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Search: Posts Made By: madrock
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Forum: Rotorheads
10th Feb 2010, 14:21
Replies: 1,998
Views: 558,645
Posted By madrock

Variable Load, The S-92 is a machine....

Variable Load,

The S-92 is a machine. Whether I like it or not is irrelevant. Whether you care is irrelevant.

We should stick to the facts that are causing a concern :

1) Mounting foot...
Forum: Rotorheads
6th Feb 2010, 19:19
Replies: 1,998
Views: 558,645
Posted By madrock

..with all due respect, if you are both S-92...

..with all due respect, if you are both S-92 AME's some catch-up reading on notices from the OEM will help clarify the number..........
Forum: Rotorheads
5th Feb 2010, 15:16
Replies: 1,998
Views: 558,645
Posted By madrock

Here we go again, it's "only" happening in the...

Here we go again, it's "only" happening in the North Sea and Canada, you pilots must be doing something different.:ugh:

...sounds more like to relieve the stress on Sikorsky "whilst the issue is...
Forum: Rotorheads
2nd Feb 2010, 03:04
Replies: 1,998
Views: 558,645
Posted By madrock

Hi Max, I haven't seen anything conclusive on...

Hi Max, I haven't seen anything conclusive on root cause, although if you were confident enough to say you expect it to happen again but the problem is benign you should have an excellent...
Forum: Rotorheads
1st Feb 2010, 20:23
Replies: 1,998
Views: 558,645
Posted By madrock

What about the MGB replacements when a crack is...

What about the MGB replacements when a crack is found at the mounting foot - are the new MGB castings any different than the one they're replacing ?
Forum: Rotorheads
29th Jan 2010, 17:45
Replies: 1,998
Views: 558,645
Posted By madrock

gearbox cracks a "benign" issue ?

If it had been discovered over a year ago you had indications which could lead to potential serious heart problems and a team of specialists had been working since to determine the cause and the...
Forum: Rotorheads
27th Jan 2010, 23:55
Replies: 1,998
Views: 558,645
Posted By madrock

This quote from the link posted in #611 above : ...

This quote from the link posted in #611 above :



Questions :

1. What other loading conditions are they referring to ?
2. Is this a failure in the original design, or a failure as a...
Forum: Rotorheads
6th Jan 2010, 02:21
Replies: 1,141
Views: 303,470
Posted By madrock

from The Canadian Press today (Telegram online)

"The families of passengers who died in the crash of a Sikorsky helicopter off the coast of Newfoundland last year, as well as the sole survivor of the tragedy, have reached a settlement in their...
Forum: Rotorheads
30th Dec 2009, 02:00
Replies: 1,141
Views: 303,470
Posted By madrock

from the 2009 December 21st (effective date) AD :

"
SUPPLEMENTARY INFORMATION: This amendment adopts a new AD for the Sikorsky Model S-92A helicopters. This action requires a one-time visual inspection of the MGB lube system filter assembly for oil...
Forum: Rotorheads
2nd Dec 2009, 12:16
Replies: 1,141
Views: 303,470
Posted By madrock

Has the cause of the cracks appearing in the MGB...

Has the cause of the cracks appearing in the MGB mounting feet been determined yet ?
Forum: Rotorheads
30th Nov 2009, 00:38
Replies: 64
Views: 11,279
Posted By madrock

Some interesting wording excerpts from a fairly...

Some interesting wording excerpts from a fairly recent (Dec.2006) SAC international patent application document filed with WIPO :

" ..............
.......The United States Department of Defence...
Forum: Rotorheads
29th Nov 2009, 00:32
Replies: 64
Views: 11,279
Posted By madrock

Crab, On the Sea King, what's the indicator/s...

Crab,
On the Sea King, what's the indicator/s of uncontained oil loss - temp, quantity, both ? If 150 degrees C is the maximum allowed after ELS activation, what flight constraints (Tq/V/Alt...
Forum: Rotorheads
28th Nov 2009, 20:33
Replies: 64
Views: 11,279
Posted By madrock

Does anybody have any hard information regarding...

