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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41 views

What is the difference between Level Change and ALT INTV during VNAV descent?

I'm confuse between the two. During descent for 737 PMDG, I usually set the altitude via ALT INTV, but sometimes the plane doesn't response to ALT INTV but response to LVL Change instead. Need help to ...
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How to fly an RNAV (RNP) approach with VNAV in a Boeing 737?

Let us assume you are flying a B737NG and you are cleared for an RNAV (RNP) approach which has several legs with different altitude crossing restrictions. What do you enter in the MCP altitude window?...
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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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Why isn't the wing span of a certain airliner longer with the longer fuselage versions?

The Boeing 737 next generation models (700,800,900ER) all have the same wingspan at 117ft 5 in. Why doesn't the wingspan increase with bigger and longer models? With the 737-900 wouldn't you need a ...
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Can the Landing gear be lowered when system A hydraulic pressure is lost in Boeing 737?

In the FCOM OF BOEING 737 HYDRAULIC SECTION I went through the part Landing gear transfer unit that it is used to raise the landing gear at a normal rate when system A EDP volume is lost. My query is ...
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How controllable is the 737 in single-engine manual-reversion flight? Is it controllably landable (or go-around-able) in this condition?

The 737 is practically the only civilian jetliner still in production1 to have provisions for flight-control manual reversion; in the event of a total failure of the A and B hydraulic systems, the 737’...
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382 views

What material is the B737 wing skin made out of?

What material is the B737 wing skin made out of? I actually couldn't find much information on the wing skin upper and lower panel materials for the B737, the general guess is of course aluminium, but ...
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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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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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Will the 737 Max 10 have MCAS?

With the fuselage plugs forward of the wing, would this mean the engines are closer to CG, therefore no need for MCAS?
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What is the technique or procedure to disable/disengage the MCAS on Boeing 737 Max 8 & 9 Aircraft? [closed]

With regard to the recent crashes involving the Boeing 737 Max 8 aircraft, where according to preliminary reports, it appears to be related to the MCAS, which is a safety system that pushes the nose ...
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How can I find out how much a passenger window of a Boeing 737 costs?

Where do I have to look to find out how much a passenger window of a Boeing 737 costs?
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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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Can 737NG GPWS and other warning voice lines/sounds be played in headphones instead of cockpit speaker?

I watched a couple of cockpit videos on the 737NG landing, and I noticed GPWS in some of the videos does not announce 500ft, 400ft, 300ft, etc. Does this mean the pilots have routed these sounds into ...
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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 ...
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On the 737 MAX, can the pilots switch to the backup MCAS, or switch active MCAS input to another AoA probe during flight?

According to this article, my assumptions about the Boeing 737 MAX flight control system are (please correct me if I am wrong): The aircraft has two flight control computers (FCC) The aircraft has ...
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Why do the 737-100's JT8Ds, and no others, have suck-in doors?

Of the various use cases of the Pratt & Whitney JT8D (the most-produced low-bypass turbofan in history, and the second-most-produced turbofan of any description1), those installed on the 737-100 ...
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Does a Boeing 737-800 Have a Ram Air Turbine (RAT)?

I am travelling with Thomson on a Boeing 737-800 and wondered if it had a RAT?
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Can I act as SIC with these specific type ratings?

Can I act as SIC on a part 91 ferry flight, if I hold... a DC-9 type rating and the flight is in an MD-80? a B-737 type rating, can I act as SIC on a B-737NG?
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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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2answers
208 views

Are 737 pilots required to train in manual-reversion flight?

All jetliners prior to about 1970 had flight controls that could, if need be, be manually operated without the use of any hydraulics: Some, such as the DC-9, had manual flight controls with hydraulic ...
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Can the VNAV Path angle be modified in a Boeing 737 NG?

In the Boeing 737 NG series, can the usual 3 degrees Path angle used for VNAV Descent be modified through the FMC to another angle?
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What profile will a Boeing 737 NG follow after pushing the ALT INTV button?

If one uses the ALT INTV button during a Climb or Descent in the Boeing 737 NG on the MCP, what profile (Speed/Path) will the AP follow in such a climb and/or descent? Is it the same as programmed in ...
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What is the ALT INTV on the 737's autopilot?

So, I was watching a quick tutorial on the FMC on YouTube. The FMC somehow had a 5000 ft restriction, and the guy got clearance to go higher up, and he set his altitude on the AP panel, and he pressed ...
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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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Aircraft belly fairing or body-to-wing fairing dimensions?

Does anyone know the dimensions of the Belly Fairing for an aircraft model B737 and A320? I am trying to find this on the internet but this information is hard to find it. Thank you
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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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Can a 737NG still fly when every single electric run device/system is dead?

