PPRuNe Forums - Bristow emergency landing

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Quote:

Originally Posted by [email protected] (Post 10914823)

so they have just reinvented the ELS system from the Sea King except using a fuel pump instead of the Tqmeter pump. - not exactly a 21st century solution.

Remind me how long it took Wastelands to develop a system for the Sea King that was already in use on the S61?...and had been from the mid 70's.
I am not standing up for Sikorsky on this, this problem should have been sorted out years ago.
Phil Kemp, you beat me to it.
3D CAM

Yes Wastelands were doing what they do best - waiting to see how much they could charge the customer for providing something that should have been there in the first place.

Either way, the S-92 'fix' isn't new technology and adds extra pipes and complexity that they claimed was what they had eliminated with the original design of the MRGB.

Quote:

Originally Posted by HeliMannUK (Post 10917178)

I dont think the accessories can last that long without oil but still flying on the APU & backup hyd is better than not flying. Maybe the supplemental supplies oil to the accessories?

I think if you reached the stage where the AC Gens and 1/2 hydraulic pumps have mechanically failed due to lack of lubrication, you have really stretched your luck!

I can say, though, that during prolonged churning the AC Gens will trip offline due to overheating (being normally cooled by the MGB oil). We lost No 1 and I don’t know how long No 2 would have stayed online. This then revealed a stuck AC bus relay, so No 1 AC bus dropped offline and took the No 1 and Backup DC Converters with it.