B737 800 APU start and cockpit prep

Рет қаралды 1,005,155

3 жыл бұрын

Starting of the APU and pre flight check. Not all the checks are done in this video but gives the viewer a good understanding of cockpit prep prior to crew checks for departure. Visit the channel for more. Please like , subscribe and share....Super thanks also welcome. Most of all: Thanks for watching.

Пікірлер: 941

@Play_da_lele 3 жыл бұрын

The 737 cockpit preparations, the switches, the sounds, the "analog" feeling just makes me feel good. I love this aircraft

@noahwilliams8918 2 жыл бұрын

If you want to get even older with it, check out an MD-80 cockpit!

@uTube486 2 жыл бұрын

Sorry, It has stupid intake nacelles! They should be round! JK

@AviationEngineering1972 2 жыл бұрын

Jip, based on the DC9 and they even hide circuit breakers behind the bins in the cockpit on the MD80 'cause of lack of space. Mostly instrument backlighting.

@sundar999 2 жыл бұрын

@@uTube486 Tell the Boeing engineers! They will say: Oh we didn't think of that, so thank you, it will be rectified

@uTube486 2 жыл бұрын

@@sundar999 Can't find their phone number...

@allenschermerhorn941 Жыл бұрын

Some of the comments here are absolutely stupid. Who cares if this guy is an Engineer or a Pilot? He obviously knows his way around the cockpit of this plane, and the video itself was really informative. Some of you really need to leave your mom's basement once in a while.

@AviationEngineering1972 Жыл бұрын

Oh oh oh Engineers need a hero too.....Well done my friend.

@allen480 Жыл бұрын

@@AviationEngineering1972 I totally agree with you and Allen. Fly safe and hello from central Arkansas sir!

@kamakaziozzie3038 Жыл бұрын

That’s what I said about Uncle Joe before the 2020 election. But he didn’t listen! Brandon stayed in mom’s basement!!

@matuscorpo5478 Жыл бұрын

are you gay or just a trans?

@PMDG738flyer Жыл бұрын

@@matuscorpo5478 This ain't an "lgbt" comment section, it's about aviation

@tinture2822 2 жыл бұрын

2:17 for apu gen off bus ding. It is simply the best sound I think I've ever heard in my life.

@yourbigfan1777 2 жыл бұрын

I tho its seatbelts and no smoking signs on/off

@AviationEngineering1972 2 жыл бұрын

Does sound similar... Its a problem in most aircraft cockpits. If you look at the black box crash investigations and see how many times pilots are overwhelmed and confused due to similar warning sounds....could be a problem unless you spot the problem or realize the mistake quick enough.

@mrcoolpotato485 Жыл бұрын

Thanks mate! I couldn't get my 737 to start this morning.

@AviationEngineering1972 Жыл бұрын

I have the same problem sometimes, starting my space ship!!!! I get confused with the buttons and can't feel them in the gloves of my space suit!!!!

@marS3l Жыл бұрын

This helps more to set up the PMDG 737-800 than any video from sims! I always felt like I forgot a few things, well now I know what to do, will be watching this a few more times to memorise it.

@MadMaxW22 Жыл бұрын

You Are right. I learned from this video when i started with PMDG 😊💪

@aayanbaig4775 Ай бұрын

I was literally predicting each step thanks to my simming experience. THANKS XPLANE!!

@sourishroy1208 5 ай бұрын

Thank you! I couldnt turn on my 737 this morning ...

@ferofiz 2 ай бұрын

if you work for an airline that requires you to, then this is useful. Pilots, Tow Teams, or Mechanics

@jimmyjango5213 Жыл бұрын

Thankyou Mr South African sounding man for showing me the start up sequence of an aircraft I'll never fly. Enjoy your fantastic piloting career!

@AviationEngineering1972 Жыл бұрын

Its my pleasure.....NOT a Pilot. Pilots superhero.(Engineer). Cause they also need someone!!!!!!! Thanks for the support.

@AviationEngineering1972 3 жыл бұрын

It's a pleasure....hope to do more... But difficult now cause working short time...thanks for ur support

@praviator4507 3 жыл бұрын

Sir...can I have your email address

@nokalamaduna2709 2 жыл бұрын

No problems capt, anytime the opportunity arises, we'll be waiting here.

