MSB-E4-034 High Pressure Fuel Pump driving gear
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- Donkadillapig
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Thanks for the wise words Dan.... I'm headed to the hanger later and will do exactly that.
- VickersPilot
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
I agree with Dan - if your arteries show up clear in the scan, don't do heart surgery just to check.
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
That is correct for MSBE4 035, but MSBE4 034 requires you to check the serial numbers of your HP fuel pump irrespective of the cylinder head fitted.
- Donkadillapig
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Thanks all for the input... But that's exactly where it gets confusing.
We got the cowling off last night, I found and photographed the raised Mercedes Benz lettering on my cylinder head. Great! 035 complied with and in some theories I'm in good shape.
However..... on 034, my engine serial number was listed! So what then?? Does 035 supersede 034?
And where then does that put me with the AD?
We got the cowling off last night, I found and photographed the raised Mercedes Benz lettering on my cylinder head. Great! 035 complied with and in some theories I'm in good shape.
However..... on 034, my engine serial number was listed! So what then?? Does 035 supersede 034?
And where then does that put me with the AD?
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Steve, you still have to have the HPP driving gear inspected per MSB 034 since your engine serial number was listed there.
Epic Aircraft E1000 GX
Former DA40XLS, DA42-VI, and DA62 owner
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Former DA40XLS, DA42-VI, and DA62 owner
ATP, CFI, CFI-I, MEI
- Karl
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Dave, I think the eng serial numbers are listed just because that is where Austro records show it as where a suspect pump/gear was fitted. The pump may have been removed since it left the factory.
It is the fuel pump serial numbers that are important.
The SB states that it affects all E4/E4P having an affected part installed.
The affected part is a gear/fuel pump combination as listed in the table.
So if your engine has a fuel pump with a serial number listed then you are required to carry out the SB.
- Karl
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Didn't you already talk directly with Diamond about this when the SB was first issued and they told you that yours is OK?Donkadillapig wrote: ↑Wed Nov 03, 2021 1:12 pm Thanks all for the input... But that's exactly where it gets confusing.
We got the cowling off last night, I found and photographed the raised Mercedes Benz lettering on my cylinder head. Great! 035 complied with and in some theories I'm in good shape.
However..... on 034, my engine serial number was listed! So what then?? Does 035 supersede 034?
And where then does that put me with the AD?
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Technically, MSBs are not an AD and not required.
However, this is a really serious problem for anyone with an Austro engine (which includes me). Karl is making the right point. An HPP failure in flight is total loss of thrust and if it distributes metal chips into the engine then you'll need an entirely new engine after you make your successful emergency dead stick landing. There is one of those at my service center now, waiting for a new engine from Austria.
If your engine or pump s/n is on the list, or there is any ambiguity, my suggestion is to not fly again, or fly no further than necessary, until you know you are in the clear, or know you need a new HPP or cylinder head, or both.
Nobody can be happy about this, but it's better than becoming a glider pilot on a moment's notice at a location not of your choosing.
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Re: MSB-E4-034 High Pressure Fuel Pump driving gear
Agreed, SB's are not legally mandatory, an AD is issued when the authorities think it should be.
FAA AD 2021-22-20 (there is an EASA AD too) relates to MSB-035 which includes the requirements of MSB-034 making both MSB's mandatory as far as I can tell.
The manufacturer calls it mandatory to draw your attention to a safety issue and so that they can deny liability if you choose to ignore it.
Also, I have spoken to 2 aviation loss adjusters who both stated that not complying with a manufacturer's mandatory requirement could result in a refused insurance claim. Insurance companies will use any excuse to avoid a payout.