Chapter 70 hanger doors are closed and need to be open to finish. How to open them please?

Sequence will open after you finish all the steps in the walkthrough

Here is the walkthrough from Gamers Unite:

Volume 1, Chapter 14 - "Airplane Hangar"

01. Get The Jack

02. Place The Jack Under The Plane

03. Get Bicycle Wheels

04. Put Wheels On Plane

05. Get Hose

06. Get Funnel And Combine With Hose

07. Place Hose And Funnel In Plane

08. Get Jerrycan

09. Place Jerrycan Fuel In Plane

10. Open Blue Cabinet

11. Get Propeller

12. Place Propeller On The Plane Nose

13. Approach Radio

14. Turn Left Knob Twice To Get "3"

15. Turn Right Knob Once To Get "2"

16. Get Key

17. Use Key To Unlock Locker

18. Get Aviator Helmet

19. Place Helmet In Cockpit

https://www.gamersunite.com/scenes/airplane-hangar