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Search: Posts Made By: 777fly
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Forum: Rumours & News
22nd Oct 2008, 00:18
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Winter is upon us, so maybe we will see a...

Winter is upon us, so maybe we will see a repetition of BA 038. But then, maybe not. I have flown BA038's profile before without mishap, so why did that accident happen just once?

I do not support...
Forum: Rumours & News
11th Sep 2008, 10:43
Replies: 3,239
Views: 1,137,464
Posted By 777fly

snanceki: I think your question has been...

snanceki:

I think your question has been answered above. No further comment required from me.........
Forum: Rumours & News
11th Sep 2008, 00:07
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Sorry DC-ATE, but I disagree. Retracting flap...

Sorry DC-ATE, but I disagree. Retracting flap from 30 to 25 on a 777 has virtually no effect on lift, changes the stall speed by a negligible amount, but considerably reduces drag. In the energy...
Forum: Rumours & News
10th Sep 2008, 22:10
Replies: 3,239
Views: 1,137,464
Posted By 777fly

It has been suggested in this thread that crews...

It has been suggested in this thread that crews are not trained to cope with a total loss of power at low altitude. I would propose that this is not so. Just consider the regular practice, in the...
Forum: Rumours & News
8th Sep 2008, 12:07
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Grebllaw123d: In answer to your question, I...

Grebllaw123d:

In answer to your question, I suggest you read the whole thread again.There are plenty of alternative suggestions as to the cause....
Forum: Rumours & News
4th Sep 2008, 14:29
Replies: 3,239
Views: 1,137,464
Posted By 777fly

CNN airing a news bulletin at 1430Z concerning a...

CNN airing a news bulletin at 1430Z concerning a new update on the BA038 accident. Fuel icing cited, but awaiting full report....
Forum: Rumours & News
16th Aug 2008, 23:58
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Green Dot: I repeat my theory here, since...

Green Dot:

I repeat my theory here, since you mention the suction bypass system. Boeing acknowledge that gas or air can be trapped in the suction line and cause flame out or thrust reduction under...
Forum: Rumours & News
15th Jul 2008, 22:28
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Moderator, You recently deleted some of...

Moderator,

You recently deleted some of these rubbish comments and my dismissive reply to same. Kindly continue the good work.........
Forum: Rumours & News
1st Jul 2008, 19:01
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Hot rumour at LHR this morning that there has...

Hot rumour at LHR this morning that there has been another 777 engine roll-back.
Forum: Rumours & News
12th Jun 2008, 07:57
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Airfoilmode: No, I am not suggesting that...

Airfoilmode:

No, I am not suggesting that the suction system has its own fuel supply line. There is a short section of pipe that joins the main fuel supply manifold, via a check valve, just...
Forum: Rumours & News
11th Jun 2008, 17:23
Replies: 3,239
Views: 1,137,464
Posted By 777fly

It is interesting that the FAA are now looking at...

It is interesting that the FAA are now looking at the suction feed.Here is my post from way back, which may be an explanation:

There is actually one instance in which Boeing suggest that a fuel...
Forum: Rumours & News
9th Jun 2008, 16:18
Replies: 3,239
Views: 1,137,464
Posted By 777fly

You might like to refer to my posts, some pages...

You might like to refer to my posts, some pages ago, concerning the possibility of trapped air in the fuel suction feed disrupting the fuel supply when released.

Page 28 post 555 para 4. If I...
Forum: Rumours & News
26th May 2008, 21:00
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Pinkman Re your post: ' a couple of us have...

Pinkman Re your post:
' a couple of us have repeated endlessly our prediction that it was due to fuel stratification caused by unusual temperatures leading to.....'

If this were so, the problem...
Forum: Rumours & News
24th May 2008, 16:17
Replies: 3,239
Views: 1,137,464
Posted By 777fly

There appears to be an impression amongst some...

