Maint error on Airbus A321 and CFM engines. 2

[Alistair_Heaton]

https://assets.publishing.service.g...a63a/AAIB_Special_Bulletin_S1-2020_G-POWN.pdf

Thought some would find this interesting. Not least because it doesn't involve pilot error which is unusual for this level of incident. It was luck more than anything else that both engines didn't stop. Although the FADEC on the second engine will have been in emergency trash the engine mode.

Titan is what we call a white tail airline that only covers shortages in other airlines. They have a pretty good reputation amongst the pilot community, They get audited to hell by multiple organisations away from the official framework due to them being brought in as a wet lease. So all the big carriers audit them to be able to fly their routes at short notice.

Now Kathon is now banned it causes quiet a bit of issues with a lot of the European fleets grounded and parked up in hot places and no fuelling. Perfect breeding ground for the bio stuff in the tanks.

My knowledge on fuel tank quality and testing is limited to draining the tanks for water and signing a bit of paper after I have looked at the moisture test on the fuel bowser to say that its negative.

 

[Alistair_Heaton]

Gatwick wasn't where the biocide was added.

It was were the technician didn't get the right page in the manuals and follow the correct procedure after the engine difficulties were entered in the tech log.

The biocide part of the incident happened in another country to the UK. Cyprus is mentioned in the introduction which I can only presume either the technician was licensed through them or the maint was through a P145 maint organisation registered in Cyprus.

 

[LittleInch]

aaah, now read it carefully. The unknown maintenance base is where it got added two days beforehand following some "major maintenance".

Pity they don't say where.



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Alistair_Heaton]

these reports are not meant to point fingers of blame.

They are only to establish facts and guidance so it doesn't happen again.

Some countries shall we say stray away from this basic principle but the UK AIBB really doesn't. This does cause some legal issues with certain incidents which involve fatalities.

The Clutha pub in Glasgow helicopter crash and the Horsham display crash are prime examples of that.

Unfortunately the time scale of the process do cause a fair amount of distress to relatives. But in the long run it does promote safer air travel.

 

[Hoxton]

For those wondering why fuel tank trailers are called "Bowsers" in the UK ... Bowswers is a UK manufacturer of tanks and tank trailers. They supplied most of the RAF bases in the 39 - 45 war etc and the name became ubiquitous

 

[Alistair_Heaton]

And the mobile toilet service system is called either the shite bowser or honey wagon in the UK/scotland... And the operator the honey monster.

 

[waross]

The original Honey wagons in North America were horse drawn wagons that emptied the buckets in the outhouses in small towns.
I don't know how old the name is, but old.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[MacGyverS2000]

Whilst ppm is commonly volume, I still can't work out how he got to be 37 times the volume. I would have thought it would have been closer to 10 or 100 or 1000. Maybe he inputted litres into a program using gallons or something. who knows?

We can take random guesses...

6,200 kg of fuel, divided by 100 (missing ppm), is 62 kg. If he tried to divide by the specific gravity of the Kathon, he'd get 59.6 kg (or he may have just rounded off... not much difference in 62kg vs 60kg at those quantities). He put in 30 (per wing), should have put in 0.8, that's ~37x.

Dan - Owner

http://www.Hi-TecDesigns.com

 

[LittleInch]

It was 6,200 kg per each tank. But I think you're on the right path using mass.

I suspect though he put in 6200 lbs fuel into the convertor at 10,000 ppm (1%), got 62 lbs, then converted back to kg - 28.1 kg times density 1.04 = 29.3 kg

So yes either forgot it was 6,200kg per tank or input lbs somewhere thinking it was kg.

And got the ppm totally wrong using mass not volume never mind the order of magnitude error.

Well at least he made it back to Gatwick in one piece. I hesitate to think about where his flight path was if that had fallen out of the sky ( Over london somewhere I would have thought)

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[waross]

"Lost in translation?"

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[Alistair_Heaton]

Apparently this is the bit of kit you need to do it properly.

http://www.hammondscos.com/additive...portable-injection-systems/hydrant-cart-hc/#/