G109 grounded
Joined: Feb 2005
Posts: 128
Likes: 0
From: Cardiff
May be something to do with this
"Following a recent engine failure, the BGA strongly recommends that whenever the valve clearances are checked or adjusted on the Grob G2500 engine, the engine is turned to fully open the valve and a check carried out to ensure there is clearance between the rocker arm and the valve roto cap. If you are affected, please pass this instruction on to your maintenance engineer."
That's all I know.
Cheers
"Following a recent engine failure, the BGA strongly recommends that whenever the valve clearances are checked or adjusted on the Grob G2500 engine, the engine is turned to fully open the valve and a check carried out to ensure there is clearance between the rocker arm and the valve roto cap. If you are affected, please pass this instruction on to your maintenance engineer."
That's all I know.
Cheers
Joined: Jan 2012
Posts: 395
Likes: 18
From: anywhere
Joined: May 2005
Posts: 421
Likes: 0
From: UK
AIUI, it requires a modification to the vertical stabiliser to allow access for the inspection.
The guy who knows is Tim Dews of Airborne Composites in the UK; I believe he identified the original problem.
Edit - I was wrong; the access mod for inspection is for a different issue. Sorry if I misled anybody.
The guy who knows is Tim Dews of Airborne Composites in the UK; I believe he identified the original problem.
Edit - I was wrong; the access mod for inspection is for a different issue. Sorry if I misled anybody.
Last edited by DaveW; 2nd November 2012 at 21:38.
Joined: Jul 2007
Posts: 242
Likes: 0
From: London
DG800 - The RAF can't take any risks as they are flying someone's kid in the Grobs and after the summer a couple of years back they are over safe with good cause.
Can you imagine the uproar if one did go in and the fleet hadn't been grounded? The fleet are dispursed around the country and it takes time to get the manpower in the correct place.
May be an over reaction but better that than learn from hindsight.
OB
Can you imagine the uproar if one did go in and the fleet hadn't been grounded? The fleet are dispursed around the country and it takes time to get the manpower in the correct place.
May be an over reaction but better that than learn from hindsight.
OB
Joined: Nov 2005
Aviation Qualifications: PPL
Posts: 12,458
Likes: 368
From: Wildest Surrey
It already happened before in about '91. The entire fleet was first grounded, (after a very nasty incident at Binbrook) then the restriction was partially lifted to allow cadets to go solo - with an instructor along 'just in case'!! It was called a 'ghost solo'.
I think it was caused by the use of MOGAS, combined with long periods of carb heat causing vaporistion in the fuel lines, but maybe someone else can elucidate.
(NB It does strike me as strange that a powered glider losing its engine can be considered dangerous)
I think it was caused by the use of MOGAS, combined with long periods of carb heat causing vaporistion in the fuel lines, but maybe someone else can elucidate.
(NB It does strike me as strange that a powered glider losing its engine can be considered dangerous)
