Crank AD 2012-19-01
- Thread starter darylp
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Skylane81E
Final Approach
AD text trumps
Sit tight..... Our resident aircraft engine guru.. Ted... Is probably enroute from vacation.... He will know the details more then anyone else....IMHO..
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flyingmoose
Pattern Altitude
If your S/N is listed, yes:
(1) If Table 1, Table 2, Table 3, or Table 4 of Lycoming MSB No. 569A, dated April 11, 2006,
lists your engine serial number (S/N), and Table 5 of MSB No. 569A, dated April 11, 2006, lists your crankshaft S/N, replace the affected crankshaft with a crankshaft that is no
t listed in Table 5 of MSB No. 569A at the earliest of the following:
Does your S/N fall in that list?
Oh and welcome to POA!
(1) If Table 1, Table 2, Table 3, or Table 4 of Lycoming MSB No. 569A, dated April 11, 2006,
lists your engine serial number (S/N), and Table 5 of MSB No. 569A, dated April 11, 2006, lists your crankshaft S/N, replace the affected crankshaft with a crankshaft that is no
t listed in Table 5 of MSB No. 569A at the earliest of the following:
Does your S/N fall in that list?
Oh and welcome to POA!
Tom-D
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All IO-360 engines are effected:
(c) Applicability
This AD applies to Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, IO-390, AEIO-390, O- 540, IO-540, AEIO-540, (L)TIO-540, IO-580, AEIO-580, and IO-720 series reciprocating engines listed by engine model number and serial number in Table 1, Table 2, Table 3, or Table 4 of Lycoming Mandatory Service Bulletin (MSB) 569A, dated April 11, 2006, and those engines with crankshafts listed by crankshaft serial number in Table 5 of Lycoming MSB 569A, dated April 11, 2006. These applicable engines are manufactured new, rebuilt, overhauled, or had a crankshaft installed after January 1, 1997, according to Supplement No. 1 to Lycoming MSB No. 569A, dated May 27, 2009.
Was your engine overhauled or had the crank replaced after 1997?
That's when these cranks were made. any thing prior is not effected.
LearDriver
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Gdriver
We just had to replace a perfectly good mid-time O-540 due to this. It only cost 40K to comply with this.
Though there may be something to this. Because the new engine is night and day better running and smoother than the one that got replaced. Also noted is that in 99 when this just replaced engine was put in, it was the second one that was sent out by Lycoming. The reason was that the first one ran really rough and made metal within the first 15 hours.
Though there may be something to this. Because the new engine is night and day better running and smoother than the one that got replaced. Also noted is that in 99 when this just replaced engine was put in, it was the second one that was sent out by Lycoming. The reason was that the first one ran really rough and made metal within the first 15 hours.
Ted
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iFlyNothing
I hear a lot of people talk about replacing a "perfectly good" crank.
Does that mean we replace "perfectly good" oil at our oil changes? After all, we aren't seeing any lube system issues yet...
Does that mean we replace "perfectly good" oil at our oil changes? After all, we aren't seeing any lube system issues yet...
poadeleted20
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Well, not all of them -- just the ones whose engine or crankshaft serial numbers are listed in MSB 569A.
bnt83
Final Approach
But for the sake of discusion the AD does apply until proven otherwise and documented as such. If you had a "flyaway can" for a your rental plane, I would expect to find this AD in there.
poadeleted20
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bnt83
Final Approach
Ted.... I respectfully disagree... You have a flawed analogy..
Oil is perfectly good when sold and breaks down from use....
Lycoming cranks were NOT perfectly good when they were sold to customers.... Hence the AD...
poadeleted20
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I guess, then, you would say every AD applies to every aircraft until you've checked to see if it applies to yours.
bnt83
Final Approach
I guess, then, you would say every AD applies to every aircraft until you've checked to see if it applies to yours.
Ever look at an appliance AD list and just wonder what make/model/serial altimeter really is in the hole or if one those texas instruments or potter brumsfeld circuit breakers are in it?
Ted
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iFlyNothing
Actually, that's my exact point.
When you change oil at 50 hours, it's no longer perfectly good. It's broken down from use. Your lube system still outwardly looks good, but you're going to hurt your engine tremendously if you don't change the oil.
And the cranks, they ain't perfectly good, either! Continued use may result in a break down of a very unpleasant sort!
The difference is the cranks were never good, and thus should be replaced. The oil gets no longer perfectly good, and need replaced.
Tom, eng was overhauled in 2003, crank was not changed. That was first overhaul. Looking for crank serial number now.
bnt83
Final Approach
Be great if you can find a yellow tag for the possible work the crank received at overhaul.
Skylane81E
Final Approach
Well if it was not replaced then when was it manufactured?
When reading an AD look for a legitimate way out of it, not for a reason to have to do it.
I'm always amazed to see log book entries for AD inspections that didn't apply. Recently looked at the logbooks on a PA32-300 where the prop had been getting removed regularly to comply with an AD that stated right in the applicability section that it only applied if the prop was installed on a 360
Skylane81E
Final Approach
Going from memory here, isn't the S/N stamped on the flange? I may well be wrong, been quite a while since I have had to do this AD/SB on anything.
bnt83
Final Approach
It should be. But it may not be visable with the prop, spinner and ring gear installed.
Skylane81E
Final Approach
When in doubt the option always exists, and if paying for the mechanic to research it it can be cheaper too...
wickedsprint
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Does the (L) mean left spinning engines?
Skylane81E
Final Approach
Tom-D
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Yes Ron, It applies to all IO-360 engines.
If it did not there would be a list of the ones that it applied to.
It applies until you prove it does not. and it will be signed off in the aircraft records as such.
Tom-D
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There is one action that should be completed. Wouldn't you like an entry in the maintenance records that states this AD does not apply due to crank shaft serial number ______.
That way some duffus buyer can't say the AD is due.
bnt83
Final Approach
+1
Even if the crankshaft is not affected, an entry will be going into the logbook saying so.
Skylane81E
Final Approach
Good habit to be in, when ever I get notice of a new one I check it out, and if there is any doubt of its applicability I make a Log entry on the spot