@iamrightoutsideyourwindowhello Жыл бұрын

CRTL + E usually works too

@aeiou6410 Жыл бұрын

🗿

@GoneDeathMode 2 жыл бұрын

Always a pleasure listening to Andy Serkis carrying out a speech.

@AviationEngineering1972 2 жыл бұрын

ooooh nice comment... didn't know him and googled.... I sort of see the point....if only. Thanks

@YukariAkiyama Жыл бұрын

Thanks, now let me go start up my own Boeing 737 800

@ehss192 Жыл бұрын

30 years ago I passed on being an aircraft tech and got into telecom instead. Wish I would have went the other way some days. I love the 737 and it's systems. It's very intuitive. In my spare time I'm a wanna be pilot in simulators and this helped a ton. Great video!

@AviationEngineering1972 Жыл бұрын

It's my pleasure.....Hope it helps simplify things.

@pookstah Жыл бұрын

@@AviationEngineering1972 So cool! Just bumped into this video and saw you reply after such long time. First year aviation engineering student and pretty involved simmer here.

@AviationEngineering1972 Жыл бұрын

@@pookstah Glad to see someone has time for Simming....Good luck with your studies....Welcome to the club.

@DoorsplayerHD 8 ай бұрын

Thanks very much it took almost 1 hour to start my 737 everday

@Plane_Person 8 ай бұрын

Same bro

@ErikN1 7 ай бұрын

Isn't it the worst when it takes an hour to start your vehicle for the 10 minute commute to work?

@freddielo4330 Ай бұрын

Wow, came for the 737, stay for the voice!

@paulminshall8793 2 жыл бұрын

After seeing the Airbus startup, it's nice to see actual clunky switches and what sounded like an 'egg timer' as a warning bell.

@AviationEngineering1972 2 жыл бұрын

The Airbus is easy....turn Batt.. fiddle some switches to test fire warnings and so on, then APU...Then sit on your hands and don't touch anything until the self tests are complete. Else you build in your own "snags".

@millomweb 2 жыл бұрын

He didn't show winding up the spring for the 'egg timer' bell ;)

@kaanxxx 3 жыл бұрын

Fantastic video, thanks for sharing! It's always great to see the cockpit up close and personal like this.

@AviationEngineering1972 3 жыл бұрын

Glad you liked it....wish I could film all day but I'm working at the same time so not always easy...active flight line is hectic....time is money..

@feelthemusic7559 3 жыл бұрын

Lion air boeing 737 max 9800 km/h 278

@dystopian.. Жыл бұрын

Very cool. I always get a kick out of all the Sullys in the comments. Thanks for sharing.

@LasVegas68 3 жыл бұрын

Back in the 90's I got a chance to sit in the cockpit of a 747, the number if switches and control knobs was just overwhelming. Thanks for sharing your video.

@AviationEngineering1972 3 жыл бұрын

Had the opportunity to work on the B747-400 for a few years. They were getting a bit older now but wow!!!!! Pity Covid stuffed it all up. Would like to have seen them in the sky a bit longer. The ones that came to Cape Town were British Airways and they all are scrapped now...sad but true.

@ahmadjmms 2 жыл бұрын

Wonderful video. Cant wait for PMDG to release their b737 for msfs 2020.

@AviationEngineering1972 2 жыл бұрын

Cant play Flightsim yet....My house got robbed and the kids stole my joystick. Will get there again.

@randysmitchell4810 3 жыл бұрын

One of the most interesting videos I've seen - fascinating.

@AviationEngineering1972 3 жыл бұрын

Glad you think so. Thanks for watching...

@shawnforry9283 3 жыл бұрын

GREAT video! Love the attention to detail that you show that isn't in a lot of these kinds of videos.....

@AviationEngineering1972 3 жыл бұрын

I appreciate that!

@andreaernestoreani9599 2 жыл бұрын

I fly 737 on X-plane and Prepar3D and i think that reached an impressive level of reality. I love watching video from real Pilots and understand everything. Great video, Thank You.

@AviationEngineering1972 2 жыл бұрын

Glad you enjoyed it! I'm just a Technician by the way.....but we need to know more than the Pilots to keep the aircraft flying. We are there HEROES, else the just be bus drivers.

@KOrgan0414 Жыл бұрын

This guy is really taking the roundabout way of starting it up. Why didn’t he just press Ctrl+E on his keyboard? Just kidding. Great video!

