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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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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Boeing 737-800 Source Off Light and Flight Director Bias Out Of View Function
I have seen the following occur during simulator events. With a left Source Off light illuminated and the captain's autopilot and autothrottles engaged (or re-engaged):
Captain's flight director ...
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What older regulations and exemptions does Boeing's 737 line benefit from?
Boeing is occasionally accused in the press of keeping the 737 competitive by being able to avoid newer regulations and standards, either through being previously certified or by other means.
The ...
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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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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 much does a Boeing 737 wing bend/deflect in cruise conditions?
As a part of my ongoing research of a structural joint analysis of a Boeing 737, I have been looking for sources where I may be able to find the bending/deflection data during cruise conditions. I ...
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What are the locations on the Boeing 737 wing where the airfoil changes?
I would like to know where along the span of the 737 (let's say the NG) wing the two midsection airfoils are used. I am planning on running a CFD analysis of the 737 wing, and I need accurate data.
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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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What is the absolute ceiling of a 737-200?
We're trying to find the official absolute ceiling for the 737-200 for a school project. So far have only been able to maximum and service ceilings for this craft. Can anyone point us to the correct ...
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Wing and horizontal/vertical tailplane airfoil type and relative thickness?
I've been searching for data on the airfoil type (namely if they are supercritical, aft-loading etc.) and relative thickness (average or in different positions) of the empennage (both horizontal and ...
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Why can't you operate packs on HIGH during take-off, approach and landing on a 737-800?
It's in the FCOM Limitations Chapter and I think that these phases are critical phases of flight and I don't want to reduce my engine performance by purposely creating a high demand for bleed air from ...
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Does the 737 MAX's engine nacelle camber affect the pitching moment?
A side view of the B737 MAX's engine nacelle shows a positive camber at the top. As nose camber of any lifting shape (wing or nacelle) generally allows more lift at higher AoA, do you think this ...
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Is the Boeing 737 unusually susceptible to stress fatigue?
According to this Newsweek article - which seems like a reputable source - the FAA has issued a number of Airworthiness Directives to address stress fatigue concerns with the 737NG series:
Between ...
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The role of accurate DES FORECASTS for descent planning in VNAV, during the latter stages of an approach
Giving an accurate set of criteria in the “DES FORECASTS” page of the FMC helps produce an accurate descent path.
Typical Descent Profile, Vertical Path
Adjusting the “TAI ON/OFF” (Thermal Anti Ice), ...
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LPV, WAAS/EGNOS and GLS in 737 NG
As far as I understand, there are mainly 3 types of RNP approaches:
LNAV/VNAV - we have a set of fixes with altitudes and flying it
LPV WAAS/EGNOS - same as 1, but aircraft use special receiver ...
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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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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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Does the Flight Acquisition Unit on the Boeing 737 NG stream data?
I noticed on B737-800 entering the flight deck on the right side there is a port Data Loader and I think this is the Flight Acquisition Unit.
Is this port used exclusively for loading data to FMCs etc ...
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How many flight control shutoff valves are there in Boeing 737?
I came to know from a source that there are total 6 flight control SOV 3 of which associated with each of system A and B hydraulic system .but in 737 FCOM under stand by hydraulic section in schematic ...
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For the recertification flight(s) of the 737Max, will the FAA want to see a live runaway stabilizer?
With Boeing ready to start the testing Monday, will the FAA want to see a simulated runaway trim failure in flight?
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Was the speed trim system on the B737 Classic modified to counter increased thrust?
How much additional thrust did the 737 classic generate compared to the original 737? Was the speed trim system added to counter the additional thrust?
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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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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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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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Where do I get the latest 737NG FCOM?
So, I went online to search for the 737 FCOM, but I can only get the FCOM from 2005. Is there a 2019 version? An updated version?
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Why is the ISOLATION VAVLE switched to OPEN during ENGINE START on Boeing 737?
As the SOP says in Preflight Procedure – First Officer:
"ISOLATION VALVE switch – OPEN"
In this way, when engine starts, the ISOLATION VALVE is OPEN not AUTO.
The PACK valve is switched to ...
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