The Small Business
Rule Change Brief

Rule lifecycle · RIN:2120-AA64

Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines

Transportation Department, Federal Aviation Administration — observed across 55 documents over 31 days.

First seen

Apr 21, 2026

Last seen

May 22, 2026

Latest stage

Rule

PRORULE → RULE

0d

Effective on

Friday, June 26, 2026

Stage timeline

1. Final·Apr 21, 2026·91 FR 21245

   Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

   effective May 26, 2026#2026-07736

2. Proposed·Apr 21, 2026·91 FR 21269

   Airworthiness Directives; Various Helicopters

   comments close Jun 5, 2026#2026-07720

3. Final·Apr 22, 2026·91 FR 21373

   Airworthiness Directives; The Boeing Company Airplanes

   effective May 7, 2026comments close Jun 8, 2026#2026-07808

4. Proposed·Apr 23, 2026·91 FR 21741

   Airworthiness Directives; Bell Textron Canada Limited Helicopters

   comments close Jun 8, 2026#2026-07935

5. Proposed·Apr 23, 2026·91 FR 21747

   Airworthiness Directives; Bombardier, Inc., Airplanes

   comments close Jun 8, 2026#2026-07881

6. Proposed·Apr 23, 2026·91 FR 21744

   Airworthiness Directives; The Boeing Company Airplanes

   comments close Jun 8, 2026#2026-07931

7. Proposed·Apr 23, 2026·91 FR 21738

   Airworthiness Directives; Various Helicopters

   comments close Jun 8, 2026#2026-07937

8. Final·Apr 24, 2026·91 FR 21950

   Airworthiness Directives; Bombardier, Inc., Airplanes

   effective May 29, 2026#2026-08032

9. Final·Apr 24, 2026·91 FR 21945

   Airworthiness Directives; Pratt & Whitney Engines

   effective May 29, 2026#2026-08106

10. Proposed·Apr 27, 2026·91 FR 22485

    Airworthiness Directives; The Boeing Company Airplanes

    comments close Jun 11, 2026#2026-08154

11. Final·Apr 28, 2026·91 FR 22710

    Airworthiness Directives; Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca, S.A.) Engines

