Boeing made some unnecessary and troublesome deviations from the classic 737 when they rolled out the -700, the first NG, in 1997. One was the mechanism of the landing gear handle you see in the video. The handle operates a cable run that goes back to a shaft that operates the landing gear hydraulic control valve in the wheel well. It was trouble free on the classics. On the NG, Boeing wanted to move the forward cable pulley away from the handle, I suppose to make more room for the new instrument panels. So they inserted a push-pull Teleflex cable between the handle and the pulley. Every mechanic in aviation knows how troublesome such cables can be, no matter what kind of airplane they are used in. Sure enough, after a few years of service the push-pull cables began binding in the sheaths, and a -700 crew found that they could not lower the handle to put the gear down for landing. They tried so hard that they actually bent the gear handle. Finally they were able to free fall the gear into position by the trusty handles and cables shown in the video, and land the plane safely. Boeing did a lot of other stupid stuff that made me wonder if the designers of the NG were even familiar enough with the classics to know what works and what does not work on a 737. Maybe I should write a book.

@alterlimit

6 ай бұрын

It looks like you are very familiar with Boeing :) are you and engineer ?

Them planes are alot bigger then people think they are. Interesting

@alterlimit

Жыл бұрын

They are for sure :)

The Max 10 gears are actually longer but are still stored in the same size bay. The gears are telescopic so as they are retracted the length is shorted.

@alterlimit

5 ай бұрын

Same as a330 :)

@user-zc4db7cz7q

2 күн бұрын

365/:วัน.

ปีคศ.ดาวเทียม..สถานึไทยโชค..

I was in charge of landing gear maintenance for a commercial jet liner once. We had one plane that never retracted the front gear. It was always in the down position. Never did figure that one out but its doesn't really matter because no one really sees it at 30,000 feet.

@alterlimit

6 ай бұрын

I dont think its normal and it should fly like that, but if you say so i beleive you :)

@justing42

5 ай бұрын

sounds like they needed someone else in charge

@gamingplus8625

2 ай бұрын

wom*n can't get the job done anyways

Amazing design with no outer followup main landing gear door ro cover that exposed tire...not necessary , saves weight..

@azharsalim2028

Жыл бұрын

Yup... saves weight... and does not need complex actuating mechanism for the landing gear door system.

@justing42

5 ай бұрын

the tire IS the gear door

Why in the up position there is a sort of swing before the complete closure?

@alterlimit

6 ай бұрын

Well its normal because its with ground cart, with engine pumps its smooth!

Are the wheel cavities heated to prevent those tubing and fluid in them from freezing at high altitudes?

@get2dachoppa249

Жыл бұрын

There’s no need to heat that area. The fluid is pretty warm from going through the pump. Skydrol doesn’t freeze until -80F.

@alterlimit

6 ай бұрын

No its not required, the fluid cant freeze :)

@alterlimit

6 ай бұрын

Absolutely correct :)

How come the wheels are still visible even after they retract?

@rogueldr642smiythe9

2 ай бұрын

Thats the way the 737 was designed.

Почему шасси не защищены панелью?

@alterlimit

Жыл бұрын

Thats correct :)

Is this a B737 from ASL airlines?

@alterlimit

6 ай бұрын

Exactly :)

มุม.ฐาน.ะบล้อ..คัสเตอร์..ทัมเมอร์..โท..มุม..องศา.เควิน..

@alterlimit

Жыл бұрын

Dont know what it means :)

the problem of the 737 is right here , no room for an extended undercarriage , therefore no room for big engines

@azharsalim2028

Жыл бұрын

If you are referring to size, yes, the CFM-56 is abt the max physical size engines that can be fitted with regards to the current landing gear. However, as far as thrust rating is concerned, these engines hv a huge power (approx 27,000 lbs each). The early generation of engines (JT8D), were ONLY producing 15,000 lbs each. Meaning, a single CFM56 is as powerful as two JT8Ds.... which is highly adequate.

@alterlimit

Жыл бұрын

This is the reason 737 max engine is elevated through pylon design change compared to 737 classic. Due to the fuselage and landing gear remain approx the same.

@patthewoodboy

Жыл бұрын

@@alterlimit and there was me thinking it was just so they can introduce some extra software for the flight control just for the hell of it 🙂

@azharsalim2028

Жыл бұрын

@@alterlimit ... the landing gears may look similar but they are actually different between the three era of the 737 family. They are ... 1. 737(100/200) namely called "Jurassic" 2. 737(300/400/500) called "Classic" 3. 737(600/700/800/900/Max) called "New Generation" The height dimension of the landing gears across these series, is different. Therefore, they cannot be swapped between one to another.

@mikhailjairnisbett441

Жыл бұрын

@@azharsalim2028 Max is not part of NG

That musta been a hard landing on the left boggie

@Hopeless_and_Forlorn

Жыл бұрын

737 gear does not have bogies, it has fixed axles. The video was shot from behind the left main gear. The bottom of the tires on the right main gear are marked with stains from liquids left when the airplane was washed while sitting on the ground.

@rmshivo

Жыл бұрын

@@Hopeless_and_Forlorn you're right on the bogie. thanks for the correction.

@robbiejsemperfi1033

Жыл бұрын

Easy mistake. I noticed that too. I’ve changed hundreds and hundreds of aircraft tires though none anywhere near that size and that was my initial thought was wow someone was hard on those tires.

Who ever engineer did the operational test failed to read the AMM. The throttle levers shoud be advanced forward to extinguish the red lights once the gear is up. When the throttle is not advanced the landing configuration warning is active and keeping the red lights on. So the complete operational test is incorrect because the indication system correct operation could not be verified.

@alterlimit

6 ай бұрын

Well i am an Airbus guy, but i will let them know :D

คิก..สวิช์...ออโต้...ออตโต้...เมตริก.

@alterlimit

Жыл бұрын

Dont know what it means :)

To much shit can go wrong they say it's safer to fly than drive

@cfusername

Жыл бұрын

The gear is designed that way, that it can drop out even without power. It will lock in place by itself.

@beckydoesit9331

8 ай бұрын

I was in charge of landing gear maintenance for a commercial jet liner once. We had one plane that never retracted the front gear. It was always in the down position. Never did figure that one out but its doesn't really matter because no one really sees it at 30,000 feet.

Bird strike

@alterlimit

5 ай бұрын

:D

No fly to much shot can go wrong

if it's a boeing...I ain't going!!

@alterlimit

6 ай бұрын

Well... It depends on the person :)