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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428 views

The AFDS and A/T do not control to a speed which is less than minimum speed for the current flap configuration?

The AFDS and A/T do not control to a speed which is less than minimum speed for the current flap configuration. This speed is approximately 1.3Vs. Minimum speed, FMC speed, or selected speed, ...
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137 views

Is it possible to define a “good landing” in terms of pitch angle and vertical speed?

Is there a specific combination of pitch angle and vertical speed at touchdown that would be usually be considered a "good landing" in a B737NG?
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What materials form the structural elements of the Boeing 737?

What materials form the structural elements (leaving the spars, ribs etc) of the B737? It was tough to get any information on the kind of composites used on the 737 structure. Hoping to get some ...
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163 views

What happens when an aircraft type is grounded while in flight? [duplicate]

Over the past few days, many countries have decided to ground the 737 MAX. Among these, several have also decided to deny passage to the affected models through that country's airspace. How does this ...
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699 views

What is the optimum speed for takeoff flaps?

I took a 737 rating written test yesterday and one of the questions was: What's the optimum speed for takeoff flaps? V2 V2 + 10 V2 + 15 V2 + 20 Anybody knows the answer? I did some research and ...
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574 views

How the antenna on the B737 Max fuselage doesn't disrupt the airflow? [duplicate]

As the title already say, how does the antenna on the Boeing 737 Max fuselage not disrupt the airflow? (Boeing) 737 MAX antenna.
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127 views

When do the LNAV and VNAV NPS pointers appear in the PFD of a B737NG?

I am pretty sure the LNAV NPS pointer should appear from after takeoff, if LNAV is armed. But I am not sure about the VNAV NPS pointer. A VNAV climb is based on Speed, not Path, so I assume there is ...
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294 views

What are the names of the antennas which I have marked in this picture of a Boeing 737?

I have taken the picture from PMDG 737NGX Microsoft flight simulator X. I am really curious to know what this antennas are. These antennas are behind the nose gear.
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What's this prominience in the B737? [duplicate]

I have recovered some spotting pictures that I made long ago and I came to realize an upper prominence in the fuselage of this Norwegian Boeing 737. I don't remember to have seen it in other 737s. ...
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238 views

What physical hardware does all the avionics on the B737NG run on? Some processor from the 1980s? Or some new and improved chip?

So, I am a tech guy and likes to fly (in sims) so, I was wondering what physical hardware powers all the 737NG's avionics and related systems (PFD, MFD, EICAS, GPWS etc). Is there an answer to this?
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154 views

Is it normal ops to dispatch an airplane after a stick shaker was on throughout the previous flight (Lion Air 610)? [closed]

I've been studying Figures 5 and 7 of the Lion Air interim report and cannot understand why the airplane was dispatched on the "Loss-of-control" flight when the Left stick-shaker was on throughout the ...
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Has the number of angle of attack sensors been reduced in Boeing 737 Max, in comparison to the older models?

Boeing 737 is flying since 1967. I would like to know first how many ' angle of attack sensors' does it have, and has they number been reduced for Boeing 737 Max, in comparison to the older models ...
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Does the Autopilot switch to ALT ACQ mode at a fixed altitude difference from target altitude?

For example, if climbing (or descending for that matter) at 3500 fpm, will the AP switch to ALT ACQ mode at the same point it will as when climbing or descending with 1000 fpm? Or does the point of ...
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176 views

Is using a DERATE for Takeoff actually reducing the power of the engine?

When one chooses a DERATE for takeoff (TO-1 or TO-2 in the case of a B737), does the system actually reduce the available thrust of the engines, or is it computing a N1 that corresponds to the reduced ...
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118 views

Referring to the B737NG, at what point (height) does a TOGA revert to LVL CHG after the takeoff?

If one takes off with HDG SEL armed and no vertical mode (like VNAV) armed, at what height (AGL) will the vertical mode switch from TOGA to LVL CHG, and what will be the IAS applied? Also, why isn't ...
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How is the B737NG Autopilot controlling pitch?

