Search found 301 matches

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by Flow2706
Mon Jun 14, 2021 4:43 pm
Forum: Civil Aviation
Topic: Off duty DL F/A causes dvx to OKC on LAX-ATL flight
Replies: 39
Views: 11814

Re: Off duty DL F/A causes dvx to OKC on LAX-ATL flight

The FAA needs to act on mental health screening. Drug test are given randomly and due to reasonable suspicion, but the mental health examination is the elephant in the room. A mental health fitness screening should be a mandatory requirement in the transportation industry on an annual basis. Like t...

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by Flow2706
Wed Jun 02, 2021 8:00 pm
Forum: Technical/Operations
Topic: Retro-jet maintenance
Replies: 8
Views: 1878

Re: Retro-jet maintenance

Not sure about the American Airlines retro liveries, but when I was working for Aer Lingus a couple of years ago we also had quite a few special liveries, one of them a retro livery (EI-DVM). I don't think maintenance needed to apply special procedures/considerations due to the livery. From the pilo...

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by Flow2706
Fri May 21, 2021 7:41 pm
Forum: Technical/Operations
Topic: EU / UN "government fleets" ?
Replies: 7
Views: 1596

Re: EU / UN "government fleets" ?

Many states have transport category aircraft for their government officials. The German "Flugbereitschaft" has some A340 that are being replaced by A350s. Other states have similar arrangements. Regarding the UN, the tend to lease the aircraft they need from different airlines. The UNHAS (...

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by Flow2706
Fri May 21, 2021 11:19 am
Forum: Technical/Operations
Topic: Inflight Oscillation at Cruise
Replies: 15
Views: 2698

Re: Inflight Oscillation at Cruise

These oscillations can be caused by mountain wave activity. As mentioned by VMCA787 the ALT CRZ mode on the A320 allows small altitude variations to increase passenger comfort, therefore the reaction to slight altitude change due to mountain wave activity can be slightly delayed.

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by Flow2706
Fri May 21, 2021 11:15 am
Forum: Technical/Operations
Topic: (Warning) Question about disturbing or morbid topic
Replies: 7
Views: 2920

Re: (Warning) Question about disturbing or morbid topic

It's strange if the victims of the IB610 accident were indeed found naked, as this accident happened during the approach phase. Finding the victims naked usually means that there was an explosive depressurization or that the victims were ejected from the aircraft while it was still in flight (f.e. s...

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by Flow2706
Wed Apr 14, 2021 10:38 am
Forum: Technical/Operations
Topic: YouTube Video - Late Throttle Override. Any further information?
Replies: 26
Views: 3608

Re: YouTube Video - Late Throttle Override. Any further information?

My question is why aren't they using simulators in Europe? The fidelity of modern full motion sims is so good that the lag is imperceptible. They work extraordinarily well for pilot training. Twice I've been on flights where it was the FO's first time actually flying the plane. Smooth as silk. The ...

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by Flow2706
Wed Apr 14, 2021 9:36 am
Forum: Technical/Operations
Topic: YouTube Video - Late Throttle Override. Any further information?
Replies: 26
Views: 3608

Re: YouTube Video - Late Throttle Override. Any further information?

My question is why aren't they using simulators in Europe? The fidelity of modern full motion sims is so good that the lag is imperceptible. They work extraordinarily well for pilot training. Twice I've been on flights where it was the FO's first time actually flying the plane. Smooth as silk. The ...

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by Flow2706
Fri Apr 09, 2021 10:13 am
Forum: Technical/Operations
Topic: Extension of flaps and landing gear during turns on large aircraft
Replies: 18
Views: 3178

Re: Extension of flaps and landing gear during turns on large aircraft

Regardless, I'd get a thrashing if I asked for flaps three as the gear was still moving. Convention is a powerful thing. :D In my previous company flaps 3 with gear still in transit apparently resulted in an FDM event. I was quite surprised when the safety department asked me to submit a report reg...

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by Flow2706
Wed Apr 07, 2021 9:39 pm
Forum: Technical/Operations
Topic: Extension of flaps and landing gear during turns on large aircraft
Replies: 18
Views: 3178

Re: Extension of flaps and landing gear during turns on large aircraft

There is no limitation regarding extending flaps during turns. The load on the flap mechanism is not increased due to the turn, there is no safety risk involved. The speed at flap extension is more critical though. On my type (A320) many pilots try to avoid flap extension close to the limit speed (u...

