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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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By using the speed brake do we reduce the speed or do we increase the descent rate or does both happen simultaneously?

By using the speed brake do we reduce the speed or do we increase the descent rate or does both happen simultaneously? Could someone please explain the concept
Deepak's user avatar
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1 answer
126 views

On the Boeing 737 ND display what does terrain value indicate?

On the Boeing 737 ND display what does terrain value indicate? (e.g. Terr 0016 0032)
Deepak's user avatar
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1 answer
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How does the pressurization system(B737)work if airplane climbs again after descending from the original cruising level?

Does the pressurization system(B737ng) still remain in descent mode?
Dennis Z's user avatar
0 votes
1 answer
74 views

737 ALT DISAGREE Non-Normal Checklist questions

1 choose IAS DISAGREE alert is not shown, and then: 2 Verify all altimeters are set to correct barometric setting. 3 choose DISAGREE alert stays illuminated: and here is the thing, WHY 4 Standby ...
cwcauc's user avatar
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4 votes
2 answers
4k views

Why is this plane flying in circles?

I've been watching this flight after they declared a general emergency and now they are following this oval flight path. Why would that be?
Maddy Gray's user avatar
6 votes
1 answer
123 views

Optimising Continuous Descent Approaches (CDA): Seeking Strategies and Rules of Thumb

Ideally, approaches should be executed as a continuous descent approach (CDA), maintaining idle thrust and only levelling off (or reducing vertical speed to <500 fpm) briefly to reduce speed, while ...
tedioustortoise's user avatar
5 votes
2 answers
1k views

How Long Will Boeing Keep the 737 in Production? [closed]

Due to the immense costs involved in the certification of a new type, Boeing has continued to iterate upon the initial 737 type with the most recent models being the 737 NG and MAX. Will they continue ...
MaddyTEX's user avatar
1 vote
2 answers
94 views

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), ...
tedioustortoise's user avatar
0 votes
1 answer
204 views

B737 during approach the G/s did not capture?

During a recent sim session this happened: ILS radar vectors I armed the approach late initially the aircraft went left and right but it captured the LOC but the G/S was not captured. Could someone ...
Deepak's user avatar
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7 votes
0 answers
127 views

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 ...
Therac's user avatar
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1 answer
136 views

What is the name of the dotted line that shows the predicted turn radius, found on the Navigation display of the 738

What is the name for the white dotted line that stretches out from the aircraft on the navigation display, when the aircraft enters a turn? It shows the aircrafts predicted flight path.
bok1942's user avatar
19 votes
4 answers
7k views

Why did the FAA allow Boeing to self-regulate?

Amidst the Boeing 737 MAX crisis, and finding out after those two fatal crashes that Boeing's 737MAX had been issued self regulation power by the FAA, it has always bothered me, why did the FAA do ...
Gabe's user avatar
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2 votes
1 answer
2k views

Alaska Airlines 737-9 MAX door plug row?

What row is the door plug, that detached during flight 1282, located near on an Alaska Airlines 737-9 MAX?
RockyPooch's user avatar
13 votes
1 answer
5k views

Passenger window insert pops out mid-flight

I was on a domestic flight from DCA to ORD in December on an Airbus A319. I was in row 31 and two rows ahead of me on the left side of the plane, I noticed while deplaning at ORD the passenger window ...
MJBS02384's user avatar
  • 131
1 vote
0 answers
180 views

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 ...
Bohdan Bessonov's user avatar
0 votes
0 answers
115 views

How do you calculate the theoretical vertical speed of an aircraft? [duplicate]

I'm doing this for a High School research paper, so it would be preferable if little calculus is used for any calculations (up to Calculus I is probably okay). This should be based off of the flight ...
Joe Dahl's user avatar
4 votes
2 answers
816 views

What are the standard numbers for fuel consumption (kg), kg/NM, and kg/h, of Boeing 737-300?

I'm currently working on a school project regarding the analysis of Boeing 737-300 fuel consumption. I'm working on some parameters that my supervisor gave me, which are : Total fuel consumption (kg),...
Luthfi Ahmad's user avatar
0 votes
1 answer
114 views

EOSID - Adhere to at or soon after V1?

Most airports have an Engine Out Standard Instrument Departure (EOSID) statement similar to this on their charts: For EOSIDs, the take-off performance for "ABC Airport" is based on the ...
shogunnyan's user avatar
6 votes
1 answer
2k views

Function of door in front of nose landing gear bay on the 737

I've been trying to model a 737 as accurately as possible, and I've seen this door in front of the nose landing gear bay a number of times. I don't know what this door leads to, and I can't find any ...
Israel O. Emmanuel's user avatar
0 votes
0 answers
73 views

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 ...
user38116's user avatar
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6 votes
1 answer
3k views

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 ...
Cloud's user avatar
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2 votes
1 answer
666 views

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, ...
Tough questions's user avatar
-1 votes
1 answer
1k views

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 ...
Max Pierini's user avatar
3 votes
0 answers
154 views

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.
Adel Refa'i's user avatar
1 vote
1 answer
120 views

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 ...
Catuchka6's user avatar
1 vote
0 answers
184 views

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 ...
Kmousa's user avatar
  • 11
2 votes
1 answer
342 views

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?
Tylerb's user avatar
  • 93
1 vote
0 answers
91 views

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 ...
tedioustortoise's user avatar
3 votes
1 answer
557 views

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.
longhaircat's user avatar
1 vote
1 answer
325 views

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 ...
Boeing787's user avatar
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6 votes
0 answers
367 views

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 ...
Deepak's user avatar
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0 votes
1 answer
244 views

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?
Sam's user avatar
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7 votes
2 answers
634 views

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 ...
Nzall's user avatar
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-1 votes
1 answer
172 views

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
Deepak's user avatar
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1 vote
1 answer
172 views

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 ...
tedioustortoise's user avatar
17 votes
0 answers
1k views

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 ...
tedioustortoise's user avatar
7 votes
1 answer
865 views

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 ...
tedioustortoise's user avatar
4 votes
1 answer
2k views

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 ...
dashman's user avatar
  • 243
1 vote
1 answer
237 views

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.
David Drăghici's user avatar
8 votes
1 answer
1k views

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 ...
TooTea's user avatar
  • 277
23 votes
4 answers
7k views

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 ...
Glenn Lane's user avatar
4 votes
1 answer
2k views

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 ...
Vikki's user avatar
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2 votes
1 answer
384 views

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?
Nick A.'s user avatar
  • 21
5 votes
0 answers
320 views

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 ...
Enzo C.'s user avatar
  • 185
0 votes
0 answers
236 views

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 ...
Max Cremona's user avatar
2 votes
1 answer
86 views

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 ...
Adel Refa'i's user avatar
1 vote
1 answer
268 views

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 ...
Samer AlKasaji's user avatar
0 votes
1 answer
292 views

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. ...
Denis Rimskii's user avatar
2 votes
1 answer
304 views

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?
Israel O. Emmanuel's user avatar
3 votes
1 answer
777 views

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?
Stamatis Vellis's user avatar

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