# Presentation: 211957

## Parts Production Approvals by Peter Pupator, Anchorage ACOMike Heusser, Anchorage ACO Mark Wilson, Alaska FSRO forPublic Training / IA, March 30, 2004Anchorage Alaska

- _Parts Production Approvals_ by Peter Pupator, Anchorage ACOMike Heusser, Anchorage ACO Mark Wilson, Alaska FSRO forPublic Training / IA, March 30, 2004Anchorage Alaska

- Public / IA Training, March 2004

## Manufacturer

- Owner / Operator

- Parts Manufacturer _advertises and sells_  for installation on Certified Products.
- 14 CFR Part 21.303

- AircraftOwner/Operator _purchases_ parts for installation on a Certified Product.
- 14 CFR Part 21.305

- Parts Flow

- Intent

- Public / IA Training, March 2004

## Notes for Discussion;

_**Design **_approval  (FAA Approved);This is approval of the design (drawings, process etc) that show compliance with the regulations.	-**L**etter **D**esign **A**pproval (LDA)	-**S**upplemental **T**ype **C**ertificate (STC)	-**D**esignated **E**ngineering **R**epresentative (DER via 8110-3)	-FAA Form 337 block 3	-SFAR 36, Part 145 Repair Station	-Other methods as agreed to by the administrator

**2)**	_**Production**_ approval   (FAA Approved);This is approval of the production system which ensures that the finished product meets the approved design.Quality system, conformity.

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)(ref. FAA Order 8110.42)

- Types of PMAs;  - _**Modification**_ Parts (changes the fit / form / function)  - _**Replacement**_ Parts (retains the fit / form / function) - For _modification_ parts *(that are *_*Major*_* changes to Type Design 21.93(a))* then an _STC_ must be issued by the ACO.- For _modification_ parts *(that are *_*Minor*_* changes to Type Design 21.93(a))* an _LDA_ may be issued by the ACO. - For _replacement_ parts a PMA may be issued in three (3) basic categories; 	1) Test and Computation – via LDA 	2) Identicality – via LDA	3) Licensing Agreement (based on approved data, STC, TC) – via a legal document.

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)

- Per 14 CFR 23.303(h) the holder of a PMA shall establish a **F**abrication **I**nspection **S**ystem (FIS).  This is a Quality Control system to ensure quality proper parts.   PMA may not be transferred.  If PMA facility moves the Administrator must be notified.  PMA holder shall determine that the final product conforms to the approved design data and is safe for installation.  PMA is issued by FAA MIDO Branch (Wichita MIDO)  PMA required engineering (LDA) data. (ie. Control specification drawings)

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)marking

- 14 CFR Part 45.15   Replacement and modification parts.
**FAA-PMA**
**Name, Trademark, or Symbol**
**Part Number**
**Name and Model Designation**.

- Parts Manufacturing Approval (PMA)marking

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)LDA examples

**Test and Computation**:  Individual want to sell _replacement fuel pump_ for installation on a PA-28._Option 1:_ • Take original (Piper) fuel pump and determine pressure versus flow rate (by test).  • Take replacement fuel pump and determine pressure versus flow rate (by test). • Compare original and replacement data, to show that the replacement meets or exceeds original. • Determine tolerances in OEM product. _Option 2:_ • Take replacement fuel pump and show by test that it supplies the fuel flow required by the engine x (125%) per Engine TCDS (Installation Instruction)_Both Option 1 and 2 require;_• FAA ACO Approved Test Plan prior to testing. • Properly witnessed tests (DER or FAA)• Development of control specs for pumps (drawings and QC procedures)

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)examples

**(b) Identicality:**  Individual wants to sell _replacement baffles_ for installation on PA-18._Option 1:_• obtained the Piper PA-18 baffle drawings, which state dimensions and material.• duplicates the _critical_ specifications (dimensions/material/process) in form of their specification.. _Option 2:_• copy a set of PA-18 baffles for pattern and final shape.  • Determine material type by taking sample of (Piper)  baffle and sending to a laboratory for tests.

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)examples

**(c) Test and Computation**:  Individual wants to sell replacement _Landing Gear_ (steel spring) for installation on C175 .• obtains a OEM Cessna C175 gear leg.• tests gear to the limit, ultimate strength and associated stiffness (load versus deflection) to show it is as strong and has same spring rate as OEM gear.• FAA ACO Approved Test Plan prior to testing. • Properly witnessed tests (DER or FAA)• Development of control specs for pumps (drawings and QC procedures) Submits data to FAA ACO for Test a& Computation  PMA.