In particular, does the Autopilot in a B737NG control the pitch only via trim adjustment, or first via the elevators and then trim?
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Should “Thrust Reduction” and “Acceleration” heights be the same for the Boeing 737 NG?

Should the Thrust Reduction height be the same, lower or higher than the Acceleration Height? In other words, what is their "correct" sequence. I am referring specifically to the B737NG, if ...
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201 views

What is the takeoff thrust of a CFM56 engine?

So, to be more clear I currently have an assignment about the Boeing 737-800. I have to find out the total takeoff distance of the aircraft. I'm using Anderson's book " Aircraft Performance and ...
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480 views

Is the in flight emergency manual of a Boeing 737 Max 8 available to read online? [closed]

I frequently read about pilots going through manuals/checklists/procedures in an emergency situation in an airliner while in flight. Is there an online resource where the public can actually read it, ...
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113 views

Which system on the 737NG decides the use of roll spoilers?

Which of the 737NG systems decide to use roll spoilers? FMC? Some other flight surface controller? Does it trigger when airspeed is low?
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What is the wire running from the CG to the tail? [duplicate]

I was looking at airplanes a while back and noticed that there is sometimes a wire running from about the CG near the wind to about halfway up the tail. I see this more on 737s but I have also seen ...
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Is the B737NG AoA indicator a “normalized” indicator?

Is the B737NG AoA indicator, when/if it exists, an indicator of "normalized" AoA, or does it indicate the actual AoA measured?
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On the B737 FCTM, what are the limit values for strong and gust definitions?

There are definitions called as "Gusty and Strong Crosswind Condition" related to takeoff thrust setting choice and "Strong Crosswind" in touchdown in crab part of B737NG FCTM. I ...
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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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How does Boeing Deliver single aisle jets to South east Asia? [duplicate]

I am not sure if they can fly on full tank gas to their destination (say India or Thailand), but how does Boeing deliver single aisle jets to these destinations. I read somewhere about the process of ...
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Why Boeing 737 main landing gear wells have no doors? [duplicate]

My question is about the Boeing 737 main landing gears: When the landing gears are up you can see a landing gear door to open in most planes and then it closes. But for Boeing 737 main landing gear ...
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264 views

What are the aerodynamic differences between the nose designs of the CSeries and the Boeing 737? [duplicate]

The Bombardier CSeries and the Boeing 737 are two aircraft in the same class. Their nose shapes are very different from each other though as can be seen in these two images. What are the major ...
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221 views

What role do the winglets on the next-generation 737 play? [duplicate]

I've flown on a couple of 737's recently and noticed that the wings are quite beautiful and have a distinctive upward sweep at the wingtip, almost like a vertical stabilizer. What advantages and what ...
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335 views

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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9k views

What is the typical fuel consumption of a 737 in MPG?

What is the typical fuel consumption of a Boeing 737 in MPG?
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How can a runaway trim become so difficult to fight when all a pilot has to do, is “grasp and hold?” [closed]

and how can you even tell the pilots did “grasp and hold” during an investigation? Is it determined based off what they say?
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Is this a 737-800 or 737 MAX 8?

Is this a 737-800 or 737 MAX 8?
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Why did Boeing choose for a solution as aerodynamically invasive as MCAS to solve a much less safety related issue? [closed]

Why would Boeing, or anyone, ever jeopardize the aerodynamic integrity of an airliner, just to change the way a pilot feels the controls? The more I learn about it, the clearer it becomes that that is ...
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Is there any difference between the Boeing 787 and the 737 MAX? [closed]

I've just done some research on the Boeing 787 and the 737. But the 787 and 737 MAX seem almost completely alike. Are there any differences between the 787 and the 737 MAX?
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What programming language(s) is Boeing's MCAS written in?

What language is Boeing's MCAS written in? Thanks

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