Questions tagged [boeing-737]

A short- to medium-range twinjet narrow-body airliner, originally introduced in 1968. With over 10,000 aircraft delivered and over 4600 on order, the Boeing 737 is the most popular commercial jetliner in history.

Filter by
Sorted by
Tagged with
17
votes
1answer
8k views

What kind of liquid can be seen 'leaking' from the upper surface of the wing of a Boeing 737-800?

Can anyone advise what the liquid seen on the wing of a 737-800 on approach as highlighted on the attached images is? The liquid was seen "pulsating" from the bases marked by the arrows. As the plane ...
-2
votes
2answers
297 views

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

What is the typical fuel consumption of a Boeing 737 in MPG?
5
votes
2answers
2k views

What kind of horizontal stabilizer does a Boeing 737 have?

Does this plane have fixed horizontal stabilizers and elevators or has it been fixed with stabilators instead?
2
votes
2answers
257 views

Why is the B737 altitude display unneccessarily ambiguous?

I was playing FSX again lately and was flying the B737-400. So I hope it is simulated correctly and this question isn't dead on arrival :-) It always bugged me, that the altitude display on the MFD ...
23
votes
10answers
12k views

Why force the nose of 737 Max down in the first place?

Can someone here explain a pretty basic question that I have had ever since this controversy came to light? I don't understand why any aircraft manufacturer, engineer, software developer, would make ...
1
vote
1answer
85 views

Was MCAS part of 737 8 MAX MMEL list?

I think the answer to this question is no, because I cannot find it in the PDF, but I'd like a more expert opinion. The reason I'm asking is the assumption that if it was, its malfunction could have ...
-3
votes
0answers
79 views

approx 737-800 pitch & power settings

Im going to take a sim test very soon.. could you guys let me know about pitch & power settings? prolly im gonna start at 10,000ft and 250kts. the subjects are gonna be like firstly, ...
2
votes
1answer
65 views

Commercial aircraft minimum and maximum climb angle and rate?

Is it possible for a commercial pilot to set a minimal rate of climb - for example, 350' NM climb rate, target heading of 200 degrees and target altitude of 2000 feet above MSL - before getting radar ...
11
votes
1answer
1k views

What is MCAS trying to fix on B737 MAX?

New sources such as Seattle Times and Aviation Week provide a pretty good overlay of the MCAS function on B737 MAX. However, I'm unclear as to the issue that MCAS is attempting to fix. From what I can ...
3
votes
4answers
268 views

What would be the impact of replacing the engines on the 737 MAX, not just reworking MCAS?

There has obviously been a lot of focus on the MCAS failure following from the 737 MAX crashes. However, the MCAS appears to be a compensating control for design decisions, specifically the ...
3
votes
1answer
223 views

Why is this exit indicator placed here?

Some Boeing 737s have this exit indicator in the cabin, attached in a seemingly odd position, next to the overhead bins, instead of in the middle. Why is it placed here?
0
votes
1answer
143 views

Why limit the bank angle to 10° when passing through FL300 on a B737-800?

When passing thought FL300, we are instructed to set the bank angle limiter on the MCP to 10°. I know one of the reasons for this is that we are thrust limited so maneuver capability decreases. Are ...
0
votes
1answer
236 views

Is it possible to land a 737 on an aircraft carrier? [duplicate]

I have seen a flight simulator (X-Plane 11) video of landing a 737 on an aircraft carrier (and stopped). Is it possible to land a 737 in real life? What is the biggest aircraft that it is possible to ...
0
votes
0answers
22 views

Aircraft Registration for 2015 Flight? [duplicate]

Back in 2015, I flew on 4 flights with Delta Airlines. I was too young to remember the registrations of each aircraft. Is it possible to look up the tail numbers if I have the date of the flights, ...
14
votes
1answer
3k views

What is that ceiling compartment of a Boeing 737?

Does somebody know what that big box in the roof of the 737 cabin is?
2
votes
1answer
226 views

When was the Speed Trim System implemented on the Boeing 737?

The Speed Trim System (STS) is a speed stability augmentation system designed to improve flight characteristics during operations with a low gross weight, aft center of gravity and high thrust when ...
3
votes
1answer
76 views

Why do the flap maneuvering speed margins to stick shaker depend on altitude?

