Having had a longish (5-6 weeks) layoff with loads of work and lots of bad weather .. I was actually in Jersey AND it was CAVOK ! and calm !
Duly pulled the ‘plane out and got the engine warmed up with a plan to of the powered climb test for the LAA sign off …
As we got up to temps .. All looked well and taxied up to the far end of the runway 08
Just after lift off the oil temp started to climb rapidly … This problem HAD been fixed by opening up the intake and exit holes and had flown a number of times since … What could be wrong ?
Changed my plan for a large clearing circuit to a close bad weather and then elected for a very tight right hander … The training at Little Snoring really came into its own as we turned a nice tight very short base and back for a soft landing …
The tower had already pressed the alarm button and I had talked to them on the tight right downwind to inform them that it was oil temps rising and couldn’t maintain height.
The full crash tender and blues followed me all the way back to the taxiway and parking at the club after I had run some more engine bursts on the grass to see if it was still ,is behaving in the ground .. Which it was …
Suspect a blocked or seized TOCA oil thermostat valve and chatting with PHS from TLAC suspects the same … Will remove it at the weekend and see if I can test it offline before another ground pre test.
(sent an email to the Jersey SATCO as I think it’s important that they are thanked for their calm support – and fire crew – but also know that I will do something about it before we try again 😉
Removed and stripped down the TOCA which is a simple piece if equipment with a bi metallic type unit that, on heating operates an plunger which presses against the small cover plate and pushes the copper looking barrel down the shaft (against the spring) and this then effectively opens up the flow of oil through the now open hole – the hole aligning with the oil feed hole in the engine block.
Unit out and placed in a pan of boiling water and sure enough .. The plunger pushed out about 1.5cm
Decided I will try it without this spring and plunger unit in … Simple enough test to fully eliminate it as a problem on extended ground runs BEFORE I try to fly her again.