Using PMA parts for specific aircraft 1

[heinessen]

Hello.

I am an engineer in MRO and would like to know about using PMA part in our customer's aircraft.
One of PMA parts manufacturer suggested us to use PMA to cut price for maintenance and our customer also accepted to use it.
But I am not sure if we could just use PMA parts although we could not find aircraft effectivity (MSN or Reg.No) in document provided from PMA parts manufacturer.
Generally, if someone want to use new parts which replaces existing part, then approved engineering data such as SB or FAA 8110-3 for installation on specific aircraft is required (new part should have 8130-3), but I am not sure similar process is required in PMA part using process as well.
The document from PMA part manufacturer only shows aircraft model as eligibility. (not a specific aircraft MSN no or Reg.No).
To make short, I would like to know if adding aircraft effectivity in any technical document and making it approved by FAA is required to use PMA part to replace existing parts in aircraft.

Thanks.

 

[der8110]

No further approval would be needed to install a PMA part on any particular serial number of a model listed for the PMA.

To install a PMA'd part on a model NOT listed, then yes, installation data and an approval for it would be needed. But at least manufacturing approval for the part is taken care of.

If there are any differences due to serial number effectivities within a particular model, the PMA documentation will address that. Usually. Most modern PMA Supplements are pretty good, but there's some older PMA's out there that can be vague - which can go either way, help or hurt.

 

[MNLiaison]

Caution:
The PMA part may be acceptable and approved by the FAA for installation on a specific model but that does not authorize the MRO to install it on an aircraft they do not own and operate. The customer may have a policy that restricts PMA parts on their aircraft for various reasons. You need to speak with and get the customers specific approval via their method for alternate part installation. You may find each customer has a very different process and policy on PMA parts installation.

 

[rb1957]

A PMA is an approval that says "this part is as good as the OEM's". As such it can be installed on any suitable a/c. The a/c's logbook would record the removal of the OEM part "for cause" and the replacement with PMA part.

another day in paradise, or is paradise one day closer ?

 

[SAITAETGrad]

To make short, I would like to know if adding aircraft effectivity in any technical document and making it approved by FAA is required to use PMA part to replace existing parts in aircraft.

Yes. The approval document and in some cases its referenced children will define applicability. There should never be a broken link from the approval document.

You said the PMA certificate states the model. If that's all it says, then all of that model are applicable.

The approval document will fully define the limitations. But they don't all follow the same standard recipe. Read and understand the document.

 

[rb1957]

you'll know the answer as these guys prepare their PMA document. Maybe they'll ask for a serial number (where it's strictly required or not, sometimes STCs include s/n), maybe they'll just ask for the model. the point is that the PMA part is as good as the OEM part … the FAA is saying so with the PMA.

another day in paradise, or is paradise one day closer ?