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by Flow2706
Tue Mar 30, 2021 9:48 pm
Forum: Technical/Operations
Topic: Crosswind Landing Question
Replies: 4
Views: 1408

Re: Crosswind Landing Question

Which is easier to control during a good stiff crosswind situation, an A380 or a CRJ? I'm sure this has been discussed before but does aircraft size affect drift? Is an A380 due to its massive fuselage and tail vertical size subject to more drift as it may act more like a huge sail or is not suscep...

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by Flow2706
Tue Mar 30, 2021 2:39 pm
Forum: Technical/Operations
Topic: A/C type behaviour in turbulence
Replies: 26
Views: 4112

Re: A/C type behaviour in turbulence

Regarding the A320 family, the A320 flies better in turbulence compared to the A319 and A321. The A319 is very light and therefore very sensitive. The A321 tends to yaw a lot in moderate turbulence as the fuselage is quite long compared to the A320. Also the cockpit and aft cabin is further from the...

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by Flow2706
Mon Mar 29, 2021 6:01 pm
Forum: Technical/Operations
Topic: Airlines that don't require their crews to overnight
Replies: 21
Views: 2746

Re: Airlines that don't require their crews to overnight

As far as I know Ryanair and EasyJet don’t have scheduled overnights. Unfortunately, overnights have become relatively uncommon for short/medium haul flights with many airlines.

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by Flow2706
Mon Mar 29, 2021 9:16 am
Forum: Civil Aviation
Topic: SAA flight had an "extaordinarily dangerous" takeoff
Replies: 24
Views: 9837

Re: SAA flight had an "extaordinarily dangerous" takeoff

A possible invalid activation of envelope protections intrigues me. Does anyone know how often this might occur? I don't think I've ever heard of an instance before. There was an OEB about the incorrect activation of the AOA protection. The reason for the publication of this OEB were two events of ...

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by Flow2706
Wed Mar 24, 2021 3:26 pm
Forum: Technical/Operations
Topic: Different manufacturers for jet engines #1 vs. #2
Replies: 25
Views: 4610

Re: Different manufacturers for jet engines #1 vs. #2

For the A320 CEO there is a thing called "engine intermix". However this does not refer to different engine types, but to different versions of the same (CFM56-5) engine. This intermix is usually not really not noticeable to the pilots, except that the EGT/N1 might be a bit different betwe...

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by Flow2706
Mon Mar 22, 2021 2:27 pm
Forum: Technical/Operations
Topic: Grass landing strips
Replies: 21
Views: 2558

Re: Grass landing strips

I have flown gliders for many years, mostly from Grass runways (they are still very common for gliders nowadays). Grass Runways are actually more "forgiving" than hard surface (for firm/hard landings). If the grass is mowed regularly it poses not particular challenges. Long grass can be cr...

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by Flow2706
Sun Mar 21, 2021 3:25 pm
Forum: Technical/Operations
Topic: Why not wider runways?
Replies: 31
Views: 5068

Re: Why not wider runways?

What runway width would you consider sufficient? 60m? 90m? 120m? Everything in life is a compromise. It is clear that every increase in runway width increases costs. The safety benefit is rather negligible. You could probably argue the same thing about roads. The most critical thing about narrow run...

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by Flow2706
Thu Mar 18, 2021 11:52 pm
Forum: Civil Aviation
Topic: Viva Aerobus A320 nose gear collapse at PVR
Replies: 46
Views: 8102

Re: Viva Aerobus A320 nose gear collapse at PVR

If you turn the tiller too far, it will unscrew right off the strut. It's not possible to "unscrew" the nose wheel by tiller movement. There is a mechanical stop on the tiller, the nose wheel movement is limited. No authority would certify an aircraft that could suffer a nose gear collaps...

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by Flow2706
Tue Mar 16, 2021 2:33 pm
Forum: Technical/Operations
Topic: Why are engines on planes changed so often?
Replies: 18
Views: 3701

Re: Why are engines on planes changed so often?

Some airlines also choose to „de-pair“ engines on new aircraft (i.e. swap on of the engines on a new aircraft with the engine of an older aircraft) if there is a reliability issue. This was mandated by the authorities on the 787s when it had so many engines issues. SQ also did it on A330s after they...

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by Flow2706
Thu Mar 11, 2021 12:12 pm
Forum: Technical/Operations
Topic: 737-800 landing with flaps 15
Replies: 3
Views: 1691

Re: 737-800 landing with flaps 15

Landings with a similar "halfway-down" flap selection seem to be a relatively common occurrence on A320 series aircraft (see here: https://www.youtube.com/watch?v=W2Zr_cLlLqk&t=4079s&ab_channel=SkyliteProductions around 1:07). Just to chime in on that, A320s are certified to land ...

