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by Starlionblue
Wed Feb 03, 2021 8:46 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4591

Re: Calling out 80 knots

I believe 80kts is when Airbus transitions from flight phase 2 to flight phase 3. Not phase 1 to phase 2. It's the transition from phase 3 to phase 4. Phase 3 starts with "ENGINE TO PWR" and ends at 80kn. Phase 4 starts at 80kn and ends at liftoff. Thus, take-off inhibits starts at 80kn. ...

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by Starlionblue
Wed Feb 03, 2021 5:38 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4591

Re: Calling out 80 knots

Also, check airspeed indicators are agreeing, that many EICAS messages are suppressed until 400’ AFE. Advisory messages are inhibited from 80 knots to 400 feet (or 800 feet on some models). It’s AGL not AFE - uses Radio Altitude. The Caution Aural and Master Caution Light are inhibited from 80 knot...

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by Starlionblue
Wed Feb 03, 2021 2:02 am
Forum: Technical/Operations
Topic: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!
Replies: 26
Views: 4026

Re: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!

GalaxyFlyer wrote:
Magically, LH2 just enters the propulsion system. How?


With a yellow arrow, that's how!

8-)

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by Starlionblue
Tue Feb 02, 2021 9:08 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4591

Re: Calling out 80 knots

That was literally the scenario in one of our recurrent training sims. And yes, you would reject. Because when I didn't hear the "one hundred knots" call, I glanced to my left and the guy was simulating having fainted. ;) Why would you risk flying with a possibly incapacitated guy in the ...

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by Starlionblue
Tue Feb 02, 2021 3:26 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4591

Re: Calling out 80 knots

Ok, I'll own that perhaps in some circles the 80 knot call is now technically an incapacitation check, but let's think about this, Flow: what's to stop a pilot with a similar condition as your friend (really sorry to hear about that, btw) from being fully alert at 80 knots to out of it by V1 or rot...

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by Starlionblue
Tue Feb 02, 2021 2:54 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4591

Re: Calling out 80 knots

I forgot the "positive climb" call as PM in a late-night sim once. Just slipped my mind even though I remember distinctly keeping an eye on both altimeter and radio altimeter to ensure we were climbing. I was so surprised when I heard "confirm positive climb?" from the left seat...

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by Starlionblue
Tue Feb 02, 2021 12:17 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4591

Re: Calling out 80 knots

Summarising the above post. - Check airspeed/instruments are working and agreeing. - High speed rejected take-off as opposed to low speed. At high speed only reject for an engine failure/fire or other serious event. At high speed most warnings are inhibited, so basically reject for any warning that ...

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by Starlionblue
Sun Jan 31, 2021 12:28 am
Forum: Technical/Operations
Topic: Saudia Flight 163 HZ-AHK Accident Analysis
Replies: 34
Views: 3435

Re: Saudia Flight 163 HZ-AHK Accident Analysis

If you need to post files you can use DropBox. If you need to post pictures you can use Imgur.

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by Starlionblue
Sat Jan 30, 2021 12:49 am
Forum: Technical/Operations
Topic: Refueling wide bodies
Replies: 31
Views: 4788

Re: Refueling wide bodies

IFlyVeryLittle wrote:
Along the same lines, do airlines strategically shop around for fuel at airports/states/countries with lower prices?


Not only that, they buy large amounts of fuel futures in order to decrease exposure to price fluctuations.

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by Starlionblue
Fri Jan 29, 2021 7:04 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

Experienced something similar a few years back on a KLM 777-300 between DPS - SIN. Flight was full, but the take-off thrust did feel pretty solid & way more than a regular 777 take off roll. Not sure if there were any Runway limitations being enforced that day, but it certainly did feel like he...

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by Starlionblue
Thu Jan 28, 2021 11:17 pm
Forum: Technical/Operations
Topic: Refueling wide bodies
Replies: 31
Views: 4788

Re: Refueling wide bodies

Since some large aircraft can take up to 200 tons of fuel, how is that accomplished? Does a fuel truck(which I assume can't carry more than maybe 30 tons of fuel) make 5-6 visits to the fuel silo(is this the correct term?) and back to the aircraft? Or do they send 6 trucks at once? How long does it...

