Modification and Replacement Parts Association

Modification and Replacement Parts Association
This article is about the aircraft parts trade association. For the radar plotting aid see Mini Automatic Radar Plotting Aid.

The Modification and Replacement Parts Association is the Washington, D.C.-based trade association that represents manufacturers of government-approved after market aircraft parts. These aircraft parts are often known as PMA parts, from the acronym for Parts Manufacturer Approval. The manufacture of PMA parts is regulated in the United States by the Federal Aviation Administration.[1]



PMA parts manufacturers

MARPA's primary focus is on representing the needs of the PMA parts community in the United States. These companies manufacture after market aircraft parts under strict FAA guidelines.[2]

In order to obtain a PMA from the FAA, the manufacturer must demonstrate that it has

  1. a design for an aircraft part that meets FAA safety requirements, and
  2. a quality assurance system that will assure that each part released from the system will meet the FAA-approved design.[3]

The manufacturers that meet these standards are issued PMA, or Parts Manufacturer Approval, by the FAA.

Because the United States was the first nation to adopt rules permitting the manufacture of aircraft after market parts (and for many decades was the only nation with these rules), the PMA industry is primarily concentrated in the United States. Other countries have started to investigate and even adopt PMA rules. Some non-US manufacturers have started to investigate the benefits that MARPA can bring to them. In the future, MARPA's manufacturing membership may reflect a more international base.

Air carrier involvement

MARPA's members include many air carriers from around the world.

MARPA has an air carrier committee that remains quite active.[4] The committee was originally formed by MARPA Director Josh Abelson, and since then has been chaired by Cori Ferguson of Alaska Airlines (2006 - 2008) and David Linebaugh of Delta Air Lines (2008 - present). Air carriers engage in a complete engineering review of a PMA part before they choose to install it (despite the fact hat the FAA has already approved the part). Despite this engineering review (or perhaps because of it), air carriers have been adopting PMA usage in their fleets and recognizing reliability improvements and cost savings.[5]


The industry that MARPA represents, PMA parts manufacturers, is not new. PMA parts have been around as commercial competitors since at least the 1950s.[6] But the popularity of PMA parts has boomed since the turn of the millennium.[7]

MARPA was formed by George Powell, Jim Reum and Jason Dickstein. During the 1990s, the three men were members of the FAA Aviation Rulemaking Advisory Committee (ARAC) Part 21 Working Group, which was charged with developing updated manufacturing regulations. During their work on the working group.the three men came to understand the value of and need for a trade association to represent the interests of the PMA manufacturing community.

The Association spent its early years in the Phoenix, Arizona area under the guidance of George Powell and his wife Gloria Nations. In 2007, when Jason Dickstein became President, MARPA moved its headquarters to Washington, DC in order to be closer to the decision-makers that affect MARPA's members.[8]

MARPA has had three Presidents:

President Term of Office
George Powell (1999 - 2004)
Gloria Nations (2004 - 2007)
Jason Dickstein (2007 - present)

MARPA has had four Chairmen of the Board:

Chairman Term of Office
Jim Reum (1999 - 2004)
Patrick White (2004 - 2008)
Joshua Abelson (2008 - 2009)
John Hunter (2009 - present)

Government and industry affairs

MARPA keeps its members informed about changes in the regulations that affect them, and also informs them about proposed changes in order to permit them to file the comments with the government.[9] MARPA works with government agencies, like the FAA and EASA, to help promote aircraft parts safety. MARPA also works with the government agencies to help promote reasonable standards of commercial fairness in the industry. MARPA is a frequent contributor to the rule making process in the United States.[10] For example, from 2009 through 2011, MARPA's President (Jason Dickstein) served on the FAA Aviation Rulemaking Committee (ARC) for Safety Management Systems (SMS)[11], and MARPA played a significant role in helping to craft a version of the rule that would most effectively promote safety.[12]

