Were to Log Prop Entries if No Prop Logbook

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AskBob
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Were to Log Prop Entries if No Prop Logbook

Good day. I am a licensed AME in Nigeria. In Nigeria, more as a carry-over from the British, we donot require dedicated logbooks for fixed-pitch propellers. Only constant speed props have logbooks. There is a confusion as to where to record details of work carried out on the fixed-pitch prop. Some say fixed-pitch prop work should be recorded in an engine logbook, whie others say it should be in the aircraft logbook.

Which do you think is most appropriate and what is the justification?

Thanks in advance for your answer.

Michael Chukwu

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AskBob
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Thank you for writing. I find this a most interesting question. I can see where this would create a great number of discussions.

My initial reaction is to say that the propeller would be covered in the airframe logbook as the airframe logbook encompasses the whole aircraft except for the engine. Case in point I can think of would be; I had to do a repair on a propeller spinner at one time. It was fiberglass and was damaged and I had to have it repaired. The spinner repair went into the airframe logbook. Also of cowing repair would go in the airframe logbook even though the cowing is around the engine. So I would tend to think that the fixed pitch propeller is not really part of the engine system but part of the aircraft system and would be in the airframe logbook.

bob.pasch
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Bob, the 5th Ammendment covers self-incrimination. You really did a repair to a spinner? Unless you have an FAA approved repair procedure [and there are very few], repairs to spinners are not authorized. The primary reason for that is that it induces an imbalance condition into the engine, prop and spinner's dynamic balance. Tisk, tisk... You are correct though about the documentation. Spinners asnd cowling are both airframe accessories.

Now, for your logbook question. The records for a fixed pitch prop still belong to THAT prop! Common practice is to document the Airframe log book [mx, overhaul etc.]. However, keep in mind that if that prop is removed for any reason, the prop mx data follows the prop. They are a permanent part of that component's historical records!

AskBob
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~1970 something and green and learning (or was it dumb and learning!)

I agree with your logbook comments. The twist on this is the question asker says that fixed pitch props do not have a log book. Never heard of that before. If removed I wounder if they use a JAA1 or 8130 or what to document its condition and history.

bob.pasch
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ALL props come with log books! They have to, they're Type Certificated Products. It seems though that the fixed pitch props are in the Rodney Dangerfield category and don't get enough respect. You know, the late, great Bill O'Brien once told me [paraphrased] I don't care if you make your entry on a piece of toilet paper and staple it between two brown paper bags-that's a log entry! And he's absolutely correct! It's not the wrapping that makes the statement, it's the contents inside...

Sandy Staszak (not verified)
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1970's vintage Cessna logbooks included one book
labeled "engine and propeller log"

n14ky
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Bob,
You're almost correct. Most spinners are part of the propeller and as such, an A&P isn't authorized to make repairs to them. However, lots of spinners on fixed pitch props are actually airframe components and as such they fall within the area that allows us to repair them so long as we have acceptable data for minor repairs or approved data for major repairs.

David Schober

bob.pasch
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Come on Dave... You, of all people and with your alphabet, should know better than that! I agree that some spinners are part of the prop assy and not airframe, usually on the larger constant speed props. But there are no repairs authorized on spinners, fixed pitch or constant speed-period!

n14ky
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Bob,
Are you telling me that you never riveted new angle clips on a Tri-Pacer or Cherokee 140 spinner? Yes repairs can be made to spinner, you just need the appropriate data.

David

bob.pasch
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Yes Dave, I did! In the early 80s... before I was educated!

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