Oof. This video made me appreciate just how complex jet aircraft really are. It seems a lot of what goes into the design is to make the plane better behaved away from the various "sweet spots" of the flight envelope. This while maintaining the feel of the small aircraft your typical pilot came up on. Very informative video as always. Thank you, Chris.

@ChrisBrady737

2 жыл бұрын

Yes there is no doubt that there is a lot more to any airliner than meets the eye. Thanks for you kind comments.

Dear Captain Chris Brady, Thank you so much for this video, the level of the technical details is just amazing, I am really happy to find a technical source about the B737 with such a high level of details, I believe it is a great source for pilots, The pictures the graphs and the explanation is just amazing. Thank you for answering a question that I have had for quite some time on my mind, and most importantly thank you for sharing your knowledge. All the best Abdul

@ChrisBrady737

3 жыл бұрын

Dear Captain Asiri, Thank you for your kind words and for letting me use your video clip of neutral shift. I am glad I was able to answer your question. Please tell your colleagues about the video so that they may also use them. Best regards Chris

Hi Chris! Here I am again watching your wonderful and very informative videos. I truly enjoy watching them and am learning so much. You know the saying, "A picture is worth a thousand words." It's literally like putting the pieces of a puzzle together. But, you are the person that directs me as to where to pieces go, and it makes it sooooo much easier. ALOHA! Jay

@ChrisBrady737

Жыл бұрын

Hi Jay, thank you for your kind comments. I am a visual person, if I can see how something works then I can understand it. That is what I am going for in the videos. Thanks for watching!

As an aircraft maintenance engineer student , this video was really helpful and well explained , keep up the good work 👏

@ChrisBrady737

2 жыл бұрын

Thank you for your kind words, glad to hear that you found it helpful.

Thank you Chris for taking the time to share your knowledge on the 737. Your insight and explanation of the various systems are invaluable! I appreciate your videos!

@ChrisBrady737

3 жыл бұрын

Thanks Jay, it is feedback like yours that assures me that I am on the right track with these videos.

@T0MaTOS

3 жыл бұрын

@@ChrisBrady737 You are Chris! THANK YOU!

Top-quality video series. Thank you Chris for your effort to help us understand the 737. As someone not employed in aviation, I enjoy your videos due to my interest in engineering and aircraft. Your videos give me a greater appreciation of aircraft design, and the knowledge that pilots require to safely operate them. Aircraft manuals and accident reports are available online, but your videos really help to break down the sub-systems in a way that even the layperson can understand.

@ChrisBrady737

3 жыл бұрын

Thanks Doro, I really appreciate your kind words and great to hear that the videos are enjoyed by a wider community than pilots and engineers on type.

Very interesting, very detailed, very useful! I have your book, and all the pictures and info are properly linked for a great learning experience, now even on you tube, thanks!

@ChrisBrady737

2 жыл бұрын

Thank you for your great review, please tell your colleagues.

i really love the works you have done. Thank you, Sir Chris

@ChrisBrady737

2 жыл бұрын

Thank you, glad to hear that you like them. Please tell your colleagues

Captain Chris, Exceptional work! Thank you for sharing your passion, indepth insight and fantastic technical knowledge on the B737. Merci beaucoup

@ChrisBrady737

2 жыл бұрын

Thank you for your kind comments. It is always rewarding to hear that people are finding my work useful.

Thank you Captain! Can't express how much I appreciate these videos (and your Cockpit Companion app, which I reference while watching the vids). Incredible detail and thorough explanations. You have really contributed to the overall safety of anyone who flies the 737. I'll be sharing these with anyone who wants to be a more informed & competent 737 pilot.

@ChrisBrady737

2 жыл бұрын

Hi Gabriel, I have not done a "Cockpit Companion App" that must be somebody else, but thank you for your kind words.

@GabrielEngle

2 жыл бұрын

@@ChrisBrady737 Sorry I meant your book The Boeing 737 technical guide. Excellent book!

