serviceable parts from U/S engine

[davor_k]

I would like to ask what are the conditions of issue EASA Form 1 for parts removed as serviceable from unserviceable engine which is off wing? Of course the removed parts weren't the root cause of engine failure. What details should be known and what tests/ inspections need to be done to treat the parts as serviceable?

Thank you for help in advance.

[Engineer_aus]

All depends if it is in the companies manual or not.

[winglit]

That's an interesting question. If the part was to stay within the company, then the engineer who removed the part off the U/S engine could sign the tag to certify that it was removed as serviceable. It would then go through the stores system who would issue it with a batch or GRN number. That would allow it to be fitted to the same company aircraft. Similar to a Rob situation.

I don't know how the Form 1 is issued so it would be interesting to hear how that's done.

[davor_k]

Engineer_aus - we do not have the procedure in Company Manual but we would like to develope this kind of procedure that's why I asked for advice.

Winglit our company is third party (not an Operator) and it is not possible for us working based on "tag" system.

Could anyone advise?

[jxk]

I would suspect that the part would have to be tested to its specification by a suitably qualified person before a Form 1 could be issued.

[Engineer_aus]

No procedure, pull the part and send it off to the repair shop for test/evaluation. Get your Form 1 that way. You can always write on the u/s tag removed serviceable so it is a mere paperwork exercise.

[Chris P Bacon]

You must also be aware of any overhaul life limits. Say for example you remove a part from a turbine module, which has a 3500 hour TBO, the removed part has that TBO also.
If the part has run 3400 hours and you fit it to a turbine which has run 1000 hours since overhaul, the part will over-run its TBO if left installed for more than 100 hours.
If we are to swap parts between engines, we overhaul inspect them, tag them and they can be used on any other engine.

[grounded27]

Winglit our company is third party (not an Operator) and it is not possible for us working based on "tag" system.Being third party there is no procedure. If an operator removes an engine they commonly swap gearbox components from the U/S engine to the new/overhauled one. The airline has it's procedures for parts tracking, foreign or domestic it is their responsibility.

Being third party you should be able to go to your CAA (assuming you have some sort of repair station license) and create a removed serviceable tag approved to add to your operating manual. It is though only for your purpose of identifying parts at your facility and showing the airline/operator that you have parts control.

Simple answer is NO, you can not make a part serviceable unless you are licensed to overhaul that part.

[barit1]

Sometimes for fault isolation it is convenient to swap LH<->RH components - bleed valves, igniter components, etc.

After the fault is determined, the "good" component can be restored to its original engine, and the identified faulty one replaced with a serviceable one from stores. Or at least that was the practice on one ramp I've worked.

[grounded27]

There is something to be said about a "known good" component for T/S, not just one with a serviceable tag. A part that is tagged serviceable is sort of like a prostitute telling you she is a virgin.

[TinyTim2]

A bit more like a prostitute telling you she hasn't got crabs !