What is the process for lowering the landing gear of an A320 when the hydraulic and electrical systems are not operational? What happens to the aircraft when you lower the landing gear with inoperative hydraulic and electrical systems?

  • 3
    $\begingroup$ What do you want to know? How the gravity extension works? What linkages are involved? $\endgroup$
    – Ron Beyer
    Commented May 20, 2019 at 18:20
  • 1
    $\begingroup$ Yes. How does the gravity extension works and what happens to the aircraft when you lower the gear when hydraulic and electrical system is not operational and what linkage are involve. $\endgroup$
    – Suzy
    Commented May 20, 2019 at 22:10
  • $\begingroup$ Related $\endgroup$
    – Pondlife
    Commented May 21, 2019 at 22:51

1 Answer 1


The A320 has an emergency gear extension handle to deploy the landing gear by gravity in case of electrical, hydraulic, or mechanical failure. To force the landing gear to extend, one of the crew must pull the emergency gear extension handle up, then turn it clockwise three turns. The cutoff valve then shuts down hydraulics to the landing gear system and depressurizes it. This allows the landing gear to fall free to the down lock position by gravity.

Source: a320dp.com


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .