So by your reasoning the FDR can’t tell what position any switch is in, only the result down stream based on the current in the circuit? No. That isn’t how it works. I was wrong then. Thought it was obvious when the circuit comes alive the FDR captures it as RUN and also when it is CUTOFF, whether ...

The preliminary did not mention a crime (@BTD and others).

planenuts wrote: ↑Wed Jul 16, 2025 4:47 pmventilation process?

The automatic relight sequence must also include shutting it OFF for a second (that same fuel shutoff valve circuit) , no?

Right BTD .. but you may be under an impression that the FDR records only what the switches themselves are doing. It would have to be the current that is going through those wires to move the fuel valves from either source (automation or those master switches). I can’t imagine how else it would work...

If the core got abruptly colder/slower the EEC would sense relight in order and automation then cuts fuel for the ventilation process preceding ignition/RUN. Sounds to me like no pilot switching is therefore required for that; being the same circuit the FDR would then have to be capturing this as th...

Why hadn’t anyone piped up then yet that the fuel CUTOFF “transitioning” can simply be automatic restart stemming from a potential dual failure (splash out/flameout) possibility ? The EEC would sense that in a blink of an eye. Edit: There is always caution to remove water from fuel, at all stages of...

These GEnx 687-8 engines have an automatic relight feature; if they were doused somehow (a flameout), that auto-sequence starts off by first cutting fuel for ventilation and then re-introducing it again for the re-ignition process. Yikes — at first glance didn’t see it — it looks like with that syst...

When trying to describe anything more difficult, unless presenting with some semblance of reasonable effort it will quickly get rejected … every time! Looking back: A British airshow aircraft (tragedy) over Toronto harbour did a sequence TIGHT turn (similar?) out of the ordinary 16 years earlier Sep...

OK, you gotta remember though, the main reason why an operator wants to go easy on their engines is for their longevity; but also sometimes for fuel savings, emissions reductions and noise reduction.

(0lder accident thread) The way you concluded it there seemed quite satisfactory, …nothing really to add, Noticing this though: A few of my colleagues and I witnessed the incident but won't say what we saw in fear of speculation. As was mentioned in another thread, it should be perfectly OK to discu...

One can wonder though … what happens to that guy/gal that blew the whistle on this long-running home base fuel thievery/tampering outfit just after AI-315 had its fuel filter alert June 16 (95.4 hours after this tragedy). For example, would there be something like the witness protection program avai...

The fact that clean water can get through a filter system to affect engines on a takeoff isn’t impossible if common knowledge that some always present. At say a gal of fuel per engine used up/injected in there per second on takeoff a drop wouldn’t be noticeable; but if a whole cup (filtered/not cont...

Take a look at AI187; it loses 900’ down to 21-2200’ (close one EH?)

Edit … UTC day/time june 14 / 22:46 … 3.am local June 15/2025 (av herald)

I don’t see evidence of any negligence here (not yet at least); IMO it’s got to be a fluke of some kind, or combination of, a thrust deficiency that got them (the Pic and/or the Captain). I know everyone is now waiting … edge of their seats … me too.

At terminal location (189ft) how high up is the temperature gauge itself situated ? 4.8m I understood at major airports the height of the anemometer is a min 33ft high (10m), but wasn’t aware of the temp or barometer. EDIT! ((Can we import a smoke photo image such as the one “taken from a distance”...

A WTF Accident (SpyPilot tm)

clearly shown

The wingspan, and some; that looks more like 300’. It definitely appears lower than suggested on early data (the top of the tailfin, the nose, wingtips … yeah they’re scratching 300’ for sure)

Checkhla/Sanand wundermap weather station O310 ISANAN83: Noting the data from 2:30pm to allow for airmass (the extreme heat/dry inversion air nearing 45C plus from NE) travel southward/westward from above AMD accident/sequence-start location. Also, using the 29.76 Chekhla barometer reading can inter...

180ft ASL at departure end (AMD 05 thresh/skyvector-info). At terminal location (189ft) how high up is the temperature gauge itself situated ? 4.8m Down on the river water-elev is 40m ASL, which, then it would be 21-22m (70ft) lower than the airport thermometer readings. For that DA (at-rotation DA...

180ft ASL at departure end (AMD 05 thresh/skyvector-info).

At terminal location (189ft) how high up is the temperature gauge itself situated ?

If the crash was the result of performance due to atmospheric conditions, then it's because of incorrect loading and/or incorrect programming where the airplane was configured for failure. Looking at some of the higher groundspeeds (see max tire-speed discussions Bolivia/la pas) needed at high alti...

So this will drag down a B787-8 …. (?) Was that a question ? And, I’m sorry about being so blunt .. was so entrenched in searching the pertinent data for preparing that explanation. Answer to your statement is determined no by general consensus here so far. Now it’s also a matter of understanding (...

cncpc wrote: ↑Sat Jun 14, 2025 3:25 pmThere is some brief moment at liftoff where the "dust devil" has the appearance of a wing tip vortex.

Was the previous departure close ahead of it?

Pdw…transport category performance data has very conservative assumptions built in to cater for environmental changes, pilot techniques, etc. For example the performance is calculated with 50% of the reported headwind, 150% of the tailwind … Component on the nose is nearing zero (maybe two knots) a...

Was farm operator/manager now looking after grandkids, selling 2ton tree-moving spades on the side. Pdw…transport category performance data has very conservative assumptions built in to cater for environmental changes, pilot techniques, etc. For example the performance is calculated with 50% of the ...

Look at a Koch chart (and the example they give you when you google it) Try adding in a 10kts ENE inversion shear (DPS), showing up from northeast (Indore/1850ft elev or from Kota at 896ft 46C/115F noon and from Udaipur 1684ft 107F/43C … adding lapse rate makes it hotter. How does that affect climb ...

We always took off full power, but that’s never been the case with jets esp these big giants. However the performance calculations used are still relying on the same principles we’ve learned so well. We’ll soon see something concrete about those engines, hopefully.