There appears to be an impression amongst some that the environmental conditions experienced by BA038, prior to the accident, were unique or unusual. Rare, I agree, but not unusual. BA operate a...
Forum: Rumours & News
4th Mar 2008, 19:05
Replies: 3,239
Views: 1,137,464
Posted By 777fly

wilyflier: Yours is as good a speculation as any...

wilyflier: Yours is as good a speculation as any other.
Forum: Rumours & News
4th Mar 2008, 13:06
Replies: 3,239
Views: 1,137,464
Posted By 777fly

wilyflier: Quote: " The uplift was mostly in...

wilyflier:

Quote: " The uplift was mostly in the CTW tank with the wing tanks topped off".
This could not be the case. The aircraft would have arrived with, at a guess, 15000kgs (total) in the...
Forum: Rumours & News
3rd Mar 2008, 04:09
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Rightbase: "Climbing in cloud brings water into...

Rightbase: "Climbing in cloud brings water into the centre tank"
How does that happen? During the climb the air in the centre tank will be venting overboard as it expands due to reducing external...
Forum: Rumours & News
2nd Mar 2008, 14:37
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Thanks Jetdoc. So if the suction bypass valves...

Thanks Jetdoc. So if the suction bypass valves are simply check valves, at any time the pressure of air trapped in the suction pipe exceeds the fuel manifold pressure, they should open and allow the...
Forum: Rumours & News
2nd Mar 2008, 06:17
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Jetdoc: Your observation does not neccessarily...

Jetdoc: Your observation does not neccessarily invalid my theory. There is no way of knowing what pressures would be reached in the suction pipe ( would Boeing have checked it under all conditions?)...
Forum: Rumours & News
1st Mar 2008, 23:43
Replies: 3,239
Views: 1,137,464
Posted By 777fly

I am not sure that there are any software...

I am not sure that there are any software implications in this incident. The AAIB report makes it clear that the engine software and systems responded correctly but there was a problem with the fuel...
Forum: Rumours & News
28th Feb 2008, 03:37
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Jetdoc, Thank you for the further...

Jetdoc,

Thank you for the further information. How do the refuel valves function physically and where are they in the main (wing) tank? I recall that they are powered open during refuelling. If...
Forum: Rumours & News
27th Feb 2008, 18:55
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Jetdoc, I had forgotten that the jettison...

Jetdoc, I had forgotten that the jettison manifold also acted as the refuel manifold. If there are NRVs in the pumps at the tank end of the manifold in each tank, where does the fuel get into the...
Forum: Rumours & News
27th Feb 2008, 18:04
Replies: 3,239
Views: 1,137,464
Posted By 777fly

JetDoc, my last entry crossed with yours. If the...

JetDoc, my last entry crossed with yours. If the main tank jettison pumps do indeed have NRVs, I retire my argument.

One last question: are the NRVs fitted to these pumps on G-YMMM? Worth a look,...
Forum: Rumours & News
27th Feb 2008, 17:54
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Thank you for the illustration of the (non B777)...

Thank you for the illustration of the (non B777) tank pump. Can JetDoc or anyone produce the same for a B777 Main Tank Jettison pump?
Forum: Rumours & News
27th Feb 2008, 17:31
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Blues&Twos Cavitation 'could' have occurred at...

Blues&Twos Cavitation 'could' have occurred at any other time? Maybe, but why would it during years of normal operation? If 2 engines lose power due to lack of fuel to the HP pumps, it is almost...
Forum: Rumours & News
27th Feb 2008, 15:20
Replies: 3,239
Views: 1,137,464
Posted By 777fly

JetDoc, Thanks for the tech info. I am not...

JetDoc,

Thanks for the tech info. I am not sure that the pump inlet screens would be relevant to my argument , but if the three wing tank pumps ( fwd/aft/jettison) all have...
Forum: Rumours & News
27th Feb 2008, 14:20
Replies: 3,239
Views: 1,137,464
Posted By 777fly

Thanks JET11 for the fuel diagram, very helpful...

Thanks JET11 for the fuel diagram, very helpful but notable that it does not show the position of the wing tank jettison pump. It is a fair bet that its location and pickup point is close to the fwd...
Forum: Rumours & News
27th Feb 2008, 03:59
Replies: 3,239
Views: 1,137,464
Posted By 777fly

From the latest AAIB update, it is clear that the...

From the latest AAIB update, it is clear that the problem was either fuel starvation or fuel aeration. As far as I can see, there has been plenty of speculation about fuel stavation/ icing but little...
Showing results 1 to 28 of 28


 
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