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by Flow2706
Thu Mar 11, 2021 12:05 pm
Forum: Technical/Operations
Topic: Door Latch Question
Replies: 18
Views: 2334

Re: Door Latch Question

When I was a ramp agent (before my first pilot job) we were dispatching 737s as well. It was a very common occurrence and was usually spotted by the ramp agent during his walk around before push back. I don't think there is an indication in the cockpit, so most of the time we would just inform the c...

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by Flow2706
Thu Mar 11, 2021 12:17 am
Forum: Technical/Operations
Topic: Taxi and Delay Times
Replies: 31
Views: 2633

Re: Taxi and Delay Times

Low hanging fruit, maybe. It is better to wait on the ground than in the air over the destination. Eurocontrol does a pretty good job at slotting aircraft so the wait is at the runway and not in a holding pattern at the destination. If there is a slot the aircraft usually won't get a pushback clear...

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by Flow2706
Mon Mar 08, 2021 3:43 pm
Forum: Technical/Operations
Topic: Overloading Airliners - easily possible?
Replies: 13
Views: 2476

Re: Overloading Airliners - easily possible?

The calculations are done using standard weights for passengers, which can vary between legislation and type of flight. Many modern transport category aircraft can actually measure their own weight once in flight. This is usually done by a computer based on aerodynamic data (Angle of Attack). On the...

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by Flow2706
Tue Mar 02, 2021 11:10 am
Forum: Technical/Operations
Topic: Airbus planes seeming to switch off engines on hold pattern
Replies: 16
Views: 4113

Re: Airbus planes seeming to switch off engines on hold pattern

To add to above explanations, an A330/350 pilot, or any other airline pilot for that matter, would never switch off a normally operating engine in flight other than in an emergency. It would be considered a massive breach of procedure and a safety event. This is especially true in a two engine airc...

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by Flow2706
Fri Feb 26, 2021 11:37 am
Forum: Technical/Operations
Topic: Fuel flow: Same N1/EPR at different altitudes?
Replies: 9
Views: 1302

Re: Fuel flow: Same N1/EPR at different altitudes?

Fuel flow at higher altitudes is significantly lower than at lower altitudes due to density and other factors. Don't know the values for the 350 but on an A320 the fuel flow will be around 4000kg/h per engine during takeoff, during cruise it is around 1000-1200kg/h per engine.

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by Flow2706
Fri Feb 26, 2021 10:33 am
Forum: Civil Aviation
Topic: Another B777 engine trouble
Replies: 15
Views: 4217

Re: Another B777 engine trouble

More than likely an absolute non-Event. The report mentioned a failure of a FADEC Channel. Not familiar with the 777 systems, but if one channel fails in a dual channel system usually the other channel will take over some or in some cases even all functions of the failed system. That’s the concept o...

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by Flow2706
Thu Feb 25, 2021 12:57 pm
Forum: Technical/Operations
Topic: Shortest runway airports with regular A380 service
Replies: 27
Views: 5833

Re: Shortest runway airports with regular A380 service

I believe DUB's longest runway is only 9,000 ft and routinely has a DUB-LAX flight, albeit with an A330-200. A 10,000 ft runway at sea level is quote long. For values of long. We always seem to have to use Flaps 3 on that one. :) I edited my post to be as precise as possible. The DUB runway per wik...

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by Flow2706
Mon Feb 22, 2021 5:44 pm
Forum: Civil Aviation
Topic: EU Preparing Airline Eco-Label system
Replies: 58
Views: 3883

Re: EU Preparing Airline Eco-Label system

To be honest I don't think that there are significant differences in emissions between the European airlines. Nowadays most European airlines are operating modern types (mostly A320CEO/NEO and 737NG/MAX for medium haul flights and modern wide bodies on long haul flights, A330/787/350) with a high de...

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by Flow2706
Wed Feb 17, 2021 12:30 am
Forum: Technical/Operations
Topic: Is it true that when flying air pressure won't allow the cabin door to open?
Replies: 22
Views: 3157

Re: Is it true that when flying air pressure won't allow the cabin door to open?

Doors on pressurized airplanes can't be opened in flight due to the differential pressure. During cruise flight the differential pressure between the cabin and the atmosphere is around 8-9PSI (depending on the aircraft type and altitude). The doors move slightly inwards before opening outwards so yo...

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by Flow2706
Fri Feb 12, 2021 10:31 pm
Forum: Technical/Operations
Topic: Who flies aircraft to storage areas?
Replies: 11
Views: 2998

Re: Who flies aircraft to storage areas?

As mentioned above usually it is the airline. When one of my former employers went bankrupt it was a controlled process so the operations were closed down in an "orderly" fashion. I was selected to bring one aircraft to the storage in Lourdes. I still remember the mechanic signing off the ...

