14 CFR

What do Designated Engineering Representatives (DERs) primarily do under Part 183?

Approve design data in line with FAA standards

What distinguishes Special Federal Aviation Regulations (SFARs) from other parts of 14 CFR?

They are temporary and situation-specific.

What type of airworthiness is governed during ongoing maintenance after certification?

Recurrent

Under what regulation must a PMA part display "FAA-PMA" and its compatibility information?

Part 45

Which regulation governs the certification of products and articles such as TCs, STCs, and PMAs?

Part 21

How are design standards for aircraft engines formally tested under Part 33?

Block testing

What is the primary operational focus of Part 91 from a maintenance technician's perspective?

Recurrent airworthiness through Subpart E

In the certification system, which part primarily governs aircraft used in general aviation under 12,500 lbs?

Part 23

What does Title 14 CFR Part 3 formally define for the first time in regulatory language?

Airworthy

What is the purpose of Part 145 in the context of maintenance oversight?

Govern FAA repair station certification and operation

Which part requires aviation maintenance schools to meet minimum curriculum hours?

Part 147

Which part outlines requirements for aviation maintenance technician school curricula and hour requirements?

Part 147

What key relationship exists between Part 43 and Part 91?

Part 91 enforcement depends on Part 43 compliance.

Why does the FAA issue Airworthiness Directives (ADs) under Part 39?

To correct known unsafe conditions

Why did the FAA transition from using "FAR" to "14 CFR Part XX" when referencing regulations?

To distinguish from the Federal Acquisition Regulations under Title 48

How is Part 125 distinct from Part 121 or 135?

It governs operations of large, non-commercial aircraft.

What category of aircraft falls under Part 25?

Large transport aircraft

What does a "record" refer to under Part 3.5?

Any medium that preserves or conveys information

What distinguishes commuter and on-demand operations under Part 135?

Includes provisions for aging aircraft inspections

Why is Section 21.50 important in the context of maintenance regulations?

It requires Instructions for Continued Airworthiness.