Re: Lafayette, LA: 5 killed in Crash

News report said fog with 0.25sm visibility at the time of the accident. That’s pretty dense soup on take off. Speculation of course but not hard to imagine spatial disorientation immediately after rotation. Agreed it's a possibility. 0853 and 0953 METARs were 0.75 miles visibility in mist/fog with...

Re: AA Strands Dallas Cowboys

Return flight was at 22000. Seems a low cruise altitude.

Also, according to Flightaware, scheduled departure was 855, actual was 1114. So 2 hour 20 min delay to think about their poor play.

Re: The Space Force

TWA772LR wrote:

So is this thread about the Starliner or the Space Force?

Re: How much power is needed for pressurization?

I stand corrected. The turbocompressors were driven by bleed air, then? Honestly, I was surprised by that too. But I guess it makes sense. Not enough spare bleed air to pressurize the cabin, but enough to spin a compressor. Some posts in this old thread: https://www.airliners.net/forum/viewtopic.ph...

Re: How much power is needed for pressurization?

On the 707 they were drive by bleed air. See: https://www.707jet.com/systems/pneumatic-system/ Not bleed air. Separate turbocompressors. See pics in SheikhDjibouti's post. that being said, later versions may have had bleed air, or the CFM re-engines of both DC-8 and 707. It says right in the link I...

Re: How much power is needed for pressurization?

There was also an intermediate era between the pistons and modern bleed systems. Jets like the DC-8 and 707 didn't use engine bleed for pressurisation. They had separate compressors. If you look at the nose of a DC-8, it has two intakes in the chin, and the DC-8 has intakes above the engine intakes...

Re: How much power is needed for pressurization?

How did piston powered aircraft like the DC-7 or L1049 do pressurization?

Re: Chilean Air Force C-130 disappears on its way to Antarctica

Apparently it's been confirmed by the FACh (Chilean Air Force): https://www.theclinic.cl/2019/12/12/fach-confirma-la-existencia-de-un-audio-de-whatsapp-que-podria-revelar-la-causa-del-accidente-del-avion-hercules-c-130/ https://www.soychile.cl/Santiago/Sociedad/2019/12/12/629696/Revelan-que-pasajer...

Re: Chilean Air Force C-130 disappears on its way to Antarctica

According to the latest news, there's a WhatsApp audio message sent from the plane by a soldier to its mother, telling that the plane had experienced some sort of electrical failure. https://tn.com.ar/internacional/un-pasajero-del-avion-que-se-cayo-en-chile-envio-un-dramatico-audio-de-whatsapp-dond...

Re: Americans dating abroad?

johns624 wrote:

seemyseems wrote:

There is a show which might be of interest called 90 Day Fiancé. I caught part of an episode with a woman from GA engaged to a guy in Nigeria. Very interesting

Was he a prince?

Re: Pictures surfacing of 777X Sept Test Failure - they are Bad

The concern is not whether or not it failed within certification tolerances. The concern is that it failed at an unexpected point of failure and in a catastrophic way. You dont know that it is an unexpected point of failure. It is possible that this failure came at the location expected to fail fir...

Re: Pictures surfacing of 777X Sept Test Failure - they are Bad

The concern is not whether or not it failed within certification tolerances. The concern is that it failed at an unexpected point of failure and in a catastrophic way. You dont know that it is an unexpected point of failure. It is possible that this failure came at the location expected to fail fir...

Re: T-38C 2 ship Crash at KEND 21 Nov

GalaxyFlyer wrote:

AirlineCritic wrote:

During training, would the students fly in formation with other planes, including take off/landing in formation?

it’s not possible to fly formation without other planes.

Re: Crash at Stuart Air Show

Saw N10VD at KPVG a few weeks ago. Pilot was really putting on a show. I'd never seen one fly before and was surprised by the performance.

Re: Technology to Dynamically Reconfigure Airplane Classes?

The problem I see with the example you give, is if you remove all the F seats for the return leg, how do you get them back to the orgin for the next leg that requires them. Seems like you would spend a lot of money shipping seat units to and from where they are needed. Or scheduling some round robin...