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)examples

**(d) **Individual wants to supply replacement _Alternator Belts_ for engine(s).• Obtains a belt from aircraft (OEM) for installation on IO-360 engine.  Determines that the OEM has purchased another product (e.g.. automotive alternator belt) and placed their part number over the old (automotive) p/n• the individual has two choices.	1) Show that the automotive belt part number is unaltered by aircraft OEM and then use that p/n as the basis for an _IDENTICALITY_ finding	2) Obtain the specification of the automotive belt p/n and find another belt that equal for an _TEST & COMPUTATION_ finding.

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)examples

**(e)** **Licensing Agreement**:  Individual wants to supply spare/replacement landing gear axles for DC-6 aircraft.• obtains a Licensing Agreement (legal document) from Boeing (Douglas) to manufacture part number.• gets associated drawing and specification released. • Boeing is responsible for ALL design changes to product.

- Public / IA Training, March 2004

## Parts Manufacturing Approval (PMA)Closing thoughts.

- A PMA is nothing more then a way of specifying and ensuring quality of parts.  It requires engineering, manufacturing and quality control.A PMA can be obtained on part for sale to the public WITHOUT an STC!A PMA still project must still have a project plan that the FAA agrees is valid (method and schedule).A PMA can be cumbersome to sustain.A PMA is issued by the Manufacturing Inspection District Office (MIDO).  For ALL Alaska manufacturers that office is in Wichita (see last page)The Anchorage ACO has generic copies of FIS for your use.

- Public / IA Training, March 2004

## Owner or Operator produced parts 

- Owner or Operator produced parts

**Per 14 CFR 21.303(b)(2)**Parts for installation fabricated  the owner or operator of that aircraft. (AC 20-62D)Owner / Operator must participate in controlling the design, manufacture, or quality of the part.-Supervising the manufacture-Providing the design data, materials, or quality of part.-Requires Design approval (8110-3, 337, STC)-Installation of On-Demand parts as defined by an STC.-Purchase and installation of components on aircraft.	* radios, alternator, belts, other equipment or parts as is appropriate.

- Public / IA Training, March 2004

## Owner Produced Parts examples

**Fred is putting his PA-12 on floats.**Fred has an approved Piper specification (drawing, SB etc) for a float installation, that specifies the dimensions, material of a fitting and correct manner in which to mount the fitting on the fuselage.Fred can instruct a machine shop to build this part to the aforementioned specification.OWNER PRODUCED PART.Minor design change, minor alteration, (A/P) log book entry!

- Public / IA Training, March 2004

## Owner Produced Parts examples

**Jane is installing a oil cooler STC on her C185.**Jane has the (design) data from the STC holder in the form of drawings and installation instruction.Jane has an I/A do the installation and fill out a FAA Form 337.OWNER PRODUCED PART.Who takes responsibility for the part?Minor design change, minor alteration, (A/P) log book entry!

- Public / IA Training, March 2004

## Type of Product Approvals

| Type of Approval | Regulator Basis14 CFR Part 21 | Sell to Public | Install on my airplane | Design Approval Basis |
| --- | --- | --- | --- | --- |
| Parts Manufacturing Approval (PMA) | Subpart K21.303(d)(e)(f)(g)(h)(I)(j) | 
YES | 
YES | LDA
STC |
| Aircraft Owner Produced Parts | Subpart K 
21.303(b)(2) | 
NO | 
YES | LDA,
STC, 337 |
| Aircraft Owner Installed Equipment | Subpart K 
21.305(d) | 
-N/A- | 
YES | PMA, TSO, LDA
STC or
337 |
| Production under TC / APIS | Subpart F
 | YES | YES | TCDS
STC |
| Production 
Certificate (PC) | Subpart G | YES | YES | TCDS |
| TSO | Subpart O | YES | -N/A- | TSO Design Letter |

- Public / IA Training, March 2004

## Helpful web links for Production information

- _[http://www.quality-control-plan.com/pdf/faa-pma.pdf](http://www.quality-control-plan.com/pdf/faa-pma.pdf)_
- _[http://www.bookfinder.com/dir/i/FAA-PMA-The_Parts_Manufacturers_Approval_Process/0768000513/](http://www.bookfinder.com/dir/i/FAA-PMA-The_Parts_Manufacturers_Approval_Process/0768000513/)_
- _[http://www.quality-control-plan.com/faa-quality-manual.htm](http://www.quality-control-plan.com/faa-quality-manual.htm)_
- Wichita Manufacturing Inspection District Office
- Mid-Continent Airport
- 1804 Airport Road, Room 101
- Wichita KS, 67209
- FAX: 316-946-4189
- Manager: Clem Figueroa  316 946-4178

- Public / IA Training, March 2004