¿Whaté happens if for some reasonún reason téconical does not lower landing gear avión in which you fly? Hereí we tell you whaté they do the pilots in this situationón. Photo by Viktor Forgacs
Perhaps, did you ever wonder whaté happens in this situationóDidn't you see any news where an airplaneón teníto problems in the landing gear and más of raises doubts about whaté what pilots do, a part of you generatedó fear to fly.
Although it is not a situationón normal or happens every dayías, These are situations that can occur., since an avión is an máwhich one isá exposed to high pressures, extreme weather, high speeds and más, that in the long runígenerate failures of various types, per más strict maintenance that the aerosolíneas comply.
Before getting into the matter, it is important to point out that:
- Not all airplanes have retractable landing gear.áctil, mainly training or aviation aircraftón general.
- Every grandparentón and manufacturer has its own procedure for this situationón.
Whaté What do pilots do if the landing gear doesn't go down?
Today we are going to talk about the specific caseífico de Boeing, just for reference, and as we already indicated from avión a avión this procedure changes, but the concept is the same.
In the hypothetical caseéI hope the landing gear suffers one dayñor this is for maintenance, due to impact of somethingún extra elementñor or for any other situationón, there is always a plan B and even C.
Extensionón normal
When the landing gear lever is moved to positionón DN, the train doors open, the train unlocks and the GEAR and DOORS lights come on. The train runs on energyíof hydráulica until it lowers and is in positionón.
The closures are activated until the positionólock no., all hydraulic driven gear doorsáulically close and the main gears tilt hydraulically.áonly to the positionóflight number. When all gears areán low and blocked, gear down lights illuminate and GEAR and DOORS lights turn off.
Extensionón alterna
La extensionóA train alternative uses a smallñto bomb hydráulica theéto release the doors from the gears and locks, allowing the landing gear to fall freely into position.ón down and locked.
The fluid inside the lísupply line to the pump is sufficient for operationón alternative of extendedón. This fluid isá isolated from the hydraulic systemámain and secondary street. All landing gear doors remain open afterés of the extensionón alternative and once the train has been extended with the alternative system, this can't be retroído again.
In other cases, the alternate system is manual and requires “pumping” by the pilots.
¿And if no opcióit doesn't work?
In this case, the pilots will immediately referán to the QRH or aircraft manualón to review the different procedures to follow whether to try to lower the gear again or decide to make an emergency landing without landing gear.
El QRH ( Quick Reference Guide) tells us, if the hydraulic systemáprincipal falla street, and the secondary tooén, use the alternate extension systemón of gear and if this does not work it means that one or more wheels are seriously damaged or the rubber of the tire or part of the landing gear itself such as the shock absorber or actuators or springs that are jamming the caífrees the landing gear from its positionóstorage number in the fuselage.
So pilots must plan a landing with whatever landing gear we have available. (If there is one), configure the aircraft by silencing all visible and audible landing gear alarms, find the longest runway and use maximum flaps for landing.
There is no doubt that the úa pilot's last resort will beá to land “belly” no train and we have seen it before as in this case:
The situationón for which alsoén the pilots areán highly trained and trained.
When I saw the title, the first thing that came to mind was the image at the end of the post., what things.
Luckily these types of misfortunes are not so bad. Unless PIA Pakistan is the airline involved, sometimes you come across a capable cabin and other times you don't.
Precisely, the one from LOT inspired this installment.
Very poor, the article should have been more supported and explanatory of procedures so that the passenger is truly enlightened
What a pity he missed the opportunity to make an excellent explanation of the alternatives
Help us to complement it please, If you have more support to be able to illustrate it, you can leave it here in the comments or send it to [email protected]. The idea is also that everyone contributes to the community in general.