Sweet, you definitely deliver as promised. Thank you Sir chris, you're the best.

@ChrisBrady737

3 жыл бұрын

My pleasure!

Thanks a lot! I'm so happy I've found your channel!

@ChrisBrady737

2 жыл бұрын

You are very welcome.

Thanks for this great explanation of how the B737 pitch channel works.There's a lot of effort gone in on your part,so many thanks for that.I did like your video intro and closure.Best wishes from Paul.

@ChrisBrady737

3 жыл бұрын

Thanks Paul, yes I thought it was about time I introduced the videos in person!

Awesome! It's always good to see pictures of the actual systems, actuators, rods etc. Otherwise they just remain plain text in the FCOM, which is really hard to comprehend. Thank you for all those videos!

@ChrisBrady737

Жыл бұрын

Hi Buzz, that is great to hear. It is exactly why I make the videos the way I do with lots of labelled photos of the actual components. A picture is worth a thousand words!

I'm preparing for TR course and this channel is awesome. Your explanations are easy to understand and are very helpful and encourage me to learn and read more. Thank You!

@ChrisBrady737

2 жыл бұрын

That is so rewarding for me to hear. Best of luck with your TR 🤞

Awesome videos Chris. I’ve been an FO on the 73 in Oz for nearly 7 years and still learning every time I go to work. These videos complement reading the FCOM systems so well and I’m slowly working through your library. I definitely recommend your videos to the Capts I fly with and I’m looking forward to watching and re watching them! Thanks again

@ChrisBrady737

Жыл бұрын

That is great to hear and thank you for recommending my videos to your colleagues. Every day I fly I learn or see something new, what a great job we have 👍

46:51 I was genuinely not expecting that. Thanks as always.

@ChrisBrady737

2 жыл бұрын

My pleasure, glad to help you understand the finer details of the aircraft.

this must be the greatest explanation of flight controls in pitch axis

@ChrisBrady737

2 жыл бұрын

Thank you! Glad you found it useful

Thank you captain, it's really helpful presentation, can't wait for the next mach trim and speed trim system on your autoflight presentation

@ChrisBrady737

Жыл бұрын

My pleasure, glad you found it useful.

Top quality! Thank you for sharing your knowledge.

@ChrisBrady737

3 жыл бұрын

Thanks Tony, glad you liked it. Tell your colleagues

As my comment on the aileron/spoilers. Awesome videos! Really helps with preparation for my MCC course

@ChrisBrady737

3 жыл бұрын

Thanks Luuk

I love the paint detail 8:39

Great content very well explained as in the previous videos.

@ChrisBrady737

3 жыл бұрын

Thanks Paolo, I am glad you enjoyed it.

Hello capt. Thank you very much for making these priceless videos about the B737. In this presentation you mentioned that you will also make one about the auto flight system which we are patiently waiting for.

@ChrisBrady737

Жыл бұрын

I covered some autoflight in the FMC series of videos but I will get around to a dedicated autoflight video eventually.

I am flying the 737 in Infinite Flight and looking for average takeoff speed and approach and have watched more than one video. Great detail and I just learned a lot. Thank you! New follower!

@ChrisBrady737

3 жыл бұрын

Hi Mouse, it is very difficult to give an average takeoff and landing speed because it depends upon many factors e.g. the series of 737, the weight (passengers and fuel) etc. But maybe use 130kts. Glad you have enjoyed the videos. Chris

@REFEREEMOUSE

3 жыл бұрын

@@ChrisBrady737 thank you so much. I love the videos and actually learned a lot of technical things I have been wondering. Question, what is the reason of the varying degrees on the spoilers? I understand that the outside spoilers (towards the wingtips) would be a higher degree to spoil the lift on the outer portion but why not get max from having all at the same degrees on landing?