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by Starlionblue
Thu Jan 28, 2021 12:15 pm
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

I remember being a passenger departing from KATL on a NW 75 back in the day. However they crunched their speeds up front: I was in a state of surprise, and inadvertently blurted "Holy @$#@!" out loud as it seemed that from spool to Vr... felt like mere seconds, jumping off a long, dry run...

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by Starlionblue
Thu Jan 28, 2021 3:16 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

That is true. The A332 flight I described was a 7.5/8hr hop and had a good amount of passengers. I'm not sure how much cargo AA carries on seasonal routes between CLT and Europe, but we were light enough for a FL370 initial cruise (380 on the return). The CRJ flight was nearly full on a 1hr20min tr...

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by Starlionblue
Thu Jan 28, 2021 1:14 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

IIRC the CRJ-700's T/W is up there near, if not slightly higher than the 752. I had the opportunity to fly on a CRJ7 and connect to an A332, so I got to compare both on the same day. The -700, especially from a 6500-foot runway was a little rocket and had me pushed into the seat. While the A332 is ...

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by Starlionblue
Thu Jan 28, 2021 12:18 am
Forum: Technical/Operations
Topic: Refueling wide bodies
Replies: 31
Views: 4788

Re: Refueling wide bodies

Since some large aircraft can take up to 200 tons of fuel, how is that accomplished? Does a fuel truck(which I assume can't carry more than maybe 30 tons of fuel) make 5-6 visits to the fuel silo(is this the correct term?) and back to the aircraft? Or do they send 6 trucks at once? How long does it...

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by Starlionblue
Wed Jan 27, 2021 9:22 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

still do not understand how change Vmin-control can change V1, which in any case controllable. Because the lowest V1 must be greater or equal that Vmc. So suppose you are able to get a lower V1, you still have to make it artificially higher to satisfy Vmca requirements. If you can bring down Vcma b...

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by Starlionblue
Wed Jan 27, 2021 2:29 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

On a contaminated runway, it could well have been a fixed derate. Dear Starlionblue, Oh, ok - I thought that contaminated runways (e.g. snow) would often mandate a full power takeoff as per SOP, because the start-stop distance is longer. I stand corrected then. Best regards, Hendric As GalaxyFlyer ...

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by Starlionblue
Tue Jan 26, 2021 7:22 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

hitower3 wrote:
Dear Swiss03,

Question : was your takeoff performed on a contaminated runway? Was this a short flight, e.g. Zurich-Geneva? Was the cabin rather empty?

If yes, you were lucky to experience a full power takeoff in a light plane.


On a contaminated runway, it could well have been a fixed derate.

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by Starlionblue
Tue Jan 26, 2021 3:16 am
Forum: Technical/Operations
Topic: PHL runway 8
Replies: 25
Views: 3274

Re: PHL runway 8

Why CPT only? What could a CPT do a FO couldn’t despite lifting it off at Vr or stopping with calculated balanced field prior V1? I get the CPT only for landings, but take offs? It may have to do with transfer of controls on a rejected takeoff. You’re taking one more step out if performance is crit...

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by Starlionblue
Tue Jan 26, 2021 3:12 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5040

Re: A220-100 is the new 757-200

I always assumed the noticeable take-off push in the 757 was as it had a good power to weight ratio, but was probably old enough not to have an electronic launch control which reduced thrust unless at MTOW. A newer plane might have a similar or even higher power to weight ratio, but would never use...

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by Starlionblue
Tue Jan 26, 2021 3:05 am
Forum: Technical/Operations
Topic: Why was N106US the a320 involved in the hudson river ditching never repaired?
Replies: 30
Views: 4862

Re: Why was N106US the a320 involved in the hudson river ditching never repaired?

Qantas repaired the 747 which overran BKK at its own expense, insurers wanted to write off, Qantas wanted to preserve its "never had a jet hull loss" record. Indeed they did. As you say though, it was very much an image-driven repair. It was not a good economic decision. Well, it may have...

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by Starlionblue
Mon Jan 25, 2021 7:58 am
Forum: Technical/Operations
Topic: A320 battery switches
Replies: 15
Views: 2338

Re: A320 overhead panel

One quirk of turning on the batteries in a dark cockpit is that when you press the BAT 1 pushbutton, the BAT 2 pushbutton will go from dark to showing "OFF". The battery was actually off before, but there was no power for the pushbutton light.