So, as my title suggest, I wonder if the 737NG can still fly without any of it's electric run systems, which means anything that runs on electricity is dead.
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How much freight can a Boeing 737-800 NG carry if the majority of seats are removed?

In the context of the COVID-19 crisis, I read reports of underused Boeing 737-800 NG aircraft being converted (by technicians in airports, not by factories) to cargo planes for medical equipment. How ...
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Left hand seat, is it so important?

With reference to this article on aviation herald at Accident: Shanghai B738 at Shanghai on Jan 3rd 2020, tail strike on landing, captain and first officer swapped seats in flight where the report ...
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Why does Boeing use a trim wheel in the 737 and not their other products?

Why does Boeing use a trim wheel in the 737 and not any other products? Is the trimmed state for the 737 just more important than in the 777? Or even 747? It gives the impression that a secondary ...
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Why do the GS and LOC indicators blink?

So, the question is in the title. Specifically referring to this video. At around timestamp 2:10 in the video, you can see the GS and LOC indicators blink. Why does it blink?
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What is this instrument above the EGT in the Boeing 737?

I would like to know what is this instrument that is above the EGT of the Boeing 737. What does it indicate?
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How did this flydubai 737NG get Max winglets?

I’ve seen this one on my way to the office in DXB. It’s clearly equipped with paired MAX winglets, however the engines are not curly. So judging by symptoms it’s not MAX. Was filming from a car, hence ...
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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 are the 737's variable-speed generator drives so unreliable?

The 737 has three different possible styles of engine-driven generators, distinguished by the generator's drive mechanism: the constant-speed drive (CSD), variable-speed constant-frequency drive (VSCF)...
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Why does the 737NG EGT drop during take-off?

I noticed that the EGT drops a bit when I hit TO/GA for take-off on a 737-800.
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Is it possible to do a barrel roll in a large aircraft like a B737?

Can the bigger planes like B737 do barrel rolling kind of stunts like fighter jets do? I'm sure if it's full of passengers or cargo it would be very difficult and dangerous, but is it possible with an ...
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What sort of debris has been found in 737 Max fuel tanks?

There have been numerous reports of Boeing finding "foreign object debris" in the fuel tanks of its 737 Max airliners. It's not clear what this debris is. It could range from a couple of missing ...
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What are the CONT and FLT modes of the 737 start switches?

I pilot the PMDG 737 in my simulator and I know that before takeoff and before landing, the start switches must be set to CONT mode and at high altitudes in FLT mode. But what exactly are CONT and FLT ...
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Why does the KC-46 use two sensors for MCAS when the 737 Max doesn’t?

this article states The KC-46 has a two-sensor MCAS system, which “compares the two readings,” the Air Force said. I’m aware that the 737 uses two sensors and always has, but the computer reads ...
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Is the 737NG hydraulically controlled or electronically controlled?

I know that the 737NG is not fly-by-wire, but are the control surfaces controlled with hydraulic systems that transfer the input from the pilot to the control surfaces via fluid (hydraulics), or is ...
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Best Practices when removing/inspecting/mounting control surfaces?

I am looking for a better way to essentially "mount" the control surfaces from a Boeing 737-747-777-787 and MD-11's. The current process is to just remove them and strap to a table. The issues with ...
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How does MCAS communicate with other systems to know if the flaps are retracted or not?

How exactly does MCAS communicate with the flaps setting to know if the flaps have been retracted? I just noticed on the preliminary report for ET302, the flaps were set at 5 degrees. It doesn’t say ...
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What does VIB stand for in EICAS?

From what I know it’s measuring engine vibrations? What do the numbers actually mean? For example, 1.9 VIB:
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Were airworthiness certificates revoked for B737 Max?

Following up from this question - or more specifically Brian Drummond's comment on the accepted answer: Or even revoked without modification, if something new is discovered about the existing ...
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Why didn’t Boeing ramp 737NG production back up in response to the 737 MAX groundings?

The predecessor of the currently-grounded 737 MAX is the 737 Next Generation (737NG), produced from 1997 through 2019. The NG family (comprising the 737-600, -700, -800, and -900) is extremely ...
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Did the First Officer of Ethiopian Flight 302 trim in the wrong direction? [closed]

Looking at the accident report of Ethiopian Airlines Flight 302, it says the cut out switches were used. But the manual trim moved from 2.3-2.1? My reasoning for asking this is because the timeframe ...
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Does the Boeing 737 NG have “5” radar altitude callout?

So, I was watching a video of a Boeing 737 NG land, and heard the "5" callout. Is that an airline option or something? EDIT : link to video
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Is B 737 Max able to comply with certification if MCAS is off or removed? [duplicate]

Boeing 737 Max updated MCAS will probably be cutted off in case of AoA disagree. Without MCAS, the plane is no longer similar to 737 NG (stick force per g requirement). Does that mean a new ...

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