Hi Chris, Great presentation again. Nice additionnal infos to your book. Specially the fcc contolled neutral shift. Finally I could fully understand this. As an enginneer and instructor I found extremely usefull your channel. Regarding to the 737 max stab cutout switches: I think Boeing should have to revert back to main and autopilot functions after the accidents. Because now if the autopilot trim fails you cutout the main electrical trim (pilot normal electrical) too and you have only the wheel. Less redundancy

@ChrisBrady737

2 жыл бұрын

Hi Balázs, I agree, the change of function of the stab trim cutout switches was a retrograde step.

Thank you for this

@ChrisBrady737

Жыл бұрын

My pleasure

Hello Captain, i flew the 737 max 8 2 days ago from Toronto to Vancouver on a 5 hour journey

we need that Speed Trim and Mach Trim explanation in a Autoflight video!! And a Warning Systems video would be great too! Thank you for your perfect explanations!

@ChrisBrady737

Жыл бұрын

I hear you. Autoflight and Warning Systems are on my to do list.

nice n easy to understand... thanx

@ChrisBrady737

3 жыл бұрын

Thank you, that is what I was aiming for!

Great Job, that's much clear than what I could get from AMM. I thought the Neutral shift is somewhat want emulate the trim feeling on small GA using trim tab, and wonder why it did such a bad job on that, now it's clear it just doesn't care about it. Many trainee I met have problem translation from tab trim trainer to stabilizer trim airliner, I tend to show them Fig2 and 3 on 727's FCTM 04.25.02 if needed, although it's not on our official 737 training material. I wonder why that's not there in 737's FCTM then. This difference was even considered to be a factor on Flydubai's crash after Go-Around.

@ChrisBrady737

3 жыл бұрын

Neutral shift and feel are often confused because it is not explained well. That 727 reference is a good one, thanks!

Thanks for amazing videos as always, i am trying to find the video for auto flight to learn more about STS and mach trim system but i cant find it in the playlist

Very professional and nice job Chris! Always waiting for your videos! Question: In an event of an elevator jam, how does it actually behave in the tailcone the breakout system? Does it separate the left/right elevators as single units? Thank you!

@ChrisBrady737

3 жыл бұрын

Thanks Daniel, I guess you mean "in the event of a control column / cable jam". In this case the unjammed side of input torque tube will move and cause the onside PCU to move the whole output torque tube and both elevators. Think of it like flying on a single hydraulic system - both elevators move because the single PCU moves the whole output torque tube.

How does elevator manual reversion work? Is there a direct mechanical linkage / crank between the aft input torque tube and output torque tube? Couldn’t find one on the photo… Or is it that the PCU still transfer the motion, just not not magnifying the force hydraulically? Thanks anyone for an answer! And mega thanks to you Chris, I’m studying for my TR and your videos with all the extra stories are so So helpful ! :)

Great video as always! You state a number of times you were in Manual Reversion a couple of times. Maybe you could talk about that some more? How it came to that and how it felt to land the bridy :)

@ChrisBrady737

2 жыл бұрын

Thanks for your comments. I have been in manual reversion almost 200 times - all carefully planned on airtests. I may do a video on air testing in the future.

@TheTerzinator

2 жыл бұрын

That's so awesome! I guess becoming TRI and doing airtests is my ultimate goal as well :) Thanks again for your videos and your website. I'm doing TR right now and they help so much understand the systems on a practical level no CBT could ever achieve

Hi Chris, thanks for your amazingly detailed videos. I spent a lot of time in the wheel well trying to identify each piece of equipment... not respecting my company turnaround 😅 You mentioned a video where you will give more details regarding speed and mach trim systems. I am wondering if you did it yet. Also, do you have any schematic of the feel and centering unit to see what is inside ? Thxs

@ChrisBrady737

Ай бұрын

Hi great to hear that you like the videos. I havent yet dome the Mach & speed trim videos but they are on my list. I am just finishing one on GPS interference.