    effective Jun 2, 2026#2026-08225

12. Final·Apr 29, 2026·91 FR 23001

    Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes

    effective Jun 3, 2026#2026-08305

13. Final·Apr 29, 2026·91 FR 22995

    Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

    effective May 14, 2026comments close Jun 15, 2026#2026-08324

14. Final·Apr 29, 2026·91 FR 23009

    Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

    effective Jun 3, 2026#2026-08303

15. Final·Apr 29, 2026·91 FR 22998

    Airworthiness Directives; The Boeing Company Airplanes

    effective Jun 3, 2026#2026-08304

16. Final·Apr 29, 2026·91 FR 23005

    Airworthiness Directives; The Boeing Company Airplanes

    effective Jun 3, 2026#2026-08306

17. Proposed·Apr 29, 2026·91 FR 23034

    Airworthiness Directives; Airbus SAS Airplanes

    comments close Jun 15, 2026#2026-08289

18. Proposed·Apr 29, 2026·91 FR 23025

    Airworthiness Directives; Airbus SAS Airplanes

    comments close Jun 15, 2026#2026-08290

19. Proposed·Apr 29, 2026·91 FR 23028

    Airworthiness Directives; Bombardier, Inc., Airplanes

    comments close Jun 15, 2026#2026-08291

20. Proposed·Apr 29, 2026·91 FR 23031

    Airworthiness Directives; Leonardo S.p.a. Helicopters

    comments close Jun 15, 2026#2026-08316

21. Proposed·Apr 29, 2026·91 FR 23023

    Airworthiness Directives; Textron Aviation Inc. Airplanes

    comments close Jun 15, 2026#2026-08322

22. Proposed·Apr 30, 2026·91 FR 23185

    Airworthiness Directives; The Boeing Company Airplanes

    comments close Jun 15, 2026#2026-08385

23. Proposed·May 1, 2026·91 FR 23377

    Airworthiness Directives; General Electric Company Engines

    comments close Jun 15, 2026#2026-08549

24. Proposed·May 4, 2026·91 FR 23919

    Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes

    comments close Jun 18, 2026#2026-08593

25. Proposed·May 4, 2026·91 FR 23922

    Airworthiness Directives; Airbus SAS Airplanes

    comments close Jun 18, 2026#2026-08594

26. Proposed·May 7, 2026·91 FR 24757

    Airworthiness Directives; Airbus Helicopters

    comments close Jun 22, 2026#2026-09036

27. Proposed·May 7, 2026·91 FR 24754

    Airworthiness Directives; Airbus SAS Airplanes

    comments close Jun 22, 2026#2026-09077

28. Proposed·May 7, 2026·91 FR 24752

    Airworthiness Directives; Hélicoptères Guimbal Helicopters

    comments close Jun 22, 2026#2026-09037

29. Final·May 8, 2026·91 FR 25092

    Airworthiness Directives; Airbus SAS Airplanes

    effective Jun 12, 2026#2026-09169

30. Final·May 8, 2026·91 FR 25098

    Airworthiness Directives; Airbus SAS Airplanes

    effective May 26, 2026#2026-09171

31. Final·May 8, 2026·91 FR 25102

    Airworthiness Directives; Embraer S.A. Airplanes

    effective May 26, 2026#2026-09172

32. Final·May 8, 2026·91 FR 25096

    Airworthiness Directives; Gulfstream Aerospace LP Airplanes

    effective Jun 12, 2026#2026-09170

33. Proposed·May 12, 2026·91 FR 25809

    Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

    comments close Jun 26, 2026#2026-09381

34. Final·May 13, 2026·91 FR 26906

    Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

    effective Jun 17, 2026#2026-09521

35. Final·May 13, 2026·91 FR 26901

    Airworthiness Directives; Leonardo S.p.A. Helicopters

    effective Jun 17, 2026#2026-09516

36. Final·May 13, 2026·91 FR 26897

    Airworthiness Directives; Leonardo S.p.A. Helicopters

    effective Jun 17, 2026#2026-09520

37. Final·May 13, 2026·91 FR 26895

    Airworthiness Directives; The Boeing Company Airplanes

    effective Jun 17, 2026#2026-09535

38. Proposed·May 13, 2026·91 FR 26952

    Airworthiness Directives; Diamond Aircraft Industries Inc. Airplanes

    comments close Jun 29, 2026#2026-09574

39. Proposed·May 13, 2026·91 FR 26949

    Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

    comments close Jun 29, 2026#2026-09576

40. Final·May 14, 2026·91 FR 27187

    Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes

    effective Jun 18, 2026#2026-09658

41. Final·May 14, 2026·91 FR 27189

    Airworthiness Directives; Airbus SAS Airplanes

    effective Jun 18, 2026#2026-09663

42. Final·May 14, 2026·91 FR 27185

    Airworthiness Directives; Airbus SAS Airplanes

    effective Jun 18, 2026#2026-09659

43. Final·May 14, 2026·91 FR 27183

    Airworthiness Directives; Airbus SAS Airplanes

    effective Jun 18, 2026#2026-09662

44. Final·May 14, 2026·91 FR 27195

    Airworthiness Directives; Dassault Aviation Airplanes

    effective Jun 18, 2026#2026-09660

45. Final·May 14, 2026·91 FR 27193

    Airworthiness Directives; Dassault Aviation Airplanes

    effective Jun 18, 2026#2026-09661

46. Proposed·May 15, 2026·91 FR 27873

    Airworthiness Directives; Airbus Helicopters

    comments close Jun 29, 2026#2026-09773

47. Proposed·May 15, 2026·91 FR 27871

    Airworthiness Directives; Diamond Aircraft Industries Inc. Airplanes

    comments close Jun 29, 2026#2026-09772

48. Proposed·May 15, 2026·91 FR 27878

    Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

    comments close Jun 29, 2026#2026-09771

49. Proposed·May 15, 2026·91 FR 27876

    Airworthiness Directives; Stemme GmbH Gliders

    comments close Jun 29, 2026#2026-09801

50. Proposed·May 20, 2026·91 FR 29389

    Airworthiness Directives; Airbus SAS Airplanes

    comments close Jul 6, 2026#2026-10047

51. Proposed·May 20, 2026·91 FR 29391

    Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines

    comments close Jul 6, 2026#2026-10076

52. Final·May 21, 2026·91 FR 29888

    Airworthiness Directives; Bell Textron Canada Limited Helicopters

    effective Jun 25, 2026#2026-10167

53. Final·May 21, 2026·91 FR 29890

    Airworthiness Directives; Leonardo S.p.a. Helicopters

    effective Jun 25, 2026#2026-10170

54. Final·May 22, 2026·91 FR 30201

    Airworthiness Directives; Airbus SAS Airplanes

    effective Jun 8, 2026#2026-10272

55. Final·May 22, 2026·91 FR 30191

    Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines

    effective Jun 26, 2026#2026-10360