer style - shaft now spins in housing)

Maybe the drive shaft and driving impeller can be reused. That's what I'll send to you.
Let me know if this is OK. Need shipping instructions email address.

Thanks again Jim
jms@acrnet.com

[mahlon_r]

If you are going to update the pump to the latest configuration, you will need both impellers and a new oil pump housing.
If the drive impeller is a square drive and machined steel and the driven impeller is aluminum without a shaft in it, there is no AD requiring replacement of these components and from the FAA standpoint you could use them all over.
We should have any parts you need from gaskets to oil pump parts, in stock.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at you own risk."

[Russ McCutcheon]

"Lycoming recommends replacement of the housing and impellers to the latest style at overhaul in their SB."

Above is a Quote from Mahlon's first reply, I would suggest that if the pump is out of the engine and in your hand then just take this opportunity to replace the hole thing, I just did this when I bought parts from Aero Sport Power for a complete overhaul. They told me they had a bag of impellers that where certified and a bag that where experimental that where the same but cost less, the total was $300 give or take a few bucks if memory serves with the experimental impellers. I?m sure that Mahlon has all the same stuff and can hook you up, its your call but if its out already then its only money to have the latest design.

[RV7AAAAAAA]

Originally Posted by Russ McCutcheon

They told me they had a bag of impellers that where certified and a bag that where experimental that where the same but cost less, the total was $300 give or take a few bucks if memory serves with the experimental impellers.

Russ - You're right I just got a quote of $181.87 (impeller gears and drive shaft)
Oil pump housing $83.50. New style set up. I was told much more than that in the past. Done deal, new oil pump on order.
Thanks to all
Jim

[RV-4]

Hello All

I just found this old thread on the Lycoming 0-320 Oil Pump AD and was wondering if anyone has the AD Number.

I'm having oil pressure problem right now ( No oil Pressure with a direct reading gauge ) eventough I had pressure last time I flew the aircraft ( Weird that it will go T/U while seating in the hangar but better there than while airborne )

Tomorrow I will remove the accessory case to have a look at the pump to see if it has a woodruff key or not and any other visual damage.

I wanna also check the Overhaul Parts List to see if the AD has been complied with.

My engine is an 0-320 E2D.

Thank you

Bruno
rv4@videotron.ca

[rhill]

Hi Bruno,
Sorry to hear of your problem,it's a head scratchier for sure,Can you post some photos of what you find?
RHill