Why do the flap maneuvering margins to stick shaker reduce with increasing altitude? Ref: It is written in FCTM of the Boeing 737-800:
0
votes
0answers
48 views

What proportion of the component parts of an 1967 Boeing 737 could be fitted to a model built in 2019? [duplicate]

52 years after the first one flew, Boeing 737s are still rolling off the production lines. What proportion of the parts, whether it's more interesting to measure them simply in number or by mass, ...
3
votes
1answer
123 views

What short-term alternatives do airlines have to replace their grounded Boeing MAX 8s?

The MAX 8 fleet is grounded: what are the other practical aircraft platform options available to AA, SWA or Continental that ensures that ticketed summer 2019 passengers arrive at their destinations ...
40
votes
2answers
7k views

How did NASA Langley end up with the first 737?

This answer shows N515NA, CN/MSN: 19437 as an early 737, and mentions that it may be the first one. Was this a special design built for NASA, or perhaps a prototype that nobody wanted for commercial ...
0
votes
0answers
215 views

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?
3
votes
1answer
297 views

How the stabilizer cutout switch functionality has changed from Boeing 737 NG to 737 MAX?

The Boeing 737 NG has stabilizer trim cutout switches marked as MAIN ELECT (left) and AUTOPILOT (right). Turning off the right switch disables automatic stabilizer trim in autopilot mode and automatic ...
2
votes
2answers
220 views

How much does it cost to ground a B737 max aircraft for an airline?

What are the cost items for which an operator with such an aircraft in the fleet incurs per aircraft because of the grounding of the Boeing 737 max aircrafts and how much is the average cost incurred? ...
5
votes
2answers
229 views

Can the 737 Max autopilot be engaged when some sensors have failed?

If some instruments on the 737 MAX 8 fail on the Captain's side and autopilot stops, can the First Officer engage autopilot (as the instruments on his side are fine)? In the ET 302 crash the Captain ...
1
vote
0answers
41 views

737 ACP GPWS volume control?

So, I was sitting in the front rows of an A320 and could obviously hear the AP disconnect. But I could not hear the GPWS altitude and RETARD callouts. I assume this is because the pilots set the GPWS ...
5
votes
1answer
362 views

Is the 737 Max's AOA disagreement warning light an actual light?

The New York Times article Boeing Believed a 737 Max Warning Light Was Standard. It Wasn’t. includes the following: When Boeing began delivering its 737 Max to customers in 2017, the company ...
13
votes
1answer
623 views

Why is the 737 so low?

Why does the Boeing 737 sit so low on its wheels compared to the Airbus A320?
1
vote
3answers
386 views

How does MCAS compare to stall protection systems installed in other aircraft? [closed]

How is MCAS in 737 MAX 8 different from the stick pusher in MD80 or DHC8 and from the Airbus alpha protection, in terms of overall safety? All these systems will push the nose down at high AoA and ...
16
votes
4answers
14k views

Are Boeing 737-800s grounded? [duplicate]

I’m flying on a WestJet Boeing 737-800 from Honolulu to Vancouver and then on to Toronto in July, returning on the same type of aircraft in August. Are these aircraft still grounded and are they ...
3
votes
1answer
315 views

Who controls the cabin air temperature?

I understand the B737-800 has two air conditioning packs that handle the temperature of three zones: the cockpit, the fwd cabin and the aft cabin. I understand that which pack is turned on is ...
11
votes
2answers
2k views

Can stored/leased 737s be used to substitute for grounded MAXs?

The 737 MAX was introduced relatively recently. I would have assumed they were replacing at least some older 737 models in operation with the major airlines that took them (eg Southwest, American, ...
1
vote
2answers
141 views

What is the THS deflection speed?

Let's restrict this question to best sellers airliners (A320 and B737). On this aircrafts, the THS is used for pitch trim. The speed requirements may not be has intense as for elevator as it control ...
0
votes
1answer
122 views

How to disable GPWS in a 737NG just like how the Airbus can?

The Airbus planes have a feature where the GPWS can be disabled. But I cannot find any switch in the 737NG cockpit to disable the GPWS.
12
votes
2answers
653 views

What do you need to do to bring a 737 Max back in service after 6 months in storage?

