A 737/500 down in Indonesia ?

**JDNSW** · 11th January 2021, 01:08 PM

Heard on the radio while going to pick up my mail that the fuselage has been located. And yes, the water depth is less than 20m. I'm not sure what the bottom is, but it could be pretty muddy.

This water depth is plenty to have slowed it to very low speed by the time it hit the bottom - nearly all the damage will be from impact with the water, and it won't be all that deeply buried, if at all (depends on whether it is mud or sand).

**Old Farang** · 15th January 2021, 06:37 PM

Flight data from crashed airliner in 'good condition'

Flight data from crashed airliner in 'good condition' (bangkokpost.com)

JAKARTA: Indonesian investigators have successfully downloaded information from the flight data recorder (FDR) of the Sriwijaya Air jet that crashed into the sea last week, its transport safety agency said on Friday.

The recorder "has 330 parameters and all are in good conditions," the National Transportation Safety Committee (KNKT) said in a statement, referring to the available data.

**Tins** · 15th January 2021, 11:12 PM

Originally Posted by Hugh Jars

Yes, it’s looking more like an airspeed unreliable event, leading to a stall.
I understand the DFDR and CVR have been retrieved.

Astonishing to hear uninformed people talking of the MCAS system being at fault, when the 737-500 isn't fitted with MCAS.

Hugh, unreliable airspeed indications are caused mostly by failure in the pitot static systems? Is that correct?

**Eevo** · 15th January 2021, 11:22 PM

Originally Posted by Tins

Astonishing to hear uninformed people talking of the MCAS system being at fault, when the 737-500 isn't fitted with MCAS.

Hugh, unreliable airspeed indications are caused mostly by failure in the pitot static systems? Is that correct?

failure or maybe the cover was left on.

**Tins** · 15th January 2021, 11:31 PM

Originally Posted by Eevo

failure or maybe the cover was left on.

Well, it wouldn't have been icing I guess, but insects? All that means ( speculative at this time of course ) is that the PFI wasn't carried out properly, which is of course crew error. I always hope that this isn't the case, but it so often is.

**Eevo** · 16th January 2021, 02:32 AM

Originally Posted by Tins

Well, it wouldn't have been icing I guess, but insects? All that means ( speculative at this time of course ) is that the PFI wasn't carried out properly, which is of course crew error. I always hope that this isn't the case, but it so often is.

icing unlikely at the attitude they were at,
ive read insects can nest in under ten min, but pretty rare.

**JDNSW** · 16th January 2021, 05:38 AM

Even rarer would be for it to happen to both pitot tubes. Complete speculation, but wasn't there some sort of issue with the tailplane trim jack on early 737s?

**Eevo** · 16th January 2021, 09:55 AM

Originally Posted by JDNSW

Even rarer would be for it to happen to both pitot tubes. Complete speculation, but wasn't there some sort of issue with the tailplane trim jack on early 737s?

there was, but wasnt that fixed 20 years ago?

**superquag** · 16th January 2021, 10:02 AM

Originally Posted by Eevo

there was, but wasnt that fixed 20 years ago?

Horrible feeling IF this was somehow mis ed over the decades.... Unlikely, but wait till it's ruled out, To be Sure...x2...

I've got a pet theory, but again, discretion till more info comes out. Finding the CVR intact would be a Good Thing.

**101RRS** · 16th January 2021, 11:40 AM

Originally Posted by superquag

I've got a pet theory, but again, discretion till more info comes out.

Why - this is a forum of peoples ideas - not necessarily facts. This place is not a formal investigation - if we get it wrong on AULRO does it matter.

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