×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Using PMA parts for specific aircraft

Using PMA parts for specific aircraft

Using PMA parts for specific aircraft

(OP)
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.

RE: Using PMA parts for specific aircraft

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.

RE: Using PMA parts for specific aircraft

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.

RE: Using PMA parts for specific aircraft

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 ?

RE: Using PMA parts for specific aircraft

Quote (heinessen OP)

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.

RE: Using PMA parts for specific aircraft

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 ?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close