What kind of maintenance has to be performed on an aircraft if it has been stored for 6 months? For example, do fluids need to be changed, have the tires become flat, etc.
0
votes
3answers
2k views

Could the Boeing 757 replace the Boeing 737 Max 8/9/10? [closed]

The "Baby Boeing" 737 started life in the 1960s with roughly half the thrust and around 60% of the weight as the 757. In stages the 737 grew into a capacity squarely in the range of the 757. ...
7
votes
2answers
1k views

Which models of the Boeing 737 are still in production?

The BBC is reporting that the production of 737 aircraft has been reduced from 52 to 42 per month due to a loss of 737-Max orders. It isn't clear in the report whether the Max is the only 737 being ...
2
votes
1answer
240 views

What does the preliminary report on the Ethiopian B737 MAX accident show? [closed]

In early April the Aircraft Accident Investigation Bureau of Ethiopia released a preliminary report on the crash of Ethiopian Airlines flight 302 that happened on March 10, 2019. There apparently is ...
5
votes
1answer
293 views

Is a FAA certified plane allowed to fly everywhere in the world?

Following the debate about FAA and Boeing certification practices, I was wondering whether Europe could potentially require the Boeing 737 Max to be certified by a European agency. Is a FAA ...
15
votes
2answers
4k views

Why are the 737's rear doors unusable in a water landing?

The 737's rear exit doors cannot be used to evacuate the aircraft in the event of a water landing, as shown, for example, in this safety card: (Image from flight-report, via Jordy here at AvSE.) In ...
4
votes
2answers
537 views

Why can't the 737 MAX's horizontal stabilizer autotrim be cut out by control yoke inputs?

According to this article, a horizontal stabilizer runaway on the 737 MAX, unlike with all other 737s, cannot be countered with yoke inputs: Older 737s had another way of addressing certain ...
3
votes
1answer
196 views

Can airlines choose whether or not to enable MCAS on their fleets, and if so, have US airlines chosen to do so?

I've been told that, although all 737 Max aircraft are equipped with MCAS, the system can be deactivated by the individual airline. I've also heard that US airlines never activated MCAS in their 737 ...
6
votes
2answers
3k views

Did A320 NEO need an equivalent to 737 MAX MCAS because of its bigger engines?

We read that MCAS on the Boeing 737 MAX was needed because of the new, bigger, heavier engines of the MAX compared to the previous 737 versions. The closest equivalent to MCAS on the Airbus A320 NEO ...
6
votes
4answers
2k views

If the updated MCAS software needs two AOA sensors, doesn't that introduce a new single point of failure?

Regarding the 737 MAX story, the New York Times writes: "Boeing’s software update would require the system to rely on two sensors, rather than just one, and would not be triggered if the ...
1
vote
0answers
249 views

Why do the in house Boeing 737 max tails have a drag chute? [duplicate]

In the recent videos of some in-house (tagged as Boeing instead of some airline), at the top of the aircraft's tail, there is a rope with a small drag chute attached to it. What is the purpose of this?...
3
votes
0answers
82 views

How are these flywheel-like devices used in the Boeing 737 Max? [duplicate]

The recent news video CNN's exclusive look inside a Boeing 737 Max simulator shows a 737 Max simulator cockpit. There are a pair of what look like large black flywheels on the console, shown spinning ...
3
votes
0answers
57 views

Is it possible to selectively deactivate alarms? [duplicate]

My question is restricted to Airbus an Boeing's best sellers, namely the A320 and the B737. If relevant, answer can be extended to other types. In those aircraft, there are multiple possible alarms (...
7
votes
3answers
684 views

Has the Boeing 737 MAX MCAS system successfully prevented a stall or approach to stall condition outside testing?

The Boeing 737 MAX MCAS system has been in the press a lot as it has been implicated as a possible cause of 2 fatal crashes. The MCAS system was put in to prevent a wing stall caused by excessive ...
0
votes
2answers
543 views

Is the physical MAX8 design bad because software is required for the aircraft to stay airborne? [closed]

I'm not an aviator by any means, but one thing that has come up in recent conversations with friends is that the MAX8 is inherently unsafe because alone, unpowered, the craft is not 'aerodynamically ...
0
votes
1answer
136 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 ...
5
votes
2answers
353 views

Why do the stabiliser trim wheels not move exactly in sync?

I've watched a few videos about the Boeing 737, and in particular because it's a bit of a current topic, about the stabiliser wheels in the cockpit. On some of these videos, which are often in ...