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Modification and Replacement Parts Association

Modification and Replacement Parts Association is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Modification and Replacement Parts Association rather than just read about it. In short: The Modification and Replacement Parts Association is the Washington, D.C.-based trade association that represents manufacturers of government-approved aftermarket aircraft parts. These aircraft parts are often known as PMA parts, from the acronym for Parts Manufacturer Approval.

Key takeaways

  • Modification and Replacement Parts Association belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Modification and Replacement Parts Association to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Modification and Replacement Parts Association from memory before moving on to harder problems.

Reference excerpt

The Modification and Replacement Parts Association is the Washington, D.C.-based trade association that represents manufacturers of government-approved aftermarket 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.

Membership

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

a design for an aircraft part that meets FAA safety requirements, and a quality assurance system that will assure that each part released from the system will meet the FAA-approved design. The manufacturers that meet these standards are issued Parts Manufacturer Approval (PMA) 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. The committee was originally formed by MARPA Director Josh Abelson, and since then has been chaired by Cori Ferguson of Alaska Airlines (2006–2008), David Linebaugh of Delta Air Lines (2008–2011), Steve Jones of American Airlines (2011–2013), William Barrett of American Airlines (2013), Edward Pozzi of United Airlines (2013–2014), Michael Rennick of Delta Air Lines (2014–2017), and is now co-chaired by Deidre Vance of American Airlines (2016–present) and Donald "Donny" Douglas of Delta Air Lines (2017–present). Air carriers engage in a complete engineering review of a PMA part before they choose to install it (despite the fact that 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.

History The industry that MARPA represents, PMA parts manufacturers, is not new. PMA parts have been around as commercial competitors since at least the 1950s. But the popularity of PMA parts has boomed since the turn of the millennium. 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. On May 18, 1998 they held a "MARPA Kick-off Meeting" at Fado Irish Pub on 7th St. in Washington, DC and signed, on a restaurant placemat, an agreement to form such a trade association. 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, D.C., in order to be closer to the decision-makers that affect MARPA's members. MARPA has had three presidents:

MARPA has had four chairmen of the board:

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. 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. For example, from 2009 through 2011, MARPA's president (Jason Dickstein) served on the FAA Aviation Rulemaking Committee (ARC) for Safety Management Systems (SMS), and MARPA played a significant role in helping to craft a version of the rule that would most effectively promote safety.

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). MARPA formed a committee of its members and drafted COS Guidance. 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 life cycle of the parts that the potential safety issue may not have even manifested itself. The data allows PMA companies to provide the same level of response and support to its customers that their competitors provide.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Modification and Replacement Parts Association

Start with the simplest possible case. Write down what Modification and Replacement Parts Association claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Modification and Replacement Parts Association before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Modification and Replacement Parts Association ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Modification and Replacement Parts Association

In research
Modification and Replacement Parts Association appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Modification and Replacement Parts Association in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Modification and Replacement Parts Association is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1999 establishments in Washington, D.C., Aerospace engineering organizations, American organizations established in 1999, so understanding it makes those chapters shorter.
In everyday life
Look for Modification and Replacement Parts Association outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Modification and Replacement Parts Association in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Modification and Replacement Parts Association means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Modification and Replacement Parts Association out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Modification and Replacement Parts Association in simple terms?

The Modification and Replacement Parts Association is the Washington, D.C.-based trade association that represents manufacturers of government-approved aftermarket aircraft parts. These aircraft parts are often known as PMA parts, from the acronym for Parts Manufacturer Approval.

Why does Modification and Replacement Parts Association matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Modification and Replacement Parts Association?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Modification and Replacement Parts Association.

Tags

  • 1999 establishments in Washington, D.C.
  • Aerospace engineering organizations
  • American organizations established in 1999
  • Organizations based in Washington, D.C.
  • Trade associations based in the United States

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