PLT113: Airworthiness Categories and Limits
What code PLT113 covers, why the FAA tests it, and how to study Airworthiness Categories and Limits before your checkride.
Recall aircraft design - categories / limitation factors
What this means for your checkride
Airworthiness categories set the load limits an airplane is certificated for: normal category to +3.8/-1.52 G, utility to +4.4 G for limited maneuvers, and acrobatic to +6.0 G. Exceeding the limit load factor risks permanent deformation; the ultimate load factor is where structural failure is expected.
The category defines what maneuvers and loads are legal and safe, so the FAA tests the G limits and what each category permits.
Pilots think the limit load factor is where the airplane breaks. It is where permanent deformation begins; the structure is built to a higher ultimate load, but you never plan to use that margin.
Where to study it
A code on your test report is an area of deficiency. An authorized instructor must review it with you and endorse that review before you take the practical test, and the examiner may revisit it during the oral. Study it until you can explain it out loud, not just recognize the answer.