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by Starlionblue
Sun Jan 24, 2021 11:04 pm
Forum: Technical/Operations
Topic: Why was N106US the a320 involved in the hudson river ditching never repaired?
Replies: 30
Views: 4862

Re: Why was N106US the a320 involved in the hudson river ditching never repaired?

AFAIK a damaged aircraft (temporarily) belongs to the insurance. Then the insurance decides whether it's worth to repair the aircraft, or not. Qantas repaired the 747 which overran BKK at its own expense, insurers wanted to write off, Qantas wanted to preserve its "never had a jet hull loss&qu...

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by Starlionblue
Sun Jan 24, 2021 10:53 am
Forum: Technical/Operations
Topic: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!
Replies: 26
Views: 4026

Re: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!

Undermount is only partly driven my maintenance. Maintenance is far from the main major consideration. Mounting the engine below and in front of the wing keeps it in clean airflow, counteracts wing twisting moment and counteracts wing bending moment. This translates to massive weight reduction comp...

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by Starlionblue
Sun Jan 24, 2021 9:26 am
Forum: Technical/Operations
Topic: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!
Replies: 26
Views: 4026

Re: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!

With every additional motor/fan, you're adding complexity and losing efficiency. With current jet engine reliability, a pilot is unlikely to see an engine failure in his entire career. agreed and understood - but at least my speculations are specifically not about current jet/turbine engines. So th...

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by Starlionblue
Sun Jan 24, 2021 7:11 am
Forum: Technical/Operations
Topic: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!
Replies: 26
Views: 4026

Re: Quad and Tri Jets will come back in the skies "What is old is new again" Alternative fuels and good news!

With every additional motor/fan, you're adding complexity and losing efficiency. With current jet engine reliability, a pilot is unlikely to see an engine failure in his entire career. So the best combo currently is two engines. Systems aren't really impacted. You can manage sufficient redundancy wi...

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by Starlionblue
Sat Jan 23, 2021 9:39 am
Forum: Technical/Operations
Topic: Why do some airliners seemingly have two sets of EFBs?
Replies: 25
Views: 3110

Re: Why do some airliners seemingly have two sets of EFBs?

Delta tried the Surface tablets, hated them, terrible service, went to Apple Delta and Skywest, both had them. So glad they dumped them. What was wrong with the Surface with these airlines? Overall iPads are a lot cheaper for the airline and lots of pilots want to have it. So its a winner for the b...

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by Starlionblue
Sat Jan 23, 2021 9:39 am
Forum: Technical/Operations
Topic: Hypothetical: Engine failure on trijet retirement ferry flight
Replies: 15
Views: 2681

Re: Hypothetical: Engine failure on trijet retirement ferry flight

T54A wrote:
Didn’t BA lose a donkey after take off out of the US on a B744, and continue to the UK on three? This was a normal pax flight I believe.


Yep. They then used a bit more fuel than calculated and had to divert to Manchester I think.

The FAA went bonkers, even though no regulations were violated.

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by Starlionblue
Sat Jan 23, 2021 3:16 am
Forum: Technical/Operations
Topic: QF Project Sunrise A35K performance
Replies: 17
Views: 3023

Re: QF Project Sunrise A35K performance

Both wing and centre tanks on the A350 are pretty close to the CoG. I doubt more fuel will make a big difference.

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by Starlionblue
Fri Jan 22, 2021 5:29 am
Forum: Technical/Operations
Topic: How long does it take a 777 to dump fuel to reach maximum landing weight?
Replies: 11
Views: 2303

Re: How long does it take a 777 to dump fuel to reach maximum landing weight?

While certainly you want that medical emergency on the ground ASAP, this should be weighed against the additional threats of an overweight landing. Normally there isn't any damage but it isn't really about the risk of damaging the aircraft. Threats would be high brake temperatures, which can lead t...

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by Starlionblue
Thu Jan 21, 2021 11:57 pm
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 836
Views: 241703

Re: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff

Regarding AA587, to this day the final findings still boggles my mind. I mean if that's what the FDR shows it's what it shows, but I just cant imagine a professional pilot doing what that pilot did as far as the rudder goes. I'd imagine most pilots would really just sit there and monitor the situat...

