Subpart C. Subpart C—Strength Requirements

• General

  • SECTION § 27.301 - Loads.
  • SECTION § 27.303 - Factor of safety.
  • SECTION § 27.305 - Strength and deformation.
  • SECTION § 27.307 - Proof of structure.
  • SECTION § 27.309 - Design limitations.

• Flight Loads

  • SECTION § 27.321 - General.
  • SECTION § 27.337 - Limit maneuvering load factor.
  • SECTION § 27.339 - Resultant limit maneuvering loads.
  • SECTION § 27.341 - Gust loads.
  • SECTION § 27.351 - Yawing conditions.
  • SECTION § 27.361 - Engine torque.

• Control Surface and System Loads

  • SECTION § 27.391 - General.
  • SECTION § 27.395 - Control system.
  • SECTION § 27.397 - Limit pilot forces and torques.
  • SECTION § 27.399 - Dual control system.
  • SECTION § 27.411 - Ground clearance: tail rotor guard.
  • SECTION § 27.427 - Unsymmetrical loads.

• Ground Loads

  • SECTION § 27.471 - General.
  • SECTION § 27.473 - Ground loading conditions and assumptions.
  • SECTION § 27.475 - Tires and shock absorbers.
  • SECTION § 27.477 - Landing gear arrangement.
  • SECTION § 27.479 - Level landing conditions.
  • SECTION § 27.481 - Tail-down landing conditions.
  • SECTION § 27.483 - One-wheel landing conditions.
  • SECTION § 27.485 - Lateral drift landing conditions.
  • SECTION § 27.493 - Braked roll conditions.
  • SECTION § 27.497 - Ground loading conditions: landing gear with tail wheels.
  • SECTION § 27.501 - Ground loading conditions: landing gear with skids.
  • SECTION § 27.505 - Ski landing conditions.

• Water Loads

  • SECTION § 27.521 - Float landing conditions.

• Main Component Requirements

  • SECTION § 27.547 - Main rotor structure.
  • SECTION § 27.549 - Fuselage, landing gear, and rotor pylon structures.

• Emergency Landing Conditions

  • SECTION § 27.561 - General.
  • SECTION § 27.562 - Emergency landing dynamic conditions.
  • SECTION § 27.563 - Structural ditching provisions.

• Fatigue Evaluation

  • SECTION § 27.571 - Fatigue evaluation of flight structure.
  • SECTION § 27.573 - Damage Tolerance and Fatigue Evaluation of Composite Rotorcraft Structures.