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by Flow2706
Thu Feb 11, 2021 8:23 am
Forum: Technical/Operations
Topic: The Magic of "CAT IIIB"
Replies: 281
Views: 16876

Re: The Magic of "CAT IIIB"

BTW I have read a few comments on social media of people claiming LHR and JFK being the only CAT IIIC enabled airports in the world,however,as per my own research I have found that currently No Airport in the world is CAT IIIC equipped,So would I be right in claiming CAT IIIB as the presently used ...

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by Flow2706
Thu Feb 11, 2021 12:14 am
Forum: Technical/Operations
Topic: The Magic of "CAT IIIB"
Replies: 281
Views: 16876

Re: The Magic of "CAT IIIB"

The significance of the alert height is that below that height an approach could be continued even if failures occur. For the A320 family the AH is 100ft and as far as I know it is 200ft for the other Airbus aircraft. The official EASA definition (from CS-AWO) is as follows: "The alert height i...

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by Flow2706
Tue Feb 02, 2021 12:45 am
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4758

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 Flow2706
Mon Feb 01, 2021 8:42 pm
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4758

Re: Calling out 80 knots

... it is also an incapacitation check. If the callout is missing the PF will usually make the callout himself to see if the PM is just not paying attention or if he is either incapacitated or his airspeed indication is different. If there is no response to the second challenge, the takeoff would b...

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by Flow2706
Mon Feb 01, 2021 8:14 pm
Forum: Technical/Operations
Topic: Calling out 80 knots
Replies: 39
Views: 4758

Re: Calling out 80 knots

In addition to the speed indicator cross check and the reminder that the aircraft is in the high speed regime of the takeoff roll it is also an incapacitation check. If the callout is missing the PF will usually make the callout himself to see if the PM is just not paying attention or if he is eithe...

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by Flow2706
Wed Jan 27, 2021 10:50 am
Forum: Civil Aviation
Topic: Pegasus A320NEO landing with nosegear at 90 degrees at BSL
Replies: 28
Views: 5417

Re: Pegasus A320NEO landing with nosegear at 90 degrees at BSL

False, as is clearly indicated by these incidents, for a start. As well, and as previously mentioned, the BSCU does turn the NLG upon extension to ensure operability. This turn is initiated by pressurizing Hyd Pwr and unlocking a cam. This is needed to pressurize, but primarily only to turn it back...

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by Flow2706
Tue Jan 26, 2021 10:50 pm
Forum: Civil Aviation
Topic: Pegasus A320NEO landing with nosegear at 90 degrees at BSL
Replies: 28
Views: 5417

Re: Pegasus A320NEO landing with nosegear at 90 degrees at BSL

I assume the pilots knew beforehand? Is there an indicator? There is not direct indication of this failure mode. However this failure will trigger both the WHEEL NW STRG FAULT and the L/G SHOCK ABSORBER FAULT, so the combination of these two failures might indicate this fault. The A320 FCOM has the...

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by Flow2706
Mon Jan 25, 2021 10:10 am
Forum: Technical/Operations
Topic: A320 battery switches
Replies: 15
Views: 2394

Re: A320 overhead panel

The APU can’t be started unless the batteries are on and also it will auto shutdown if the batteries are turned off. The reason for this is indeed the fire protection, which is not available with the batteries off. It’s quite common however to have the aircraft parked at the gate with batteries off ...

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by Flow2706
Sat Jan 23, 2021 3:23 pm
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 863
Views: 252593

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

Even if this accident was indeed related to the autothrottle system, it is most likely not comparable to the Asiana accident. The Asiana accident was mostly the result of poor system knowledge resulting in mode confusion and finally lack of monitoring (probably due to complacency). Even if the desig...

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by Flow2706
Wed Jan 13, 2021 10:56 pm
Forum: Aviation Hobby
Topic: A319/A320 Ops from an 1803m Runway?
Replies: 17
Views: 6708

Re: A319/A320 Ops from an 1803m Runway?

I have flown an A320 from an 1830m Runway. 2400km or so would be tight, but may be feasible with a reduced payload. It’s would probably be a flap 3 takeoff. Landing on these short runways can be challenging as well, but it’s doable if you don’t float. A ‘trick’ that is sometimes used if the perform...

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by Flow2706
Wed Jan 13, 2021 7:56 pm
Forum: Aviation Hobby
Topic: A319/A320 Ops from an 1803m Runway?
Replies: 17
Views: 6708

Re: A319/A320 Ops from an 1803m Runway?

