Question for regulation boffins!

[c130jage]

I work for a large european aircraft manufacturer (part 145 organisation) and we are having some lively debate on regulations

If I recieve an assembly, for instance a brake maniolfd from a manufacturer with its corresponding EASA form 1

I then fit said assy onto an aircraft and find that a componant malfunctions, lets say a servo valve. I then trouble shoot and diagnose a faulty servo valve on said assy.

If I change that componant, do I then invalidate the EASA form 1, requiring the assy to be replaced?

Please bear in mid that this is not part 21 organisation further the aircraft maintenance manual lists the componant as a replacable part with a procedure to do so.

[TURIN]

I would say the point is moot.

Once the assy is fitted to the a/c the EASA Form 1 has been used and filed.
If there is an approved procedure to replace a component then that becomes the authority for certification.



I think.

[c130jage]

So to further my question:-

For me, if I diagnose the componant faulty and request the assy manufacturer (issuer of EASA F1) replace that componant IAW CMM, then surely I do not devalidate the EASA form 1 ????

[KriVa]

As far as I know, if the assy is on your capability list, it shouldn't be a problem to replace part of it.
If not, you'll have to replace the entire assembly.

In any case, that's how I understand it, but I might be wrong, of course.

[Wodrick]

In my view, using the example given, if the Servo Valve is listed as a replaceable unit, with an AMM procedure for doing so, then it is replaceable IAW AMM no problem.