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by Starlionblue
Thu Jan 21, 2021 11:45 pm
Forum: Technical/Operations
Topic: How long does it take a 777 to dump fuel to reach maximum landing weight?
Replies: 11
Views: 2303

Re: How long does it take a 777 to dump fuel to reach maximum landing weight?

Example for the 777-200LR: MTOW: 347,500 kg MLW: 223,168 kg -> Maximum amount Fuel to dump: 124,332 kg Maximum jettison rate with both nozzle valves open and all jettison pumps operating: 2,449 kg/min Jettison rate with only one nozzle valve open and only wing tank jettison pumps operating: 1,224 k...

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by Starlionblue
Thu Jan 21, 2021 12:58 am
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 836
Views: 241703

Re: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff

Any airliner rudder is strong enough to rip the tail off if mishandled... Rudders are certified for one full deflection, and back. Swinging the rudder back and forth repeatedly like the FO on AA587 did is a no-no. My recollection is that there actually were dropped jaws all over the aviation indust...

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by Starlionblue
Thu Jan 21, 2021 12:34 am
Forum: Technical/Operations
Topic: How long does it take a 777 to dump fuel to reach maximum landing weight?
Replies: 11
Views: 2303

Re: How long does it take a 777 to dump fuel to reach maximum landing weight?

While certainly you want that medical emergency on the ground ASAP, this should be weighed against the additional threats of an overweight landing. Normally there isn't any damage but it isn't really about the risk of damaging the aircraft. Threats would be high brake temperatures, which can lead to...

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by Starlionblue
Wed Jan 20, 2021 11:21 am
Forum: Technical/Operations
Topic: Why do some airliners seemingly have two sets of EFBs?
Replies: 25
Views: 3110

Re: Why do some airliners seemingly have two sets of EFBs?

We have the same deal on the A350. Integrated EFB on the outer display units, and iPad EFB mounted in the window. The iPads are with us all the time, so we can read the documentation before sign-on, use them at dispatch, etc. They also have necessary company apps that are not on the integrated EFB, ...

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by Starlionblue
Wed Jan 20, 2021 10:33 am
Forum: Technical/Operations
Topic: Why was N106US the a320 involved in the hudson river ditching never repaired?
Replies: 30
Views: 4862

Re: Why was N106US the a320 involved in the hudson river ditching never repaired?

Japan Airlines 2 was a very gentle impact. N106US was very much not.

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by Starlionblue
Wed Jan 20, 2021 6:12 am
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 836
Views: 241703

Re: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff

This accident seems to have alot in common with the 2001 crash of AA587 that happened on climbout from JFK. The PCU/rudder hard-over issue has been fixed for decades. Is the rudder on the 737 large enough cause the separation or significant damage to the vertical stabilizer if given inappropriate p...

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by Starlionblue
Wed Jan 20, 2021 4:05 am
Forum: Technical/Operations
Topic: 787 Engine Start & Spoilers
Replies: 6
Views: 1991

Re: 787 Engine Start & Spoilers

It biases the spoilers up during engine start and taxi to prevent scraping of the ends of the spoilers from scraping on the flaps when the flaps are extended. Given the sophistication of this aircraft, wouldn't it make more sense to do that when the flap setting is selected? The chosen sequence acc...

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by Starlionblue
Mon Jan 18, 2021 9:40 am
Forum: Technical/Operations
Topic: How does an Airline determine the number of aircraft needs?
Replies: 3
Views: 1301

Re: How does an Airline determine the number of aircraft needs?

You have not attached an image. ;)

If you only have the image locally, you can upload to an image service like Imgur and link to that.

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by Starlionblue
Mon Jan 18, 2021 3:36 am
Forum: Technical/Operations
Topic: “Line up and wait”
Replies: 38
Views: 3912

Re: “Line up and wait”

I know that there were significant communications changes implemented after the Tenerife disaster, aimed at standardising verbiage. However, I don't know when the phrase "line up and wait" was adopted, but it may well have been after Tenerife. I think the US moved to "line up and wait...

