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Search: Posts Made By: Swedish Steve
Showing results 1 to 31 of 31
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Forum: Rumours & News
14th Aug 2009, 20:03
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

We are barking up the wrong tree here. The...

We are barking up the wrong tree here.
The water in aircraft fuel tanks is not introduced by refuelling. It is normal when refuelling to take a sample from the bowser/dispenser. The apparatus to do...
Forum: Rumours & News
2nd Aug 2009, 21:26
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

No. the HP fuel pump is a gear type positive...

No. the HP fuel pump is a gear type positive displacement pump. Remember it is turned by the gearbox, so the speed is proportional to engine speed, and so therefore is the output.
Inside the FMU is...
Forum: Rumours & News
1st Aug 2009, 09:59
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Ice blockage of the FOHE inlet has been...

Ice blockage of the FOHE inlet has been demonstrated in lab testing. It was not expected and operational procedures have been introduced to alleviate it. RR has designed a new FOHE which is now...
Forum: Rumours & News
4th Mar 2009, 09:02
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Sooty, I see you have worked for RR so I must bow...

Sooty, I see you have worked for RR so I must bow to your knowledge. I only know what I was taught on the AMEL course, and read in the AMM (which is a bit basic on the B777)

The last iteration of...
Forum: Rumours & News
3rd Mar 2009, 10:07
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Sorry sooty but the AMM doesn't agree with you ...

Sorry sooty but the AMM doesn't agree with you
AMM 79-20
* Oil pressure relief bypass valve
If the engine oil is too cold or the heat exchanger oil core is
clogged, the pressure relief bypass...
Forum: Rumours & News
1st Mar 2009, 19:11
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

On the Trent the FOHE is always on. There are no...

On the Trent the FOHE is always on. There are no controls at all on the fuel flow side, and there is only a bypass on the oil flow side to enable to oil to bypass at very low temp (when the oil is...
Forum: Rumours & News
22nd Oct 2008, 09:50
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Yes. On the Trent, the Fuel passes through the...

Yes. On the Trent, the Fuel passes through the FOHE first when it enters the engine. So there is a chance that any ice could block the passages in the heat exchanger. In the GE the fuel goes through...
Forum: Rumours & News
11th Sep 2008, 19:36
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

They will not resell fuel because they don't know...

They will not resell fuel because they don't know what it is. It may come out of an airliner tank but it will be a mix of Jet A and Jet A1 and even Chinese fuel. So they give it back to the airline...
Forum: Rumours & News
10th Sep 2008, 15:23
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Yes it detects the boundary. The transmitter is...

Yes it detects the boundary. The transmitter is very low in the tank so it is usually immersed in fuel, and the beam goes down to the bottom surface and back.
Forum: Rumours & News
10th Sep 2008, 07:43
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Each tank has a water sensor. This works by...

Each tank has a water sensor. This works by sending a signal down through the fuel which is reflected off the tank bottom surface. The time the signal takes to make the journey is measured. If there...
Forum: Rumours & News
8th Sep 2008, 09:35
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

It is obvious to me that the centre tank contents...

It is obvious to me that the centre tank contents is warmer than the wing tanks. The centre tank is emptied on every flight. The tank has packs under it, a warm cabin above it and a lukewarm freight...
Forum: Rumours & News
7th Sep 2008, 19:14
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

The FOHE is not regulated. There are bypass...

The FOHE is not regulated. There are bypass valves in case of blockage, but no regulation. There is an Air cooled Oil cooler also in the system which is controlled by the FADEC to regulate the oil...
Forum: Rumours & News
6th Sep 2008, 19:06
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

I sump fuel tanks on aircraft. We drain out about...

I sump fuel tanks on aircraft. We drain out about a litre into a clear plastic container, and you might see a globule at the bottom of the bottle, less than 1cc. Sometimes you find nothing. So a...
Forum: Rumours & News
27th Jul 2008, 20:41
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

There is no fuel ice message on the B777. There...

There is no fuel ice message on the B777.
There is a water in fuel message. However this is never presented to the crew. It is hidden away at the bottom of the fuel qty maint page which few people...
Forum: Rumours & News
1st Jul 2008, 19:26
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

More than a rumour. One engine failed to respond...

More than a rumour. One engine failed to respond to throttle demands in cloud. Other engine OK. Both OK when leaving cloud.
Sorry don't ask, thats all I know.
Forum: Rumours & News
10th Jun 2008, 07:19
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Wing boost pumps ON. Start engines and run at...

Wing boost pumps ON. Start engines and run at idle-
Turn off APU (to disable APU boost pump)
Switch off all 4 boost pumps.
Engine shall run at idle for 5 minutes.
If not look for leaks in suction...
Forum: Rumours & News
14th Apr 2008, 20:00
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

If you look at my picture, the centre tank starts...