@tiagoirleu7885 10 ай бұрын

Thanks buddy for the video! I really appreciate it!!!

@rangerrick8220 2 жыл бұрын

I fly the 737-800 in Xplane and am amazed how accurate the sim is to this. Understood all you did. Thanks!

@AviationEngineering1972 2 жыл бұрын

Glad you liked it Ranger Rick...

@robincagan462 Жыл бұрын

Thank you so much for this great video! Not that many on youtube go this in depth. Really good!

@AviationEngineering1972 Жыл бұрын

I had a look again.....Should have done more....Went to fast(Time Constrained)

@Eldorado821 3 жыл бұрын

As a former Israel Air Force aircraft tech, I feelll a pinch of nostalgy always watching these videos! THANK YOU VERY MUCH AND HOPE TO SEE MORE VIDEOS LIKE THIS! David from Israel

@AviationEngineering1972 3 жыл бұрын

Thats why I put the Cheetah vid on for you to enjoy...Thanks

@Eldorado821 3 жыл бұрын

@@AviationEngineering1972 thanks! Watched it! Adorable. Indeed, once an aviator, always an aviator

@ka3ax85 2 жыл бұрын

I love the information the aircraft is sharing with the pilot.

@AviationEngineering1972 2 жыл бұрын

Compared to newer aircraft its basic but very mechanical. No real computers here...just a few digital inputs here and there. Nice old school flying (almost)

@harrazmasri2805 Жыл бұрын

thanks, i can't wait to start my 737 in my dream tonight

@mccloysong 3 жыл бұрын

After a few hundred hours in the 737, I imagine it becomes rote, but wow, what a list to check just to get started. It took my ear a minute to tune to the South African (?) accent, but so enlightening.Thank you.

@AviationEngineering1972 3 жыл бұрын

Check your discussion on your channel.. Thanks very much.

@alferfoot1861 2 жыл бұрын

Totally Love this video..with the close up video..I've always loved the cockpit area..great stuff

@AviationEngineering1972 2 жыл бұрын

Thanks, more to come I hope....Our company downsizing due to Covid. So a bit stressful now.

@alferfoot1861 2 жыл бұрын

@@AviationEngineering1972 understood

@WNFlyer Жыл бұрын

thank you for this video! i always loved the 737 startup :)

@AviationEngineering1972 Жыл бұрын

Glad you enjoyed it!

@FOBob-sr1fd 3 жыл бұрын

Most excellent walk through of the preflight. Thanks!

@AviationEngineering1972 3 жыл бұрын

Well thank you sir. Thanks for the support.

@millomweb 2 жыл бұрын

Was the left wing missing ;)

@martinko2110 2 жыл бұрын

What a gem this is! Thank you sir ✊

@AviationEngineering1972 2 жыл бұрын

Not easy to get nice long video as I don't have much time before crew gets onboard, So kind of a one take wonder...Thank you for the support.

@andrewleatherman4931 3 жыл бұрын

Excellent video! Loved the detail and the explanation. Looking forward to more.

@AviationEngineering1972 3 жыл бұрын

Awesome, thank you!

@thespaceelefant2441 8 ай бұрын

I SWEAR its like listening to australian batman startup a passenger airliner lmfao

@taffygrant2928 7 ай бұрын

Thats a south African accent not Australian

@flyc3 3 жыл бұрын

Oh wow, an -800 with eyebrows! Cracking video!

@yourbigfan1777 2 жыл бұрын

What is eyebrows? Is it 4 small windows on a roof?

@AviationEngineering1972 2 жыл бұрын

Eyebrow windows are being removed.. So some cockpits don't have windows 4 and 5.(The Eyebrow windows)

@d_kortman 2 жыл бұрын

You knew exactly who would watch this vid. All of us avgeeks! Amazing video sir, loved the procedure. Like everyone else is saying, I fly this aircraft in simulators and they function exactly like the real thing. I’ll hopefully be building a 737-800 home cockpit for sim use in the future.

@AviationEngineering1972 2 жыл бұрын

Its because I'm an avgeek too. Good luck with the build. I've seen some guys do it on KZfaq by ordering pre-made panels. Cant remember from where but do remember that it was expensive. Sell a kidney, rob a bank or something. My little piggy bank has to little money and the Ball and chain will have a fit if I spend about half what my house is worth on "flying" in my lounge. She says sitting in a chair at home is not flying. Clearly does not understand the skill and effort it takes to do it properly.