Safety initiatives

MARPA also develops programs and tools to assist its members in regulatory compliance and in meeting their safety goals. In 2004, the FAA and PMA community discussed establishing new standards for Continued Operational Safety (COS).[13] MARPA formed a committee of its members and drafted COS Guidance.[14][15] The MARPA COS guidance represents a voluntary system under which PMA manufacturers track their parts through their entire life cycle in order to be able to collect reliability data. The purpose of the data is to support parts reliability - that will allow manufacturers to proactively respond to potential safety issues early enough in the lfe cycle of the parts that the potential safety issue may not have even manifested itself.[16] The data allows PMA companies to provide the same level of response and support to its customers that their competitors provide.[17]

Actions for PMA companies

MARPA has been recognized as a trade association committed to helping PMA companies to comply with FAA and other regulations.[18]

MARPA joined with the Air Transport Association in a letter to CFM International, asking them to rescind a series of advertisements that made unsupported claims.[19] Although CFM did not admit to MARPA's and ATA's claims, it did replace its factually-unsupported advertisements with ads that did not make the same allegations.

Fairness remained an issue as some of the larger manufacturers of aircraft products attempted to inhibit trade in PMAs by inaccurately claiming that PMA parts were not subject to the same Instructions for Continued Airworthiness as the parts that they replace.[20] MARPA continued to inform the industry and the government about these issues and in 2008, the FAA released a Special Airworthiness Information Bulletin to remind the industry that PMA parts are FAA-approved in the United States, and therefore PMA parts are valid replacement parts that continue to enjoy the same Instructions for Continued Airworthiness as the parts that they replace.[21] [22]

As an educator

MARPA has always had an education focus. MARPA has assisted its members in complying with the regulations and developing strategies to obtain PMAs.[23] It also educates the PMA community about the changing standards that apply to them through their website, a monthly newsletter, a blog, and an Annual Conference.

In addition to keeping the PMA industry informed about the changes that surround it, MARPA has also focused on educating PMA users (and potential users) about the benefits of using PMA parts.[24] MARPA's efforts to educate air carriers are credited with a significant decrease in the amount of time that an air carrier needs in order to review and approve a PMA part for use in their fleet. [25]

MARPA also supports member efforts to educate the public about PMA parts.[26]

Annual conference

MARPA holds an annual conference each year to share information about the rules that apply to PMA, changing legal standards that could influence PMA manufacturers, and industry conditions that affect PMA.[27] There usually one or more analysis of current aviation industry economic conditions and airline market conditions in order to facilitate industry strategic planning. [28] The Conference generally features significant participation by the FAA and other government entities (like EASA, U.S. Air Force, U.S. International Trade Administration, U.S. Justice Department , etc.), which makes it an important forum for exchanging information.

International focus

MARPA is based in the United States and mostly made up of US-based companies because the United States was the first country to have a body of regulations that supported government-approved manufacturing of aftermarket aircraft parts. Other countries have begun to investigated options to support such industries.

The European Aviation Safety Agency has issued a decision verifying that PMA parts from the United States are accepted and used in European Community member countries.[29] This decision followed a long-standing policy of the Joint Aviation Authorities (JAA). The tenets of European acceptance also exist in the bilateral agreements between the United States and a number of European nations.[30]

In 2010, MARPA appeared on a panel at the FAA / EASA International Safety Meeting.[31]. The panel also include Eurocopter and both FAA and EASA senior management. The purpose of the panel was to explore the safety paradigms that could be introduced to address the relationships between the aftermarket and the OEM market. MARPA's presentation focused on the Association's initiatives designed to provide a foundation for data gathering, data analysis, predictive risk management, and cooperative hazard mitigation.

MARPA's air carrier and maintenance facility members include a number of non-US parties.