Re: VH-92 and VH-71 contracting

Lockheed didnt aquire Sikorsky until 2015, six years after the VH-71 program was cancelled

Re: Captain Al Haynes has Flown West (UA232)

I was around 11 when this happened. I remember that a librarian from our city library was a surviving passenger.

RIP. Captain

Re: maintenance mishap causes extensive damage to an Emirates Airbus A380

You say no, but the right combination of actions will do it. Bit more difficult to do on a bus to a boeing but if your in the LGCIUs and performing certain tests there are some very clear warnings suggesting the gear may move and gear pins must be fitted. True. Sorry I jumped the gun. I forget thes...

Re: maintenance mishap causes extensive damage to an Emirates Airbus A380

The forward doors open only when the gear is to move, then they close after the move, be it lowering or raising. The fact that they are open indicates that someone selected gear up without the locking pins in place. The main gear wouldn’t move because of the weight on them; they go sideways so woul...

Re: $1500.00 not enough to switch seats in Y!

It’s a global ranking. Go argue about their Methodist with them (and you can read their methodology) http://www.espn.com/espn/feature/story/_/page/worldfame100/espn-world-fame-100-top-ranking-athletes People need to argue over anything. The fact of the matter is, the post I was responding to asked ...

Re: Is the P-8A Poseidon the only one 737 model with raked wingtips?

Gate size. P-8 wingspan listed as 123' 6", which bumps it up a category. 737NG/Max are 112' 7" / 117' 10" respectively. Limit for Group III / Code C is 118'. See below thread... sort of old but I'd imagine info hasn't changed. https://www.airliners.net/forum/viewtopic.php?t=761459 FAA...

Re: What helicopter is this?

timz wrote:

(Now that I continue thru his pics I see it's a Chinook -- were their cabins wider than V107s?

Re: Have all Navy F18's left Atsugi for Iwakuni by now?

According to CAW-5 webpage all their fixed wing assets have moved to Iwakuni. All that is left at Atsugi is three H-60 squadrons. JSDF has some fixed wing assets there, but nothing using afterburners. Iwakuni should be fairly use to jet noise. Marine Hornet and Harrier squadrons have been based ther...

Re: Updated: Helicopter crashed into building in Manhattan

The NY Times says he lifted off at 1:32PM. The most recent LGA METAR prior to that was this one at 1:15, and he'd probably have had this info when deciding whether to go: SPECI KLGA 101715Z 04012KT 2SM R04/4000VP6000FT -RA BR SCT007 OVC010 17/16 A3005 RMK AO2 P0003 T01720156= To decode that, winds ...

Re: Bleed AIr Off the Low Pressure Compressor?

Smaller jet I worked on powered the packs with LP air supplemented with HP air. Anything above 80-85% N1 the LP bleed was enough to power the pack. From idle up to 80-85% N1, HP bleed air was mixed in to provide enough pressure.

Re: United Tries to Seat 2-,4-,6-Year Old Children Separate from Parents

Actually this story is NOT bs because she also happens to be in a Facebook group I am apart of and I actually helped her and gave her advice on this situation because I’m a former airline agent. So I gave her advice and it looked like it worked because the day I gave her the advice she got home. Ho...

Re: United Tries to Seat 2-,4-,6-Year Old Children Separate from Parents

Lois said they were not given a complimentary upgrade and that the family has proof of paying for the upgrade. The reservations changes happened at Heathrow on the outbound flight due to an administrative error by airport staff there, she claimed. I think we need more info about what happened in th...

Re: United Tries to Seat 2-,4-,6-Year Old Children Separate from Parents

4 adults and three kids, why do they need 7 seats together? Sounds like three groups of two would suffice.

Re: Updated: Aeroflot 1492 SSJ100 fire at Moscow (SVO) - 40+ confirmed dead

fpetrutiu wrote:

I think this video confirms my assumptions:

This looks very much like an uncontained engine failure that ruptured the wing tank. RIP to those that perished. Now at 41.