@Elmantukas Жыл бұрын

Thanks for the video! I work on the P8's which is basically a modded 73-8, and boy do we have to go through the book to start the apu, takes about 10 minutes to get it running!

@justing42 10 ай бұрын

That’s stupid. It should never take that long.

@Elmantukas 10 ай бұрын

Oh I absolutely could not agree more with you on that one, but sadly it is stupid, everything is so over the top its actual aids

@cheese9293 2 жыл бұрын

Thanks for the tutorial! Just about to steal one from the hanger.

@AviationEngineering1972 2 жыл бұрын

You're welcome....Just don't tell them where you got the know how from!!!! Good luck.

@That_9N 2 жыл бұрын

😂😂😂😂

@18skaterboy18 3 жыл бұрын

Lovely, thanks for the video. Really high quality

@AviationEngineering1972 3 жыл бұрын

My pleasure!

@DanRasmussen72 2 жыл бұрын

Make more of these... very useful for us cockpit builders :)

@AviationEngineering1972 2 жыл бұрын

Going to try....Might not have a job tomorrow....but its not the first time... If this is my new source of income, its not working.... Better than ZERO I guess

@DanRasmussen72 2 жыл бұрын

@@AviationEngineering1972 It's not an easy market atm... sorry to hear that job security is bad

@ricklockhart6576 Жыл бұрын

Great video, very informative.

@augusttiner3235 Жыл бұрын

Wow awasome, pls more

@sidneyalmeidajunior7968 2 жыл бұрын

This is machine! Machine! Thank you for video!

@AviationEngineering1972 2 жыл бұрын

Thank you too!

@kunaldebbarma8086 Жыл бұрын

thats the deepest voice i have heard , i bet the passengers when they hear him on PA get startled as to who is commandeering the aircraft 🤣

@AviationEngineering1972 Жыл бұрын

I stay on the ground for safety reasons(LOL).....I'm an Engineer, but I must be ugly as the Pilots often say I have a good voice for radio!

@jaystengel7511 9 ай бұрын

All this and its still easier than Asking my wife what she wants for dinner.

@ghdwk5596 5 ай бұрын

Tell me you’re a boomer without telling me you’re a boomer

@1rem1Art 3 жыл бұрын

Thank you sir, I enjoyed every second of it:)

@AviationEngineering1972 3 жыл бұрын

Thanks for watching and subscribing. Very kind of you.

@Paradyski Жыл бұрын

Nice video, thanks. Love 737

@hurolbesgul Жыл бұрын

It's a very realistic and beautiful video, congratulations.. I actually fly with Cesnna 150, but in FSX my favorite was the B737 - 800 NGX . I think the location is Cape Town International Airport Gate 8. I am waiting for your new video for engine start and take off. Thanks again.

@pilotpawanc Жыл бұрын

Beautifully explained.. Loved it!!!

@atm31ac21 Жыл бұрын

That was an awesome video mate

@AviationEngineering1972 Жыл бұрын

Glad you liked it.....more coming...just tied up with courses and refreshers from new company....and fixing my daughters car in-between. Running all the time....got some more stuff. Just need time to sit and process it.

@atm31ac21 Жыл бұрын

@@AviationEngineering1972 Good stuff. Cant wait

@bss445 Жыл бұрын

Thank you for preparing.. bless your heart

@FlightProSim 3 жыл бұрын

Awesome video. Keep them coming bro!

@AviationEngineering1972 3 жыл бұрын

Will do...

@The_Plane_Spotters Жыл бұрын

I LOVE THE 737NG such an amazing Aircraft :D. I once got invited as a passenger to join the pilots in the cockpit on approach and landing and since then I absolutly love the 737 and fly nothing else in Xplane. I really want to become a real pilot on the 737 :)

@ascherlafayette8572 Жыл бұрын

My man casually sneaking in

@AviationEngineering1972 Жыл бұрын

Only because of the tall grass....Nice comment.

@siddiquesadhmansulov4564 Жыл бұрын

What a brilliant shot

@andriynechay8604 Жыл бұрын

Good pilot is an good engineer. Many thanks for this very useful explanation!