If you look at my picture, the centre tank starts where the frost ends, and goes right across the aircraft. The wing/body fairing covers the centre part of it completely.
Forum: Rumours & News
14th Apr 2008, 15:25
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

http://www.airliners.net/uf/536904336/phpElb51J.jp...

http://www.airliners.net/uf/536904336/phpElb51J.jpg

Took this this afternoon. A B777-200ER of Malaysia airlines just parked on the ramp at ARN after an 11 hour flight. This frost cover on the...
Forum: Rumours & News
14th Apr 2008, 07:22
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

CONFiture The wing fuel tank on the B777...

CONFiture

The wing fuel tank on the B777 goes a long way inboard of the strut.

I can't comment on how often frost is seem while aircraft are landing, but I do meet B777 every day on the ramp at...
Forum: Rumours & News
27th Feb 2008, 12:46
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

NSEU Quote: "If a pressure difference...

NSEU

Quote:
"If a pressure difference opens the valve.. I assume this means either way."
Never assume, Steve

Yes good idea, but the B777 AMM are very sketchy on a lot of descriptions, and...
Forum: Rumours & News
27th Feb 2008, 11:47
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

NSEU Can't find any reference to vent negative...

NSEU
Can't find any reference to vent negative pressure relief regarding the surge tank vent valve in the Boeing 777 Maintenance Manual D&O. Is it mentioned in the (proper) AMM? Wouldn't the float...
Forum: Rumours & News
27th Feb 2008, 11:39
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

777FLY the only other way in which the fuel...

777FLY
the only other way in which the fuel system can be open to the air is via the fuel jettison nozzle valves. If these were to somehow be signalled to open, there would be a large diameter pipe,...
Forum: Rumours & News
26th Feb 2008, 07:34
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

NSEU The leakage would have occured after the...

NSEU
The leakage would have occured after the spar valves, perhaps in the strut area, prior to the fuel pumps and FMU: The FMU has a high pressure shut off valve, so if this was closed, the leakage...
Forum: Rumours & News
25th Feb 2008, 10:56
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

snanceki What prevents the CWT pumps from...

snanceki
What prevents the CWT pumps from restarting due to aircraft attitude change once they have initially shut down due to the 9000kg limit being reached. Presumably the answer is nothing.
...
Forum: Rumours & News
25th Feb 2008, 09:11
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Snanceki.. How does fuel get from the CWT to...

Snanceki..
How does fuel get from the CWT to the engines?

a. Via the wing tanks (i.e.pumped from CWT into the wing tanks then out again using the wing tank pumps) OR
b. direct from the CWT to a...
Forum: Rumours & News
24th Feb 2008, 10:40
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Fullwings Quote: I cannot see any reference...

Fullwings
Quote:
I cannot see any reference to a 15 sec T/D or ELMS auto shut off.

I've had a further browse through the manuals and this appears to have come about through an update in 2006...
Forum: Rumours & News
24th Feb 2008, 07:41
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

NSEU Steve.... I think I'm looking at the...

NSEU
Steve....
I think I'm looking at the same blurry picture from the AMM, but enlarging it, I don't see the CT water scavenge system hooked up to wing tank pumps. So, with the CT O/J pumps OFF, I...
Forum: Rumours & News
23rd Feb 2008, 18:18
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

When using the ctre tank do they on the 777...

When using the ctre tank do they on the 777 switch off the pumps with 500kg remaining in the tank as is done on 75/76's due the alleged problems with fuel pumps. On the 76 this amount gets scavenged...
Forum: Rumours & News
23rd Feb 2008, 16:45
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Are “centre tank pump1, 2 running normally”...

Are “centre tank pump1, 2 running normally” recorded FDR parameters?
Are the centre tank push-buttons positions recorded?
Would failure of the CT pump pressure sensors be recorded?


Fuel pump...
Forum: Rumours & News
22nd Feb 2008, 14:50
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

You say that the CTR tank water scavenge pumps...

You say that the CTR tank water scavenge pumps are ALWAYS running.

But you also state that their "power supply" comes from the tank booster pumps outlets.

My question is then - how can the...
Forum: Rumours & News
22nd Feb 2008, 10:32
Replies: 3,239
Views: 1,137,481
Posted By Swedish Steve

Some observations on the B777 fuel system ...

Some observations on the B777 fuel system

The centre tank is a large relatively flat based structure. The centre tank pump inlets are uncovered at about 900kg fuel remaining. The centre tank water...
Showing results 1 to 31 of 31


 
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