PA28-140 Oil Pump Replacement?

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aviatrix444
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PA28-140 Oil Pump Replacement?

#1 Post by aviatrix444 » Fri Oct 16, 2015 2:53 pm

I had an old fella walk up to chat while I had the engine cowling open on my 1971 cherokee 140.

He mentioned that there was some kind of Lycoming service bulletin requiring an oil pump change after 2000 hours, but I can't find it for the life of me, and I just had it annualled last month and they didn't mention anything.

Has anyone heard of this?
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PilotDAR
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Re: PA28-140 Oil Pump Replacement?

#2 Post by PilotDAR » Fri Oct 16, 2015 4:02 pm

There is an older FAA AD with respect to the oil pumps on Lycoming engines. In large part it applies to the impellers, rather than the pump body. Do an AD search for your aircraft, and it should come up. Also review your engine log for compliance ('could be as long as 15 to 20 years ago). If you're still unsure, PM me, and I'll get the details for you, I was associated with a replacement part some time ago.

If your engine is compliant, there should not be a time limit, just condition at overhaul. If there is any chance the AD affected impellers are still installed, have them removed, they are unsafe.
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J31
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Re: PA28-140 Oil Pump Replacement?

#3 Post by J31 » Fri Oct 16, 2015 5:31 pm

This was a controversial AD that started in 1981 with 81-18-04 that required replacement of sintered iron oil pump impellers and oil pump shafts with impellers and shafts made of aluminum or hardened steel in certain Textron Lycoming reciprocating engines. That action was prompted by reports of oil pump failures.

Then they found that the aluminum impellers and shafts were failing. So 81-18-04 R2 came out in 1994 but allowing the aluminum impellers and shafts to go to 750 hours after the AD, next engine overhaul, or 5 years.

Because there was so much confusion, 2 years later AD 96-09-10 came out to clarify and extended to cover almost all Lycomings.

Bottom line you should have an oil pump with impellers and shafts made of hardened steel. No time limit on these.

It is AD 96-09-10 here: http://www.faa.gov/regulations_policies ... ection=asc
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aviatrix444
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Re: PA28-140 Oil Pump Replacement?

#4 Post by aviatrix444 » Fri Oct 16, 2015 5:59 pm

I found the impeller and case AD's (I'd already checked all that when I did the prepurchase)

So I'm thinking I'm alright.
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Re: PA28-140 Oil Pump Replacement?

#5 Post by J31 » Fri Oct 16, 2015 6:29 pm

I believe AD 81-18-04 originally called for maximum of 2000 hours time in service (TIS) on certain engines but AD 96-09-10 which superceded it reduced it to 100 hours TIS.

I remeber this issue being one big cluster #$%@ in the 1980's.

You should see AD 81-18-04, then 81-18-04R1, then 81-18-04R2, then 96-09-10 as having been dealt with in the engine log.

Non the less it should have been dealt with years ago.

Happy flying! :)
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Re: PA28-140 Oil Pump Replacement?

#6 Post by hoptwoit » Sat Oct 17, 2015 8:48 pm

I have seen many of these ADs signed off as N/A only to find out that the confusion extended to the individual signing that AD off in the book. I would check for applicability for yourself regardless of what's in the book.
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