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by Starlionblue
Mon Jan 18, 2021 1:56 am
Forum: Technical/Operations
Topic: “Line up and wait”
Replies: 38
Views: 3912

Re: “Line up and wait”

The reason the phrase was changed was that the previous command "Line Up and Hold" was believed to have been misinterpreted by the KLM 747 flight crew in the worlds worst aircraft accident in Tenerife when the 2 747s collided in the fog. It was believed that the KLM 747 crew while multipl...

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by Starlionblue
Mon Jan 18, 2021 12:55 am
Forum: Technical/Operations
Topic: NavBlue (Airbus) FlySmart 5.0 and iOS 14.3
Replies: 2
Views: 812

Re: NavBlue (Airbus) FlySmart 5.0 and iOS 14.3

Yes.

Disclaimer: I'm not a regulator, manufacturer or AOC holder. :D

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by Starlionblue
Sun Jan 17, 2021 12:10 pm
Forum: Technical/Operations
Topic: Spped drop on climb/cruise
Replies: 3
Views: 1647

Re: Spped drop on climb/cruise

It is very hard to tell anything concrete in airliners from "seat of the pants" sensations. Our senses regularly deceive us. Watch the instruments. Trust the instruments. Know when and how the instruments can be in error if they malfunction. If you lost both engines in the climb, you'd not...

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by Starlionblue
Sun Jan 17, 2021 1:10 am
Forum: Technical/Operations
Topic: “Line up and wait”
Replies: 38
Views: 3912

Re: “Line up and wait”

In the US, you'll get a LUAW once the landing aircraft has crossed the threshold or the point at which you're holding, but not necessarily after it touching down. That’s reasonable, but the FAA procedure of issuing the landing clearance to two planes both on final sounds fishy to me, too, as it doe...

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by Starlionblue
Sun Jan 17, 2021 1:00 am
Forum: Technical/Operations
Topic: Why is the distance between 77W cockpit and the first row seat so long?
Replies: 10
Views: 2296

Re: Why is the distance between 77W cockpit and the first row seat so long?

You can't have any seats in front of the number 1 doors, which means you have to put other stuff there. There are lavatories and a big galley there. And yes, typically a crew rest entrance. However, the crew rest itself is in the crown so doesn't take up a lot of floor space. If you search for seat ...

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by Starlionblue
Sun Jan 17, 2021 12:41 am
Forum: Technical/Operations
Topic: “Line up and wait”
Replies: 38
Views: 3912

Re: “Line up and wait”

Just one example, hard to identify the traffic the tower referring to. Like MaxQ, we’re accustomed to the clearance to enter the runway AFTER the landing traffic touches down. I don’t see where it speeds things up. I see your points, but I've never found it ambiguous which traffic tower is referrin...

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by Starlionblue
Sat Jan 16, 2021 1:26 pm
Forum: Technical/Operations
Topic: “Line up and wait”
Replies: 38
Views: 3912

Re: “Line up and wait”

I’ve noticed that almost invariably planes start their takeoff after ATC says line up and wait but before getting the “cleared for takeoff” message. I would have thought that “line up and wait” meant something stationary. Just curious what I’m missing. If you expect to be cleared in short order, yo...

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by Starlionblue
Fri Jan 15, 2021 11:26 am
Forum: Technical/Operations
Topic: Why are preflight walk-arounds done by pilots and not ground personnel?
Replies: 38
Views: 4632

Re: Why are preflight walk-arounds done by pilots and not ground personnel?

Pilots carry out a walkaround Inspection as part of their Pre & Post Flight checklist. Engineering Personnell carry out a Transit Check Inspection which is a more detailed check. Typically pilots don't do a post-flight walkaround. Though I have gone to look for lightning strike damage out of cu...

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by Starlionblue
Fri Jan 15, 2021 9:51 am
Forum: Technical/Operations
Topic: Flying an unmodified, original 747-100 in 2021
Replies: 26
Views: 8417

Re: Flying an unmodified, original 747-100 in 2021

Yes, i am just making that correction about PWS since the CRJ don’t have have system. Looks like you are correct. I was partially correct. CFR 121.358 requires an airborne windshear warning system on all turbine-powered aircraft, which I interpreted to mean also requires PWS. However, I consulted w...

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