Questions tagged [boeing-737]
A short- to medium-range twinjet narrow-body airliner, originally introduced in 1968. With over 10,500 aircraft delivered and over 4500 on order, the Boeing 737 is the most popular commercial jetliner in history.
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Do aircraft depressurise when taking off from a high elevation airport? [duplicate]
A jet aircraft generally maintains a cabin pressure of 7000-8000 ft during cruise. If the aircraft departs from a high elevation airfield, such as Quito (approx. 10,000ft), will the aircraft ...
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How big would a single propeller need to be on a 737?
If you wanted a 737 to have the same design as a single prop light aircraft (i.e. just one prop on the nose, no turbines, APUs or other engines) - how big (and how fast) would the propeller have to be ...
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Why are only flaps 5,10,15 recommended in windshear operations during B737-800 takeoff?
During takeoff in a B737-800 when there is predicted wind shear you can only use flaps 5,10 and 15.
Why is this? If possible to provide a reference for it.
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Why 737 NG Flight Director need to be Recycled?
When FD switch is on, FD is on.
When FD switch is off, FD is off.
But when FD switches are recycled, FD switch on, but FD bars are not shown during approach. Is this due to approach FD logic? If so, ...
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Height from the ground of aircrafts doors
I'm searching for the height from the ground of these AA/CC doors (front and back)
Boeing 737-800
Boeing 737-8200 (800-max)
Airbus A319
Airbus A320
Airbus A321
Airbus A220
Airbus A340
I know only ...
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Why does stall warning system require 4 minutes of AC power on the 737NG?
Is it related to the Stall Management Yaw Damper (SMYD) computers starting? But the number 1 stall test is working with no need for waiting.
Please provide sources, if available.
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P-8A Poseidon Airfoil type
Could someone help me find out what airfoil type is used on the P-8A Poseidon symmetrical, conventional, thin or supercritical airfoil?
It seems to be, that the Boeing 737-800, like many commercial ...
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B737-800 wire routing path diagrams
I was wondering from where can I get screenshots of the aircraft internal fuselage without wall or ceiling panels showing the manufacturer wirebundle routes and ground terminal blocks like the pic ...
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Are auxiliary fuel tanks optional on the Boeing 737 Max 9?
Does the Boeing 737 Max 9 have auxiliary fuel tanks like the Boeing 737-900ER? And have any airlines ordered them without if optional?
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Mode S Transmission from Boeing 737 Integrated Standby Flight Display (ISFD) data?
During a recent flight, while in communication with London control*, we received a query about our RVSM (Reduced Vertical Separation Minima) compliance. Both the Captain's and First Officer's ...
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Where on the aircraft are transponders mounted?
For civil acft like B737-800 or B777-200, where is the location of transponder?
I'm asking about the "responder", not the cockpit device.
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Why some airliners have autostart and others don't?
So some of the more modern FADEC equiped planes (specifically airliners like the 787) have autostart and will self monitor the engines during startup. The one thing that confused me was how a 747 ...
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Why do the spoilers on the 737 only deploy to the flight detent after a flaps up landing?
Following an all flaps up (no flap) landing, the SPEED BRAKE
lever will not move beyond the FLIGHT DETENT and the spoilers
will not fully deploy (for reference this is stated in the Fcom 9.20.14 rev ...
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Could what happened to Yeti Airlines Flight 691 happen on an Airbus or Boeing?
The Yeti Airlines crash involved an ATR 72 and was likely due to pilot error - a stall resulting in an incipient spin.
Would this accident be more avoidable on say a Boeing 737 or an Airbus A320?
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Do pilots still not need additional simulator training to fly the 737 MAX?
Boeing added the MCAS system to the 737 MAX so pilots didn't have to go through expensive simulator training to get used to the changed flight profile caused by the engine redesign. Do pilots still ...
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On the B737 When A and B systems are pretty much each other's back up for most things Why not for flaps? [closed]
Why have a seperate system for flaps? Which is alternate flaps
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Are Pitch Attitude and %N1 values for single-engine flight provided in the Boeing 737 Documents, or are pilots required to rely on “rules-of-thumb”?
