737 Air Conditioning

A detailed description of the Boeing 737 Air Conditioning System
Contents
0:00 Intro & Overview
2:20 Air Con Compartment
8:42 Pack Failures
9:22 Ground Use of Packs
13:26 Ram Air
17:48 Temp Control
28:27 Mix Manifold & Distribution
32:44 Ventilation Rate & fans
40:20 Ground conditioned air
41:53 The Isolation Valve
43:37 Equipment Cooling
46:14 Overboard Exhaust Valve
49:10 Cargo Holds
51:01 Max Differences

[zlatimirzdravkov]

I 'm an aircraft mechanic. Now i work on 737 NG. This presentation and all others your presentation, helps me to better understand systems in this airplane. Thanks!

[ppauloreis]

Chris, these studies has come up a motivation to learn all over again. Your purpouse with B737 aeronautical community is outstanding. Thank you sir!

[Avio]

I can't thank you enough sir. Junior Engineer here taking serious notes. Much obliged

[Travisesty]

I am a AMT for a major airline and I ck/repair/ovhl the PreCooler/PRSOV/HPSOV/High Stg Regulator/High Press Reg/WAI Valve. Chris your video is epic and steller.!!! Helps me as a mech to understand the write up on the unit coming in ie duel Bld light, ovr press light etc. knowledge is power in aviation. THANK YOU Chris for an awesome video Much appreciated!!! Travis

[CarolineWamucii-grym]

Captain Brady, the photos you have included in this presentation have brought me so much clarity 💡 to the countless text materials I have read on this topic. Thank you.

[thomasajita]

Hey Captain, Thanks for the patient and detailed teaching. Much appreciated. Helped me revise the topic. Good luck.

[CyberSystemOverload]

Great presentation as always. What a goldmine your work must be for 737 trainees!

[liamcrabbe]

Thank you for these awesome presentations. Very clearly presented so even someone like me who’s only ever been on a 737 as a passenger can understand. Keep up the great work.

[andrewweir]

5:37 the Primary Heat exchanger has been labelled here as the FWD one, when in fact the Primary Heat exchanger is the Aft one 😳 this can be seen if you follow the ducting from the pack flow control valve round to the aft of the ECS bay to the AFT Heat Exchanger.

[Nipun-ld]

Sir, your videos are a boon for us . Lots of love from Air India .

[jackhurlbut]

This is a very good description of the Air Conditioning Packs of the 737. I will offer one minor correction. The Packs were not a Being design. They were designed for all 737’s, by then AiResearch, which through corporate mergers were at points Garrett, AlliedSignal and as of now Honeywell. They were the “clever ones” that designed the packs to spray water into ram air inlet, but only on the 737-300 and later models. The 727’s and the 737-100/200 just vented it onto the ramp.

[TMaTOS]

Great B737 air conditioning presentation, Chris! Thoroughly enjoyed it, and more importantly, a/c material sticking to my brain...

[RedEye]

As always, Captain Brady, amazing video. I am a visual learner myself, these pictures do speak a thousand words. In terms of bleed trip off light, I guess it's like in a car isn't it? I remember someone telling me if your engine runs hot, turn the heater on and it will ease it up. I have yet to test it. Thanks for sharing this valuable insight!

[jdekong]

Hello Captain Brady, enjoy your videos, the sound quality on this one however is very good compared to the others, you have a very good voice and it’s nice to hear it in full detail 😺

[paulcook]

Thanks Chris!
Loads of great information, lots of new and refresher type stuff.
I liked the cargo hold temps, never knew these, I'll remember in future the fwd cargo minimum is the same as a fridge, but the aft could be touching freezing.
I also liked the explanation of the separation of the flight deck air source.
Too many good tips to mention.
Keep them coming.
Best wishes from Paul.

[ukaszberger]

Thank you for putting so much work into those presentations. Great learning experience.

[Eman.Hoseinee]

Hi . According to the AMM the primary heat exchanger close to exhaust louvers but you said it secondary on track 4:35

[neekoweeclearwater]

Another greatly appreciated video. Very informative and easy to follow

[bankolehammed]

Thanks Chris
For the presentation.I really enjoyed it been very informative and it helps to drive home the knowledge of what I read in the FCOM. Just a note about the Comments that You get best cooling with Packs in Auto and Recirc FANs ON.I find it contrasting with what you get when operating in Middle East region with summer temperatures around 40 degrees.You will need to do the Hot Weather supplementary procedures to get a bit of cooling in the cabin and that requires Both Packs in High.

[sasmsamy]

fantastic work. Very useful regardless of one's level of experience on the type.