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  2. CFR & AIM
  3. CFR
  4. Part 121
  5. Appendix K
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14 CFR Part 121
  1. Subpart A: General
  2. Subpart B—Certification Rules for Domestic and Flag Air Carriers [Reserved]
  3. Subpart C—Certification Rules for Supplemental Air Carriers and Commercial Operators [Reserved]
  4. Subpart D—Rules Governing All Certificate Holders Under This Part [Reserved]
  5. Subpart E: Approval of Routes: Domestic and Flag Operations
  6. Subpart F: Approval of Areas and Routes for Supplemental Operations
  7. Subpart G: Manual Requirements
  8. Subpart H: Aircraft Requirements
  9. Subpart I: Airplane Performance Operating Limitations
  10. Subpart J: Special Airworthiness Requirements
  11. Subpart K: Instrument and Equipment Requirements
  12. Subpart L: Maintenance, Preventive Maintenance, and Alterations
  13. Subpart M: Airman and Crewmember Requirements
  14. Subpart N: Training Program
  15. Subpart O: Crewmember Qualifications
  16. Subpart P: Aircraft Dispatcher Qualifications and Duty Time
  17. Subpart Q: Flight Time Limitations and Rest Requirements: Domestic Operations
  18. Subpart R: Flight Time Limitations: Flag Operations
  19. Subpart S: Flight Time Limitations: Supplemental Operations
  20. Subpart T: Flight Operations
  21. Subpart U: Dispatching and Flight Release Rules
  22. Subpart V: Records and Reports
  23. Subpart W: Crewmember Certificate: International
  24. Subpart X: Emergency Medical Equipment and Training
  25. Subpart Y: Advanced Qualification Program
  26. Subpart Z: Hazardous Materials Training Program
  27. Subpart AA: Continued Airworthiness and Safety Improvements
  28. Subpart BB [Reserved]
  29. §§ 121.1200-121.1399 [Reserved]
  30. Subpart CC [Reserved]
  31. §§ 121.1400-121.1499 [Reserved]
  32. Subpart DD: Special Federal Aviation Regulations
  33. Appendices

    Appendix A to Part 121: First Aid Kits and Emergency Medical Kits
  34. Appendix B to Part 121: Airplane Flight Recorder Specification
  35. Appendix C to Part 121: C-46 Nontransport Category Airplanes
  36. Appendix D to Part 121: Criteria for Demonstration of Emergency Evacuation Procedures Under § 121.291
  37. Appendix E to Part 121: Flight Training Requirements
  38. Appendix F to Part 121: Proficiency Check Requirements
  39. Appendix G to Part 121: Doppler Radar and Inertial Navigation System (INS): Request for Evaluation; Equipment and Equipment Installation; Training Program; Equipment Accuracy and Reliability; Evaluation Program
  40. Appendix H to Part 121: Advanced Simulation
  41. Appendixes I-J to Part 121 [Reserved]
  42. Appendix K to Part 121: Performance Requirements for Certain Turbopropeller Powered Airplanes
    1. Appendix K to Part 121 Performance Requirements for Certain Turbopropeller Powered Airplanes
    2. Performance
  43. Appendix L to Part 121: Type Certification Regulations Made Previously Effective
  44. Appendix M to Part 121: Airplane Flight Recorder Specifications
  45. Appendix N to Part 121 [Reserved]
  46. Appendix O to Part 121: Hazardous Materials Training Requirements For Certificate Holders
  47. Appendix P to Part 121: Requirements for ETOPS and Polar Operations

14 CFR Part 121|eCFR Sep 29, 2026

Appendix K to Part 121

Performance Requirements for Certain Turbopropeller Powered Airplanes

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1. Applicability. This appendix specifies requirements for the following turbopropeller powered airplanes that must comply with the Airplane Performance Operating Limitations in §§ 121.189 through 121.197:

a. After December 20, 2010, each airplane manufactured before March 20, 1997 and type certificated in the:

i. Normal category before July 1, 1970, and meets special conditions issued by the Administrator for airplanes intended for use in operations under part 135 of this chapter.

ii. Normal category before July 19, 1970, and meets the additional airworthiness standards in SFAR No. 23 of 14 CFR part 23.

iii. Normal category, and complies with the additional airworthiness standards in appendix A of part 135 of this chapter.

iv. Normal category, and complies with section 1.(a) or 1.(b) of SFAR No. 41 of 14 CFR part 21.

b. After March 20, 1997, each airplane:

i. Type certificated prior to March 29, 1995, in the commuter category.

ii. Manufactured on or after March 20, 1997, and that was type certificated in the normal category, and complies with the requirements described in paragraphs 1.a.i through iii of this appendix.