Thanks for your passionate efforts Capt. Just wanted to understand the dual switched for elevator trim functions, one is release the stabiliser brake (or earth return, I am doubtful with this. Or it is the alternate terminology for stabiliser brake circuit) and other to operate the electric motor?

@ChrisBrady737

2 жыл бұрын

If you mean the elec trim switches on the yoke, one is for direction, the other is the earth return.

Excellent presentation Chris👨🏻‍✈️I flew all models of the B737, with the exception of the MAX. My question, would normal, QRH “runaway stab trim” abnormal, have saved the two MAX crashes? My instincts, say yes, but I can’t seem to get a straight answer since I have retired. I always took this abnormal very seriously, and always checked the stab cutout switches, as part of my preflight. Once again, great work👨🏻‍✈️

@ChrisBrady737

3 ай бұрын

My issue with that procedure for this scenario is that it doesn’t fit the criteria. The MCAS accidents were not a runaway stab trim, they were an intermittent spurious application of stab trim. When electric stab trim was applied the “runaway” disappeared for 5sec than reared its head again. Hardly a runaway.

Thank you so much for this video. I just wanted to say that at the end of this video, you said that you show Mach trim andُ Speed trim in the autopilot video, but i did not find such a video in your Collection video . Can you guide me? Thank you

@ChrisBrady737

Жыл бұрын

I have not yet made an autopilot video

Hi Chris, Fantastic video as they all are. Quick question regarding a jam on the pitch axis. I understand how both control columns can move independently thanks to the breakout mechanism on the fwd input torque tube, but since the cables from both sides end up connected to the same elevator input torque tube in the back, I can't possibly understand how both control columns can therefore move independently. You mentioned other breakout mechanism further back. If this other breakout point is indeed on the aft elevator input torque tube, would the captain side only command the left side elevator and the FO only the right side in case of jam? Thank you for enlightening me on that matter !

@ChrisBrady737

2 жыл бұрын

It is difficult to explain in words but if say the F/Os CC (or cables) are jammed it will not move. If the Capts are free, it is able to move the elev fwd input torque tube (thanks to the breakout mechanism). This enables the aft elev i/p tt to move, which moves both elevators. Movement of the aft elev tt will move the F/Os cables (unless they are jammed) this movement is absorbed by the springs in the breakout mechanism, so the F/Os cc remains stationary.

@bondlepilote

2 жыл бұрын

@@ChrisBrady737 so not only the springs in the breakout mechanism allow independent motion of the R and L cc, but also a sort of dissociation in the motion of the fwd i/p tt relative to the elev tt ? Basically, if I understand correctly, the elev tt can still rotate if the FO cables are completely stuck, correct? Thank you very much for your prompt reply !

Hi again Chris! It’s not apparent to me how manual reversion works here. Is it like the ailerons where the input torque tube is moving the entire PCU which in turn moves the output torque tube? And why doesn’t the rudder work the same way? Many thanks!

@ChrisBrady737

Жыл бұрын

It is similar. This description from the AMM: "During a manual reversion... When the pilot moves the elevator control column more than one degree, the primary and secondary input cranks hit mechanical stops on the outside of the actuator housing. As the housing moves, hydraulic fluid in the actuator is pushed from one side to the other through the bypass valve. Movement of the housing also moves the output torque tube to the commanded position."

Hi Chris. Thanks for amazing great videos! I do have your book(been with me for many good years) its great to recap the systems. Did you get a new microphone? That's the only thing I can ask you to improve. KEEP up the good work. B.Regards from a fellow 737 skipper

@ChrisBrady737

3 жыл бұрын

Hi Daniel, Thanks for your feedback, and for buying my book. Yes I bought a new microphone for these videos after the first few came out way too quiet. Hopefully the sound quality is OK now.