I have flown an A320 from an 1830m Runway. 2400km or so would be tight, but may be feasible with a reduced payload. It’s would probably be a flap 3 takeoff. Landing on these short runways can be challenging as well, but it’s doable if you don’t float. A ‘trick’ that is sometimes used if the performa...

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by Flow2706
Tue Jan 12, 2021 7:04 pm
Forum: Civil Aviation
Topic: Video of Long Island Crash
Replies: 13
Views: 3740

Re: Video of Long Island Crash

I think that the pilots life was saved by the fact that the left wing hit the ground first. It probably took a good percentage of the impact energy, thereby reducing the energy that had to be absorbed by the fuselage (and the pilots spine). I doubt that that accident would have been survivable if th...

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by Flow2706
Tue Jan 12, 2021 6:29 pm
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 863
Views: 252593

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

Picking up on an earlier post I made. I deferred, perhaps wrongly, from the ground track of the flight after takeoff and throughout the climb, that the aircraft was being flown manually, and that the autopilot did not appear to have been engaged. I was not available to continue conversation where p...

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by Flow2706
Mon Jan 11, 2021 9:45 pm
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 863
Views: 252593

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

Once FDR and CVR are studied, I feel the cause may be largely a repeat of other similar crashes. From ground track, the climb out from take off to end of recording appears to be flown manually with no autopilot engaged, one can speculate as to why the crew may have chosen to do that in IMC conditio...

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by Flow2706
Mon Jan 11, 2021 2:38 pm
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 863
Views: 252593

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

Absolutely 100-percent true. I agree completely. I think of "crew" as generally-encompassing everyone who actually is working, and maybe, maybe, people from that airline on the way to work for it. We are of like mind, because I actually thought "Would they have a ride-along mech on a...

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by Flow2706
Sun Jan 10, 2021 12:06 pm
Forum: Civil Aviation
Topic: When UPS Flew Passengers
Replies: 21
Views: 6564

Re: When UPS Flew Passengers

The planes were so old that they were beaten out of shape by many landings etc, so the interiors weren’t really interchangeable, and they initially suffered delays and cancellations because the QC interior waiting at a station on a Friday afternoon wouldn’t fit. They figured out pretty quickly that...

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by Flow2706
Sun Jan 10, 2021 1:39 am
Forum: Civil Aviation
Topic: Sriwijaya Air 737-500 (SJ182 CGK-PNK) crashes shortly after takeoff
Replies: 863
Views: 252593

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

That seems like an odd number of "crew" for a 737-500, where it would be 4 or 5 typically. Doesn't mean they aren't airline employees deadheading somewhere, but to call them "crew" seems strange. (Some sloppy media did this when talking about the Atlas 767-300 crash as having &q...

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by Flow2706
Sat Jan 02, 2021 2:09 pm
Forum: Technical/Operations
Topic: Supersonic airflow above wing
Replies: 8
Views: 1737

Re: Supersonic airflow above wing

The exact speed (which is actually a Mach number, called critical Mach number, Mcrit) to avoid supersonic flow on the top surface of the wing is depending on the design of the wing, so it's quite variable. Anyhow, modern jet transport aircraft are using supercritical profiles on the wings. These are...

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by Flow2706
Mon Dec 14, 2020 3:50 pm
Forum: Civil Aviation
Topic: Trainer Aircraft in the 21st Century
Replies: 16
Views: 1816

Re: Trainer Aircraft in the 21st Century

I did my whole training (2008-2010) on Piper aircraft. Initially on Pa38, then Pa28 Archer/Warrior, IR was done on Pa28 Arrows und MEP on Seminoles. My flight school was starting to replace the Seminoles by Tecnam P2006 when I had finished my training. In Europe many clubs use Katanas and to a lesse...

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by Flow2706
Thu Dec 03, 2020 5:21 pm
Forum: Technical/Operations
Topic: When do the flight crew board an aircraft before a flight?
Replies: 28
Views: 4011

Re: When do the flight crew board an aircraft before a flight?

In most companies I worked for cockpit and cabin crew boarded at the same time. However in one airline (European A320 operator) cabin crew and pilots only met each other in the aircraft. The SCC was trained and allowed to call for a rapid disembarkation, if the flight crew was not on board yet. Howe...

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by Flow2706
Mon Nov 30, 2020 2:20 pm
Forum: Technical/Operations
Topic: Those who fly airplanes with FBW flight envelope protections
Replies: 32
Views: 41424

Re: Those who fly airplanes with FBW flight envelope protections

But, but, but.... there's a well-known poster on this site who has been assuring us for two years now, that a certain aircraft (no, I absolutely refuse to mention it's name :duck: ) has perfectly benign stall characteristics, just like the Cessna 172 he has flown for most of his 120 hrs. There is e...

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