In the Boeing 737-700/800 Quick Reference Handbook (QRH), the section titled "Performance Inflight - QRH" provides Pitch Attitude and %N1 values for various weights and pressure altitudes ...
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What causes the "dead band" phenomenon during takeoff on the Boeing 737?
During takeoff, the Boeing 737 encounters a distinctive "dead band" phenomenon after the initial pitch reaches approximately 10 degrees. Essentially, a slight increase in back pressure is ...
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Why did autopilot switch to CWS P on a LNAV/VNAV approach, and why didn't it reduce descent rate to comply with CDU alts when VNAV was re-engaged?
We were performing an NDB approach the other day due to the ILS being unserviceable.
We are flying a 737-800, FMC Update 14.0 (“common VNAV”)
We were using LNAV and VNAV as our roll and pitch modes ...
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Boeing 737 takeoff config question
On the Boeing 737, what's the difference between taking off in LEVEL CHANGE or no vertical mode selected (i.e. both LEVEL CHANGE and VNAV button blank on MCP).
I realize in both the MCP speed window ...
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Which airfoil is used on the Boeing 737 NG vertical stabilizer/rudder?
Does anyone know what airfoil Boeing uses on it's 737 NG's vertical stabilizer or the rudder itself? I can't seem to find the info anywhere and I need it for a university project.
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What does this switch on Boeing Sky overhead bins do? Why is it always set before taxi?
The pivoting overhead luggage bins in the Boeing Sky interior have a tiny switch/lever on one side. In my experience, cabin crew always flips this switch on every single bin (as indicated by the arrow ...
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Is it permitted to fly a 737-800 with one pilot?
A 737-800 was scheduled to leave from a Canadian airport to Mexico, but was delayed: the airline said the reason was that one of the pilots called in sick. As a workaround, the airline flew the plane ...
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How is the 737 NG/MAX able to operate at a pressure differential greater than that at which the cabin-pressure relief valve operates?
So I was reading about the 737's cabin-pressurization system, and then I came across these two bits of information:
Limitations
Max differential pressure:
Series
Max Diff
1/200's [sic]
7.5psi
...
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Do the trim wheels on the Boeing 737NG move by themselves during the takeoff roll?
After the stab trim is set before take off, will it move by itself during the take off roll? If yes, why? Where can I find the reference?
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Why is this placard on a Boeing 737 NG?
I was working on the cockpit of a Boeing 737 and was intrigued when I saw this placard. From what I know this has to do with Citibank being a lender or something along those lines.
Why would this be ...
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How heavy and expensive are batteries and generators on a 737?
I am currently struggling to find details on generators and batteries. For a B737 or similar, what would the cost and weight (in £ and Kg) of a battery and IDG be? And do lightweight options exist or ...
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Does the battery discharge detector have a self test function on the B738?
Does the battery discharge detector on a Boeing 737-800 have a self test function that causes the light (BAT DISCHARGE) to illuminate and extinguish?
I have not found such a thing in the FCOM but been ...
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How do you clean B737 Wheel Wells?
just wondering, is there any tools used to clean main/nose landing gear bay? I was thinking some machine with steam water or hot water high pressure and solvents.
wondering what is the best cleaning ...
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Sudden "nose-down" event during a normal flight in normal weather conditions
I had a flight scheduled from WAW to KIV on LOT airlines. The boarding pass told they changed the aircraft to a 737 MAX. When I saw that I've immediately remembered that whole MCAS story from 2018.
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What is the purpose of this box behind the yoke on a 737?
I was looking at the 737 cockpit when I found this apparatus behind the yoke. I have never seen it before and I have no idea what is does. Can anyone help me?
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Exactly when do the ARMED Speed Brakes extend after landing a B737-800?
When do the armed speed brakes of a B737-800 extend after landing?
Is it when the main gear makes contact with the ground, or must the nose gear also be on the ground?
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At what elevation is the airfield considered a high elevation field for takeoff and landing for 737-8?
At what elevation is the airfield considered a high elevation field for takeoff and landing for 737-8 ?
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What is that green dashed circle on ND?
I think this is a navigation display from a boeing aircraft
I searched around the internet for the meaning of the "green dashed circles" but got nothing.
Thanks in advance for your answers!