Does anybody have any hard information regarding what the limiting design factors are with regard to expected (and demonstrated) extended MGB running time on the S61, 225, or any other type/s (and...
Forum: Rotorheads
24th Nov 2009, 22:52
Replies: 1,141
Views: 303,470
Posted By madrock

One of the lingering issues following on the...

One of the lingering issues following on the March accident seems to be why, after the Broome incident, was there such an apparent delay allowed before the problem had to be addressed in the field by...
Forum: Rotorheads
24th Nov 2009, 15:27
Replies: 1,141
Views: 303,470
Posted By madrock

victorpapa, Not a stupid question, in fact...

victorpapa,

Not a stupid question, in fact very pertinent as to concerns over how these probability calculations are done.

If you do a calculation prior to entry into service, then in...
Forum: Rotorheads
24th Nov 2009, 12:09
Replies: 64
Views: 11,279
Posted By madrock

TopEndTorque, Exactly ! ...

TopEndTorque,



Exactly !

Industry's just got to make some decisions :

Do you need run dry (uncontained oil loss) redundancy ?
If yes, how much, i.e. 10,30,60,90 mins etc..?
Forum: Rotorheads
24th Nov 2009, 11:54
Replies: 1,141
Views: 303,470
Posted By madrock

Sven, A Sikorsky rep. was recently...

Sven,



A Sikorsky rep. was recently quoted ""Analysis shows the aircraft can operate safely for a minimum of 10 hours, even assuming a full mount fracture and resulting worst-case stresses "...
Forum: Rotorheads
23rd Nov 2009, 18:50
Replies: 1,141
Views: 303,470
Posted By madrock

DCVC Glad to hear it, because waiting for...

DCVC
Glad to hear it, because waiting for regulators is pointless.

VL


Well I guess then 20 years ago they thought it was technically feasible but very little has happened since. And if...
Forum: Rotorheads
23rd Nov 2009, 02:52
Replies: 1,141
Views: 303,470
Posted By madrock

Couldn't the oil companies take on the leadership...

Couldn't the oil companies take on the leadership role here ? They're the biggest, richest, most powerfull lobby group on the planet - since when if they really want something do they sit back and...
Forum: Rotorheads
18th Nov 2009, 20:14
Replies: 1,141
Views: 303,470
Posted By madrock

JimL : Extremely remote events are not...

JimL :

Extremely remote events are not expected to occur during the total operational life of a random single rotorcraft of a particular type,but may occur a few times during the total...
Forum: Rotorheads
18th Nov 2009, 03:28
Replies: 1,141
Views: 303,470
Posted By madrock

I think by now we can all understand that the...

I think by now we can all understand that the "extremely remote" issue cannot be definitively cleared up either way, as there is no wording regarding context in the regulation,e.g. remote when...
Forum: Rotorheads
8th Nov 2009, 16:46
Replies: 1,141
Views: 303,470
Posted By madrock

frequency-occurance-consequence

The first cracks in the MRGB mounting feet were noticed 10 months ago. Since then, it has happened not once, or twice, or six times, it's happened a lot. Tight inspection and replacement schedule of...
Forum: Rotorheads
26th Oct 2009, 03:38
Replies: 1,998
Views: 558,645
Posted By madrock

Another factor is the time interval between...

Another factor is the time interval between identifying a problem and fixing it.

If you recieve a notice from the manufacturer of your car that a possible mechanical malfunction had been...
Forum: Rotorheads
14th Jul 2009, 02:12
Replies: 1,141
Views: 303,470
Posted By madrock

To be fair I think the TSB is focusing on the...

To be fair I think the TSB is focusing on the right things, according to the items being reviewed/investigated (from the last TSB report) :

The reason the recorder stopped remains under...
Forum: Tech Log
28th Jun 2009, 12:41
Replies: 4,594
Views: 2,850,771
Posted By madrock

Unfortunately based on several recent posts this...

Unfortunately based on several recent posts this seems in many ways to reflect the state of the industry. When many of the people who are in positions to know the difference (pilots, engineers,...
Showing results 1 to 25 of 57
 


 
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