2. Background. Sections 121.157 and 121.173(b) require that the airplanes operated under this part and described in paragraph 1 of this appendix, comply with the Airplane Performance Operating Limitations in §§ 121.189 through 121.197. Airplanes described in § 121.157(f) and paragraph 1.a of this appendix must comply on and after December 20, 2010. Airplanes described in § 121.157(e) and paragraph 1.b of this appendix must comply on and after March 20, 1997. (Airplanes type certificated in the normal category, and in accordance with SFAR No. 41 of 14 CFR part 21, as described in paragraph 1.a.iv of this appendix, may not be produced after October 17, 1991.)

3. References. Unless otherwise specified, references in this appendix to sections of part 23 of this chapter are to those sections of 14 CFR part 23, as amended by Amendment No. 23-45 (August 6, 1993, 58 FR 42156).

Performance

4. Interim Airplane Performance Operating Limitations.

a. Until December 20, 2010, airplanes described in paragraph 1.a of this appendix may continue to comply with the requirements in subpart I of part 135 and § 135.181(a)(2) of this chapter that apply to small, nontransport category airplanes.

b. Until March 20, 1997, airplanes described in paragraph 1.b.i of this appendix may continue to comply with the requirements in subpart I of part 135 of this chapter that apply to commuter category airplanes.

5. Final Airplane Performance Operating Limitations.

a. Through an amended type certification program or a supplemental type certification program, each airplane described in paragraph 1.a and 1.b.ii of this appendix must be shown to comply with the commuter category performance requirements specified in this appendix, which are included in part 23 of this chapter. Each new revision to a current airplane performance operating limitation for an airplane that is or has been demonstrated to comply, must also be approved by the Administrator. An airplane approved to the requirements of section 1.(b) of SFAR No. 41 of 14 CFR part 21, as described in paragraph 1.a.iv of this appendix, and that has been demonstrated to comply with the additional requirements of section 4.(c) of SFAR No. 41 of 14 CFR part 21 and International Civil Aviation Organization Annex 8 (available from the FAA, 800 Independence Avenue SW., Washington, DC 20591), will be considered to be in compliance with the commuter category performance requirements.

b. Each turbopropeller powered airplane subject to this appendix must be demonstrated to comply with the airplane performance operating limitation requirements of this chapter specified as follows:

i. Section 23.45 Performance General.

ii. Section 23.51 Takeoff.

iii. Section 23.53 Takeoff speeds.

iv. Section 23.55 Accelerate stop distance.

v. Section 23.57 Takeoff path.

vi. Section 23.59 Takeoff distance and takeoff run.

vii. Section 23.61 Takeoff flight path.

viii. Section 23.65 Climb: All engines operating.

ix. Section 23.67 Climb: one engine inoperative.

x. Section 23.75 Landing.

xi. Section 23.77 Balked landing.

xii. Sections 23.1581 through 23.1589 Airplane flight manual and approved manual material.

6. Operation. After compliance with the final airplane performance operating limitations requirements has been demonstrated and added to the Airplane Flight Manual performance data of the affected airplane, that airplane must be operated in accordance with the performance limitations of §§ 121.189 through 121.197.

Regulations Referenced Outside This Appendix

14 CFR 121.18914 CFR 121.19714 CFR Part 13514 CFR Part 2314 CFR Part 135, Appendix A14 CFR Part 2114 CFR 121.15714 CFR 121.17314 CFR 135.181
Previous AppendixAppendix H to Part 121: Advanced SimulationNext Appendix Appendix L to Part 121: Type Certification Regulations Made Previously Effective

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Appendix K to Part 121 Performance Requirements for Certain Turbopropeller Powered Airplanes

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