@Starvaze 4 ай бұрын

If im gonna learn aviation. I might aswell embrace the -guts of the beast- internal workings of the cockpit

@robloctwistedplayer Жыл бұрын

Me plugging on the tv and my grandpas perspective be like:

@AviationEngineering1972 Жыл бұрын

Understand completely.... My Mom was the same. Between local, paid TV and the old VHS machine....Never understood which channel or "remote" (clicker) to use....She taped a lot of "SNOW"!!!!!!

@steveyford7127 4 ай бұрын

Superb mate, thanking you for sharing 😊

@daveharveys Жыл бұрын

Excellent informative presentation thanks

@starpawsy Жыл бұрын

Love the Captain Cool voice :O

@AviationEngineering1972 Жыл бұрын

I'm an engineer.. they relax after I talk to them too!!!!

@canada_dry1219 2 жыл бұрын

Oh thanks I needed help starting up my 737

@AviationEngineering1972 2 жыл бұрын

Glad I could help

@AviationEngineering1972 2 жыл бұрын

Like your tail....nr

@Mike25654 2 жыл бұрын

Thanks for the video! We need to have the APU running for at least one minute before we can select bleed air.

@AviationEngineering1972 2 жыл бұрын

Jip and more depending on the FCOM and the company procedures. ( I've been rasped over the knuckles by a few subs.)

@nokalamaduna2709 2 жыл бұрын

Carry on Captain we appreciate this effort of showing us this magnificent plan, it looks exactly like my 737-800X that I am flying in Xplane 11, your APU takes just a bit longer to start than mine with that nice spooling up sound coming up. We're waiting for more clips like this. Thanks a lot.

@AviationEngineering1972 2 жыл бұрын

Its old and takes longer to start like me...No the combustion chamber and plug are a matched set.. Sometimes they get mixed in the stores IPC. Then paperwork screws us. It happens. Waiting for comments on this one...

@nokalamaduna2709 2 жыл бұрын

@@AviationEngineering1972 That's understandable Capt, this beauty is many moons old than many planes out there but we still love it to bits just like you do. 🙏🙏👍👍

@kudacuda4350 6 ай бұрын

Been doing that in a sim , glad to know I was pretty close on procedures.

@AbhikMallik 2 жыл бұрын

Thank you for this informative video captain🤗❤️

@AviationEngineering1972 2 жыл бұрын

Captain? Nah.... I just kick the tires here and there. Someone has to fix it, right. Thanks for the upgrade. Can I get the salary too.

@AbhikMallik 2 жыл бұрын

🤔

@nevillec5252 2 жыл бұрын

Excellent; well-explained. Thanks. Hope you make many more similarly informative clips.

@AviationEngineering1972 2 жыл бұрын

Will do...

@HuzzaTVDreamBook 3 жыл бұрын

Nice information vlog 🙏 episode 👍

@AviationEngineering1972 3 жыл бұрын

So nice of you

@Denis-xl9or 3 жыл бұрын

FCOM 7.30.3 - Operate the APU for two full minutes before using it as a bleed air source.

@AviationEngineering1972 2 жыл бұрын

And so are speed limits but do we listen....om you win.

@AviationEngineering1972 2 жыл бұрын

Lucky om is my second language.

@nicholasbloch605 2 жыл бұрын

I need one of these videos for an Airbus…. Great video tbh

@AviationEngineering1972 2 жыл бұрын

When we start using the airbus A319/320 I will make one for that too....

@nicholasbloch605 2 жыл бұрын

@@AviationEngineering1972 Now is that upcoming or are you just getting my hopes up? Btw awesome video

@AviationEngineering1972 2 жыл бұрын

My company is hoping to start up in this month with flying again( Covid ). We only have Airbus in our fleet.. So hope to do one soon

@MathasarSalazar2 2 жыл бұрын

Marco Pierre White did an absolute wonder of a job with this video. All jokes aside, this is really cool to see these machines powered on. Bravo.

@AviationEngineering1972 2 жыл бұрын

Did'nt know this was going to happen....hope its not a one hit wonder....thanks

@alekmaceda875 3 жыл бұрын

Great video man, so inspiring :)

@AviationEngineering1972 3 жыл бұрын

Appreciate it!

