Incident: Malaysia A333 at BNE on Jul 18th 2018

[jb747]

No or false airspeed no cause for a prang? I like your optimism!

False airspeed is as good as no airspeed. Airspeed is a primary indicator for tech crew. Stick shaker could be going off when airspeed was actually normal, or overspeed etc, causing the pilots to take corrective action on false and misleading information.

False information is generally much worse than no information. As soon as you have no information you will try to get it, or interpret it, from other sources. But false information won't necessarily have you cross checking as quickly...you get to go further down the garden path

Block tubes can also affect altitude indicators, although it's not mentioned in this MAS incident.

Different sensors. Pitot tubes are airspeed, and they are what gives issues in Brisbane. Static ports are related to the altimeters, and I don't think they have the same problems with the wasps. From what I recall though, they were an issue with the ANZ A320 accident.

Precisely. I'm not sure of the weather at BNE, but I'm sure MAS landed safely due to other non-tech circumstances greatly in their favour. If the weather was bad, with lots of cloud, or if they were out over ocean... In normal operation these circumstances do not cause an aircraft to crash. With blocked tubes VFR becomes critical, and the tech crew would be flying blind.

To be honest, my only issue with MAS is that they took off like this. I could fly it IMC with this failure, and I see no reason why they would not be able to do so as well. Not as tidily as usual perhaps, but well enough.

 

[jb747]

warming up around here….

Fun...don't you think?

 

[Matt_01]

Personally I start to become interested in these type of threads. We have the enthusiast's, the spotter's and pilots all making comments.

I am pretty set in my ways and will always side with the pilots and whatever instructions they give as long as 1 take off = 1 landing that is what they are paid for. Stuff such as IFE and seat change complaints is noise from the masses.

 

[tgh]

To be honest, my only issue with MAS is that they took off like this

Other stuff may have been happening ; ppr says oil patch under the aircraft before take off.
Aircraft is (or was) still in bne… lots more info to come I opine

 

[tea&coffee]

To be honest, my only issue with MAS is that they took off like this. I could fly it IMC with this failure, and I see no reason why they would not be able to do so as well. Not as tidily as usual perhaps, but well enough.

Exactly so could I and that’s my point, we both know that it would be extremely rare for a airline crew to lose control of a plane with this issue, sure it’s very unusual and would get your heart rate up but to lose control and crash it would be a really bad day at the office. Also agree re taking it into the air - it would be pretty rare to not be looking at the speed tape during the roll well under 100kts - either something else was going on or there was a distinct lack of airmanship on the day - we’ll just have to wait 2 years for the ATSB to reliably inform us now

 

[RooFlyer]

ATSB investigation result on Malaysia A333 incident at BNE in 2018, as reported in today's Oz on-line.

Ignorance and forgetfulness blamed for Malaysia Airlines’ flight emergency (probably paywalled; try news.com.au)

Report here: https://www.atsb.gov.au/publications/investigation_reports/2018/aair/ao-2018-053/

The Australian Transport Safety Bureau has found forgetfulness, ignorance and a lack of diligence all contributed to what was almost a major aviation disaster at Brisbane Airport nearly four years ago.

On July 18, 2018, a Malaysia Airlines’ flight took off with all the aircraft’s pitot probes covered, which meant the pilots had no information about the A330’s airspeed.

The detailed ATSB report revealed no fewer than four people failed to notice or remove covers on the three pitot probes due to ignorance, lack of diligence or forgetfulness.

...

“There were effectively five walk-around checks required between the aircraft’s arrival and its dispatch, four of which did or should have taken place during the period in which the pitot probe covers were fitted,” the report noted.

“These were the engineering maintenance walk-around inspection, flight crew walk-around,

engineering pre-departure walk-around inspection and dispatch walk-around.”

Two of the walk-arounds were not done at all, while the Malaysia Airlines’ engineer saw the covers but then forgot to mention them.

During the flight crew walk-around a torch was shone towards the pitot probes but the pilot apparently did not see the covers which the report found lacked “conspicuity”.

...

Despite the major oversight, the aircraft still took-off from Brisbane without any airspeed information.

The ATSB report put that down to limited or ineffective communication between the captain and first officer when speed flags appeared on the A330’s primary flight displays.

“While independently trying to diagnose a rare and unfamiliar problem during takeoff, the flight crew experienced high cognitive workload, time pressure, and stress,” said the report. “This reduced their capacity to effectively interpret the situation and make a decision early enough to safely reject the takeoff.”

The flight climbed to an altitude of 11,000-feet as the pilots made urgent calls to Air Traffic Control and went through unreliable speed indication procedures.

 

[jb747]

Interesting. Glad they had a good FO.

 

[Quickstatus]

AF crashed because the PF at the time didn’t follow said processes

If it were just so simple....... "Didnt follow said processes" is very superficial (like saying the accident was because the driver didn't stop at the red light)- delve deeper and ask why.

Ive spent some time during the Covid lockdowns to delve into the subject of Human Factors. Surprisingly this area of knowledge is vast and has given me some food for thought into my own area of work.
Suggest read up a bit on this topic to get an insight into why errors occur especially at the human-machine interface.

Sidney Dekker is an excellent author in this area.

 

[jb747]

If it were just so simple....... "Didnt follow said processes" is very superficial (like saying the accident was because the driver didn't stop at the red light)- delve deeper and ask why.

Not posted for a while, so I suspect school has gone back.

 

[Quickstatus]

Not posted for a while

School? no school fees for some years now.
I believe AFF attendance is discretionary