Daihatsu Hi-Jet Pickup Truck Page DOOM

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Today I had a test run up to check out the new aircraft starting battery. At around 60-70% RPM, there was a loud whoop type noise, the engine flamed out and was it at standstill within 10 seconds! The HP Cock was swiftly placed to the off position and I was left with wobbly knees and slightly tearful, also clueless as to what had just happened. After I gathered myself together and had a quick inspection, it became obvious that the engine had been FODDED with a fairly large piece of yellow cloth. Don't know where it came from, but there you go, it was there. The engine was extremely stiff to turn, impossible by hand and at this point I was convinced that the engine was a right off. I quickly took the viper back to the workshop, where an intelligent guess was that the last 4 stages and had effectively centrifuged the material outwards on to the outer compressor blade tips where they acted as friction between the outer tips and the compressor case. I administered a large quantity of WD40 in the hope that this would free it up and also by turning it over on the starter would expel the cloth, a bit of wishfull thinking unfortunately and the starter may have been damaged during this procedure, time will tell. Then after a conversation with Martin Hill of Fireforce fame, it was decided that the only option would be to remove the compressor case and remove the foreign material by hand. Pictured below is what we found.

A sneaky view of inside the compressor case, cloth is already visable on the compressor blades.

The stator blades have virtually no large debris on them, this is a relief, but is also kind of expected, more importantly there is no obvious damage.

You may notice that there is a film of cloth residue, on the stators, this comes off easily.

The scary bit, obvious cloth ingestion as expected on the outer blade tips.
Using tweezers and a vacuum cleaner we carefully removed all vi sable cloth fragments, as you can see the combustion chamber guide vanes have caught a fair quantity of material.
So far there seems to be no damage to the rotor assembly, the top case will be replaced and the lower compressor segment will be removed and checked.

The engine has now been put back together and has had numerous runs including a 60 second 100% run.
There is a noise that is noticeable coming from the engine at about 2-6 seconds before the engines stops once shut down, but this may well have been there before (I Hope), so I am going on the presumption that all is ok.

PHEW for now!!!


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