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

IF my theory is what happened on the last two blips (which I have no evidence to back up), I would think it more likely that one of the pilots hit the switch and saw that the trim wheel didn't move. Then blipped it again and saw it not move again. Problem with this theory is the FDR trace and the p...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

So at the exact point when MCAS is supposed to function (correctly) to assist a pilot approaching a possible high AoA/stall, the Boeing software is handcuffing the pilots by disabling the electric trim switches. THIS IS SURELY MADNESS :o The pilots can only trim down to 4.0 i.e. about 1 degree nose...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

At 05:39:57, the Captain advised again the First-Officer to request to maintain runway heading and that they are having flight control problems. What was the flight control problem at this point? There had not been any MCAS inputs yet. Up to this point there was stick shaker, Anti-ice Master Cautio...

Re: Aeromexico E170 wing strikes ground on takeoff (video)

Chuska wrote:

Looks like a major crosswind. The winds in ELP (not far from CUU) were gusting to 70 on Apr 10. That same storm system is burying the upper Midwest in snow now.

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Looking at the schematic, it's clear that power to the pilot's trim switches is disconnected when either of the cutout switches are set to cutout. Without power, I fail to see how either of the trim switches could possibly send a signal to be recorded in the FDR. Because you are thinking too "...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Fun fact; Other parts of the EASA type certificate read just like they were crafted by Boeing's PR dept. The increased safety provided by the Boeing design limits on the thumb switches ( for out-of-trim dive characteristics) provides a compensating factor for the inability to use the thumb switches...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Looking at the schematic, it's clear that power to the pilot's trim switches is disconnected when either of the cutout switches are set to cutout. Without power, I fail to see how either of the trim switches could possibly send a signal to be recorded in the FDR. Because you are thinking too "...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

How can you be knots out of trim? And do the forces also depend on an AoA sensor and again only on one? And what use is it, if the force overwhelms the pilot? For example, the aircraft is trimmed straight and level at 300 knots, the pilot pulls aft on the controls with no adjustment to trim or engi...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

It feels like the low hour FO didn’t understand the trimming system. Either he was trying the electrics and they weren’t responding because they were cut out, or he wasn’t turning the wheel more than a turn or two and since it barely has an impact with each turn he gave up on it. I dont know about ...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Perhaps there should also be a review of the amount of back pressure the column is able to produce, as part of the forces are produced by the system, being not really an indication of the forces on the elevator. That force comes from certification requirements though correct? 1lb for every 6 knots ...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Perhaps there should also be a review of the amount of back pressure the column is able to produce, as part of the forces are produced by the system, being not really an indication of the forces on the elevator. That force comes from certification requirements though correct? 1lb for every 6 knots ...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

This is what I was thinking early, but the FCC signals are cut by the F/O COL CUTOUT SW MOD and the FDR data show the column was handled with force. So the FCC signals was cut for sure but there is still the MCAS activation signal acting on the stab trim motor. The same observation is from JT610 an...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

(If this has been addressed somewhere in the previous 93 parts of this thread let me know and I will go hunt for it.) Regarding two of the criteria for MCAS to become active (the third is AoA input out of range): AP off and flaps up. I can understand AP off. The AP is not going to require the force...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

PixelFlight wrote:

My conclusion is that the MCAS send command by a completely different circuit not show in that schematic.

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

SheikhDjibouti wrote:

During the 30 min descent from altitude, MCAS attempted to operate sporadically (four times) with no effect. Another oddity.

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

I find it interesting that during the time that electric trim is turned off and they are unable to trim and fighting to raise the nose they find time to change the altitude setting and then the selected heading. Those dont seem real important when you're having flight control problems. Any insight o...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

The autopilot disengaging is likely to be due to the MCAS wanting to engage. After all, if you set your autopilot to a selection where you would cause a stall, you'd want it to disengage... not sure of the detailed logic of the 737 Autopilot in the realms of near stall, plus the addition of MCAS on...

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

What do you see in the report that makes you think that? I dont see it. I coulda missed it. Do you agree thats plausable? Ive never heard of the trim wheel not working. Though it isnt used much. When they captain asks if the trim is working and the the FO replies "no, should i try manual trim&...