  1. ^ 14 C.F.R. 21.303
  2. ^ FAA Order 8110.42C, Parts Manufacturer Approval Procedures, (June 23, 2008).
  3. ^ See FAA Order 8110.42C, Parts Manufacturer Approval Procedures, (June 23, 2008).
  4. ^ Cari Shane Parven, Product Focus: The Dawning of a New Era for PMA Parts<, Aviation Maintenance (April 1, 2007).
  5. ^ Id.
  6. ^ Cari Shane Parven, Product Focus: The Dawning of a New Era for PMA Parts, Aviation Maintenance (April 1, 2007).
  7. ^ Id.
  8. ^ MARPA Moves to Washington, Aviation Today (May 11, 2007).
  9. ^ FAA Issues New Guidance for PMA Holders, Aircraft International News (Sept 3, 2008).
  10. ^ MARPA's Mission, Aviation Week: MRO Blog (January 24, 2007) (noting that MARPA had filed 156 Federal Register Comments in the prior three years).
  11. ^ Summary of an Safety Management System Aviation Rulemaking Committee Meeting (November 16, 2010)
  12. ^ MARPA Comments on the Safety Management System Rulemaking Proposal (March 8, 2011)
  13. ^ Matt Thurber, PMA Industry Facing Maturity Challenge, Aviation Maintenance (March 1, 2005).
  14. ^ Positive COS and Effect for PMAs, Aviation Maintenance, Vicki McConnell, Technology Editor (March 6, 2008)
  15. ^ Matt Thurber, PMA Industry Facing Maturity Challenge, Aviation Maintenance (March 1, 2005) (noting the Committee leadership).
  16. ^ MARPA's Guidance Material for a PMA Continued Operational Safety (COS) System (Revision One - September 17, 2007).
  17. ^ Matt Thurber, PMA Industry Facing Maturity Challenge, Aviation Maintenance (March 1, 2005).
  18. ^ Michelle Gardner, Parts Manufacturing Approval: Negotiating Through the PMA Process can be Daunting but Help is Available, Aircraft Maintenance Technology (October, 2004).
  19. ^ MARPA Refutes CFM International's Inflammatory Claims That Competitors Replacement Aircraft Products Are Inferior, AMT Online (July 2008).
  20. ^ See The MARPA Report: PMA Makes Great Strides for an Industry in Need, Aviation Maintenance (Jan 1, 2008).
  21. ^ Anti-PMA Rhetoric is Wrong; PMA Parts are Valid, Says FAA, AMT Online (August 2008).
  22. ^ Dionne Shearer, PMA Parts Prevail, Aircraft Maintenance Technology (September 22, 2008).
  23. ^ Michelle Gardner, Parts Manufacturing Approval: Negotiating through the PMA process can be daunting but help is available, Aircraft Maintenance Technology (October 2004).
  24. ^ The MARPA Report: PMA Makes Great Strides for an Industry in Need, Aviation Maintenance (Jan 1, 2008).
  25. ^ Cari Shane Parven, Product Focus: The Dawning of a New Era for PMA Parts, Aviation Maintenance (April 1, 2007).
  26. ^ Wencor Wins MARPA Award, Wencor Press Release (October 26, 2005) (Wencor won the award for its efforts to educate the Asian marketplace about the value of PMA parts).
  27. ^ E.g. Matt Thurber, "PMA Industry To Convene at MARPA Conference," Aviation International News (September 1, 2010)
  28. ^ E.g. Tom Tran (Aerostrategy), "PMA Market Outlook: Impact of the Recession," (September 30, 2009)
  29. ^ European Aviation Safety Agency Decision No. 2007/003/C (16 July 2007) ("On the Acceptance of Certification Findings made by the Federal Aviation Administration of the United States of America (FAA) for Parts Designed in the United States of America under the Part Manufacturer Approval (PMA) System of the FAA").
  30. ^ See, e.g., Bilateral Aviation Safety Agreement - Implementation Procedures for Design Approval, Production Activities, Export Airworthiness Approval, Post Design Approval Activities, and Technical Assistance Between Authorities, sec. (August 24, 2001) (Agreement between the United States and France) (revised June 2008).
  31. ^ 2010 FAA / EASA International Safety Meeting website

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