@dommon44 8 ай бұрын

Thaks you very much

@oatmealinus Жыл бұрын

The air con noise when you start up the app is just… It’s an indescribable feeling

@AviationEngineering1972 Жыл бұрын

WhOOOOOOOOOsh!!!!!!!! Thanks for your support... Had a video of the cold air streaming(visible cloud) from a B747-400 and somehow lost it....

@priscillaperez7388 2 жыл бұрын

the best video!!! thank you so much

@AviationEngineering1972 2 жыл бұрын

Thank you soooo!!! much for your support..... Glad you enjoyed it.

@alimohammedhaider6611 2 жыл бұрын

The left wing no.1 fuel pump was required to boost fuel flow to the APU in the classics but this isn’t required for the NGs. A DC pump functions to increase fuel flow to the APU automatically once the APU is powered on.

@guidancefromjah 2 жыл бұрын

Still part of procedure.

@romanwowk4269 Жыл бұрын

Haha - I've heard those wind shear, terrain, bank angle etc warnings while boarding before...now I know what that's from ;)

@AviationEngineering1972 Жыл бұрын

See.....Now this helps someone....

@jakepatchogue9478 4 ай бұрын

Looks so antiquated compared to Airbus APU startup

@motohddk Жыл бұрын

Very nice, thank you!

@eurotexan9799 Жыл бұрын

Gotta love eyebrow windows! 👍

@coreoflore4102 6 ай бұрын

Thanks comrade it helped me steal one B737 from the airport now I can resell it and can become millionaire

@ahmetkayan8273 6 ай бұрын

😂👍

@skinpin2994 4 ай бұрын

Thanks for showing I have to fly in a hour 😓

@aftbit 7 ай бұрын

Great content! I'd love to see a full startup at full speed :)

@noway9880 Жыл бұрын

Oh. Hey. The GPWS test seems to run the TCAS test too... the 737-600 has a seperate panel for tcas/tcas test.

@streammlock09 Жыл бұрын

Very nice video! Cockpit needs a clean though

@viper6963 2 жыл бұрын

wow, these dcs graphics are great

@theyalesubrailfan1849 2 жыл бұрын

*Xplane11

@AviationEngineering1972 2 жыл бұрын

Funny.

@aux2991 3 жыл бұрын

Great video!

@AviationEngineering1972 3 жыл бұрын

I can only try. Thanks for your support!

@cpt.jeevan4756 3 жыл бұрын

Very cool

@AviationEngineering1972 3 жыл бұрын

Thanks for the sub....

@cpt.jeevan4756 3 жыл бұрын

@@AviationEngineering1972 np

@pauldionne2884 Жыл бұрын

I'm busting out through the cockpit window as soon as I hear "pull up"!

@hmm396 Жыл бұрын

That’s why you’re not gonna be inside a cockpit

@hassaneelbarraqui6068 3 жыл бұрын

Really awsome good job

@AviationEngineering1972 3 жыл бұрын

Thank you kindly...

@WillPearsonAviation 3 ай бұрын

Good Stuff!😀🙌🏽💪🏽

@overthere9776 2 жыл бұрын

Wow, couldn't there just be a key to turn in the ignition to start the whole thing up?

@AviationEngineering1972 2 жыл бұрын

Would be nice, but someone will loose it or take it home.....some light aircraft do have keys as an extra measure of protection.

@hariranormal5584 3 жыл бұрын

Damn so beaufiul

@AviationEngineering1972 2 жыл бұрын

Ahh thanks.....!!!!

@luigi7026 Жыл бұрын

Very very good !! Thank you very much 👍👍👍👍

@AviationEngineering1972 Жыл бұрын

Glad you enjoyed the video.....thanks for watching and supporting.

@johnjohn55555 3 жыл бұрын

Great video, thank you.

@AviationEngineering1972 3 жыл бұрын

Glad you liked it!

@thumbmaster4543 2 жыл бұрын

Boeing 737NG is love ❤❤❤

@AviationEngineering1972 Жыл бұрын

Yoda!!!

@docweirdo 2 жыл бұрын

5:33 Did not quite understand how you’ve tested the landing gear lever. Did you pull it towards you? Thanks in advance!

@4mul 2 жыл бұрын

no, i believe he clicked it down, it seems that there is one extra click down

@AviationEngineering1972 2 жыл бұрын

The lever is spring loaded. To test it you pull towards you and it tests the lights, On the lower part is a manual override (looks like trigger), which allows you to release the gated slot and select the landing gear lever into the position required.