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At what point does a turboprop become more fuel efficient than a jet engine in large commercial aircraft?
Is there a formula that can be reliably used to determine when turboprops become the better option for domestic flights in a plane similar to a 737 in capacity and size? Also could this formula be ...
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Where to find out the correct values of AOA of Boeing 737 during different phases of flight?
We can say that practically there are minor differences in AOA for each flight (in the same range of weight). But is there any document that states what flight angle is recommended for each of the ...
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What happened to the engines on takeoff here (loud popping sound then silence) [closed]
What is the cause of the sound shortly after rotation in this short video?
And does anyone know what flight this was and what happened? (i.e. incident report) as I can't find any news about a fatal ...
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What would be the lowest possible cabin altitude (respectively, highest possible pressure on board) of an airliner in 1155 Pa exterior pressure? [closed]
How well does an airliner's pressurization work at extremely high altitudes (extremely low atmospheric pressure)? Does the system provide an absolute pressure differential, or is the differential a ...
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Why would the 737 autopilot A disengage without engine-driven hydraulic pump during heavy demand?
Note: Loss of the system A engine-driven hydraulic pump, and a heavy demand on system A, may cause A/P A to disengage.
Just finding it difficult to understand why the A/P would disengage in this case....
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What is the OUTBD PFD setting on the 737 NG MAIN PANEL DUs switch?
Each pilot on a Boeing 737 NG has a five-position switch labeled MAIN PANEL DUs that selects what appears on the two main display unit panels in front of her. Here's a picture of the left pilot's ...
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Did Helios Flight 522 take off with its pressurisation mode selector in manual? [closed]
I'm currently doing a write up on the Helios Flight 522 disaster. Full disclosure, this is a journalistic piece, and I'm not an aviation expert.
I'm many hours in at this point and most of it so far ...
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Could the pilots really not trim manually to overcome MCAS, as shown in the Netflix Downfall documentary?
In the recent Netflix documentary, a claim is made that once MCAS activated, after several activations, the pilots physically could not trim the aircraft due to the speed and pitch.
Is this true? I ...
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How do one "force" VNAV climb mode through a set altitude constraint?
Let's say I'm flying out of EGPH, there is a first altitude constraint at 6000ft automatically set by the FMS. After departure, I will engage my VNAV to climb on profile.
VNAV will hold at 6000ft no ...
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Does the 737 have a higher aspect ratio than most later 7X7's?
In this video:
The Insane Engineering of the 787
there's a chart (at around 10:40 in) which shows that the 737 (which series?) has an aspect ratio of over 9, while the 747, 757, 767 and 777 rise from ...
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What is this sound on a B737-800 Takeoff?
Does anyone know what this sound is at 12:56 on a B737-800 takeoff?
The aircraft is N822SY, the airport is Denver Intl. Airport, and the runway is 34L.
Thanks and have a great day!
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What are these white drops on the exhaust plug of a CFM56-7B engine?
Does anybody know what those white dried-up drops are?
I checked out another Boeing 737-800 on the ramp and it also had the same defect so I'm guessing this is a common issue, or is it?
This shows up ...
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How to monitor MSA sector from an RNAV waypoint in the 737?
For instance, at Manchester (EGCC) the approach procedure for RNP 23L has the MSA based off of RNAV waypoints; DOMIG bearing 142 to 322, OSNAP bearing 322 to 052, TINVA bearing 052 to 142.
From NATS ...
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What's the type of screen for the PFD/ND on the 737?
What's the type of screen used on the Boeing PFD and ND displays?
It doesn't seem to be LCD - because for one they didn't have them when these planes were certified and the resolution seems to be so ...
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Can a Boeing 737-800 make a smooth landing on a 7000-foot runway?
I recently flew on an Avelo (brand new airline) Boeing 737-800 to KBUR, 6886’ x 150’ runway. It was a VERY rough touchdown, the braking system made a lot of racket, and our foreheads hit the seats in ...
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Why doesn't the 737 MAX have an APU EGT gauge like all other 737s do?
On Original, Classic, and Next Generation 737s, the APU panel has an EGT (exhaust-gas temperature) gauge below the four APU caution/warning lights (all images in this question are from the 737 ...
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