... Aberdeen Airport, 11 September 2021...

... During the manually flown go-around, which was initiated at 2,250 ft amsl, the aircraft initially climbed, but just before it reached the cleared altitude of 3,000 ft amsl it began to descend. It descended to 1,780 ft amsl (1,565 ft agl) with a peak rate of descent of 3,100 fpm, and accelerated to an airspeed of 286 kt (the selected airspeed was 200 kt) before the crew corrected the flightpath. The aircraft descended for a total of 57 seconds before the climb was re-established. It is likely that the crew allowed the aircraft to descend unnoticed having become overloaded by the high workload during the go-around...

Is the Boeing cockpit a much higher workload than for Airbus?

I do have my suspicions that the Boeing cockpits, that are contrived to remain working to 1960's standards, are an unnecessary danger compared to more modern designs that have learnt from over a half-century of flying!...


Fly safe folks!
Martin

Boeing has been hit with a worldwide safety alert after British security experts say they discovered a possible flaw in its software used by pilots in take-offs and landings.

A global “safety alert for operators” was issued by the US Federal Aviation Administration earlier this month after researchers found an issue with Boeing’s Onboard Performance Tool (OPT), a mobile app that pilots can use to make safety calculations before take-off and landing.

The tool uses data on metrics such as weather and weight to help make calculations for planes leaving and returning to the tarmac.

The possible flaw meant hackers could ­tamper with critical data and trick pilots into using the wrong settings, potentially causing a crash.

Pen Test Partners, based in Buckinghamshire, discovered the potential issue and reported them to Boeing. Ken Munro, boss of Pen Test Partners, said their findings showed that the mobile app could have been “calculating and putting out the wrong data” to pilots.

On the data security front - the vast majority of non-military users use weather data that comes either directly, or indirectly, via the internet. The reason is primarily that "the internet" give access to world wide data at quite high resolution both current and within suitable timescales (a few hours to a day).

What had been billed "Europe's biggest fireworks display" had been organised for Saturday evening to celebrate St Stephen's Day - the national holiday,

But seven hours before the scheduled start, the government postponed the event, citing extreme weather warnings.

The weather, however, stayed calm - leading to the sackings of the head and deputy head of the weather service.

... "somewhat poor" FMC human interface...

An attempt at a lift-off on Monday had to be scrubbed when one of four engines on the vehicle would not cool down to its required operating temperature.

After reviewing data, engineers believe they now understand why the issue occurred. They think it is likely related to an inaccurate sensor reading...

... develop a strategy to deal with the problem on launch day. This involves starting the process of chilling the engines earlier in the countdown...

... On Monday, sensor readings suggested the engine was 15-20 degrees C short of where it needed to be. Engineers believe the bleed-through system was working properly; it was just that the sensor system didn't accurately reflect real temperature conditions. The engineering team plans to start the cooling process about 45 minutes earlier in Saturday's countdown, hoping this will bring everything into line...

I believe that this is being operated by Boeing...

... NASA’s prime contractors for SLS include Aerojet Rocketdyne, Boeing, and Northrop Grumman...

See:

Artemis Partners wrote:

... NASA’s prime contractors for SLS include Aerojet Rocketdyne, Boeing, and Northrop Grumman...

... And of those, I'm sure Boeing is the "lead"...

... avoiding safety issues is quite sickening.

... intentionally avoiding safety issues is quite sickening.

... Boeing did get pegged to build the frame of the core stage that the working parts bolt onto...

"The SLS core was unexpectedly complex and required a full redesign over that of the STS central tank...": Long time and expensive...

A Green Run test failed due to a hydraulic power unit failing. The Green Run had to be rerun.

Repeated hydrogen leaks for what is a copy of the proven hardware from STS.

Now... Those aspects can be expected, but at what cost?

And such equipment fails are usually caught early on during design and test...

And now... We have chill-down temperature readings that are claimed to be faulty... Again, when such equipment is normally tested well in advance precisely to avoid costly delays/interruptions.


For the latest 'anomaly':

Is it really that somehow a temperature sensor is giving a partial and inaccurate reading?

Or is there some other real underlying problem such as inadequate available bleed cooling?

To my mind, this does all rather suggest cost-cutting/corners-cutting (or dangerous sloppiness)... Which for my suspicions does appear to be a consistent signature of Boeing cutting back on the disruption caused from allowing the QA people to do their job... For which Boeing does have a highly publicized adverse record.

I really hope that there is not going to be a Management Fudge and "Wing it" to push this one off the launch pad regardless.

This flight test really does need to work astronomically better than the Boeing Starliner fiascos...


Fly safe?

Here's hoping!
Martin

For the latest 'anomaly':

Is it really that somehow a temperature sensor is giving a partial and inaccurate reading?

Or is there some other real underlying problem such as inadequate available bleed cooling?

For the latest 'anomaly':

Is it really that somehow a temperature sensor is giving a partial and inaccurate reading?

Or is there some other real underlying problem such as inadequate available bleed cooling?

Since the RS-25 engine is a Aerojet Rocketdyne product, flew on the Shuttle before Boeing had an aerospace division, and there were no issues in the multiple test firings, somehow I suspect a bad sensor part from some tiny sensor maker, but you go ahead and continue to bash Boeing ...

The RS-25s have a remarkable reliability.

Boeing is responsible for adding the bits around that engine to make it go.