@danielfreifeldtaisen

3 жыл бұрын

@@ChrisBrady737 It is just perfect now. That's great. Keep up the good work with nice presentations. Could u shed some light on how much is minimum OIL quantity for dispatch, I couldn't seem to find it. It used to be 12qts, but we don't have it written anymore (737NG), perhaps make a video about limitations

@ChrisBrady737

3 жыл бұрын

Good idea, I will put it on the list

@ChrisBrady737

3 жыл бұрын

Minimum oil quantity is 60% / 12 US Quarts on the NG. Oil should be added not less than 5 minutes and no greater than 60 minutes after engine shutdown while the oil in the tank is still warm. This will prevent the over-servicing of the engine.

Amazing video! Subscribed! Great content! But I have a question regarding the newer 737s (NG and MAX), So, on all airbus aircraft, i'll use the a320 as an example, you have an ECAM display in the cockpit, which you can select to show you important aircraft information (engine, bleed, pressure, electrics, hydraulics, fuel, APU, air conditioning, door, wheel and flight controls), is there anything like this in the 737 cockpit? Any way to check if your flight controls are functioning ? Or how your hydraulics are doing? Or even which doors on the aircraft are open? I was just thinking and comparing the aircraft (A320 and B737) and then this came to mind, I know that the 787 has something similar to the ECAM, but I am not sure about the 737, thank you.

@ChrisBrady737

2 жыл бұрын

To be use your example, the Airbus family have a systems display (not ECAM) to show how the various systems are functioning. The 737 does not have this but you can indirectly get the same info from the overhead panel. Eg the doors panel will tell you which doors are open.

@ngaviation3489

2 жыл бұрын

@@ChrisBrady737 ohh, thank you very much, I understand.

Chris, at 6:30, would I be correct in assuming that the cream(?) coloured curved box is the APU Air Intake? (behind the red line pointing to the Actuator).

@ChrisBrady737

2 жыл бұрын

Yes it is

I remember a mechanical stabilizer brake (fwd e&e ceiling) that stopped the stab by applying opposite yoke movement on the originals. Does that brake still exist? Thanks for your wonderful series.

@ChrisBrady737

Жыл бұрын

No, that was only in the Originals. 737-200 AMM 27-41-00 A stabilizer trim brake system arrests out-of-trim stabilizer motion when the control column is moved in the direction opposing the stabilizer motion. The stabilizer trim brake is a self-contained mechanical unit, located in the forward nose compartment of the airplane under the aisle control stand. The unit is provided with mounting provisions to be attached independently, and consists of the following rotating shafts: elevator input, stabilizer input, and override input. Classics onwards had a primary and aux stab brake system and a STAB TRIM override switch in the flightdeck.

wonderful what are you doing is SAMPLY wonderful , i have a question are you will make a A/P videos ?

@ChrisBrady737

2 жыл бұрын

Thank you! I will eventually cover automatics

@shadyahmed3715

2 жыл бұрын

@@ChrisBrady737 can’t wait for you capt , if you need any illustrations pictures just ask for it , love to help

@ChrisBrady737

2 жыл бұрын

@@shadyahmed3715 thank you for that offer, I am always on the lookout for photos to illustrate the videos. Email me 👍

@shadyahmed3715

2 жыл бұрын

@@ChrisBrady737 I will

Thank you Captain very very much for this Brilliant Video which contains lots I had been curious about for a long time. And I wonder whether you mind me taking down notes and repost them on other platforms like Bilibili (Chinese version of KZread). It is not that convenient for them to get access to Ytb. I'd be rather appreciated if you could consider that.

@ChrisBrady737

10 ай бұрын

You can as long as you give credit to my work wherever it appears.

@AllNippon927

10 ай бұрын

@@ChrisBrady737Thanks a lot! I will always mention you

Helo sir where is the position of elevator feel and centering unit in wheel well

@ChrisBrady737

10 ай бұрын

It is not in the wheel well, it is in the tail.

@sky-machines9692

10 ай бұрын

@@ChrisBrady737 thankyou very much sir for this valuable information

@sky-machines9692

10 ай бұрын

@@ChrisBrady737 sir its correct position in tail cone access door?