Data Tag = Airworthiness

Tom-D

Member
Can a 0-235 Lycoming be airworthy with out a data tag?

Far 45 (b) Aircraft engines . A manufacturer of an aircraft engine produced under a type certificate or production certificate must mark each engine by attaching a fireproof identification plate. Such plate—

(1) Must include the information specified in §45.13 using an approved method of fireproof marking;

(2) Must be affixed to the engine at an accessible location; and

(3) Must be secured in such a manner that it will not likely be defaced or removed during normal service, or lost or destroyed in an accident.

--------------------------------------------------------------------------

If the data tag was removed after installation of the engine in the aircraft, is it still airworthy?

From http://www.sacskyranch.com/lycoming.htm

What is a wide-deck and narrow-deck engine

For many Lycoming engines the same engine model may be a narrow deck or a wide deck. Each engine takes entirely different parts. How do you tell the difference. All wide deck engines have a engine serial number ending in A (except O-235 series engines). Lycoming serial numbers can be found on the engine data plate and also on the crankcase at the top parting surface.

Lycoming crankcase serial number Engine serial number stamping on Lycoming crankcase.

WE know the S/N and we have logs. but no data tag.
 
Far 45 (b) Aircraft engines . A manufacturer of an aircraft engine produced under a type certificate or production certificate must mark each engine by attaching a fireproof identification plate. Such plate—

(1) Must include the information specified in §45.13 using an approved method of fireproof marking;

(2) Must be affixed to the engine at an accessible location; and

(3) Must be secured in such a manner that it will not likely be defaced or removed during normal service, or lost or destroyed in an accident.

--------------------------------------------------------------------------

If the data tag was removed after installation of the engine in the aircraft, is it still airworthy?
The above quoted regulation appears to be a dictate ONLY to the manufacturer: "A MANUFACTURER [...] MUST [....]"

It does not impose anything on any subsequent entity. While there may be regulations elsewhere that require owners or operators to maintain the identification plate in a readable state, I can't see any way the quoted regulation could be read as requiring that.
 
The above quoted regulation appears to be a dictate ONLY to the manufacturer: "A MANUFACTURER [...] MUST [....]"

It does not impose anything on any subsequent entity. While there may be regulations elsewhere that require owners or operators to maintain the identification plate in a readable state, I can't see any way the quoted regulation could be read as requiring that.
Did a quick check and section 45.13(b) dictates that no one else may change or remove the identification information.
 
Tom-D said:
You have the logs in one hand and look at the engine with no data tag, how do you prove that the two belong to each other?

How do I as an A&P-IA know there are not two engines out there with this S/N?
You need to read this FAA advisory circular, which is directly pertinent to your situation:

http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC 43-213.pdf

One extracted quotes:

"Part marking is not essential for determining the continued airworthiness of an in-service article, provided the operator and/or its maintenance provider can determine that it conforms to its approved design and is in condition for safe operation."
 
Back
Top