Rotax 2-Stroke Engine Shockload Test.
(SLT for Type A or Type B Gearbox).


Contents ...


Visual inspection of gearbox housing ...

NDT Dye Penetrant Crack Test of gearbox housing ...

Measure Propeller Shaft radial run-out ...

NDT Magnetic Particle Crack Test of propshaft ...

NDT Magnetic Particle Crack Test of propshaft gear ...

NDT Magnetic Particle Crack Test of dog gear ...

NDT Magnetic Particle Crack Test of drive gear ...

De-Magnetise any parts subjected to Magnetic Particle Testing ...

Replace both gearbox bearings ...

Reassemble gearbox, measure & reset pre-load ...

Refit gearbox ...

Re-fit propeller ...

Test Run Engine ...

Print Shock Load Test Report ...


Visual inspection of gearbox housing ...

We start by inspecting the gearbox housing for external signs of physical damage.


NDT Dye Penetrant Crack Test of gearbox housing ...

This is a standard three phase Dye Penetrant test using Cleaner, Dye Penetrant and Developer to highlight any cracks in the gearbox housing that may not otherwise be visible.


Measure propeller shaft radial run-out ...

The crankshaft drive gear is removed and gearbox replaced. The propshaft axial run-out is measured and recorded. The run-out should be less than 0.05mm.


NDT Magnetic Particle Crack Test of propshaft ...

The propshaft is subjected to a Magnetic Particle crack test using an AC / Full-Wave DC test yoke and Magnaflux UV(A) ink.


NDT Magnetic Particle Crack Test of propshaft gear ...

The propshaft gear is subjected to a Magnetic Particle crack test using an AC / Full-Wave DC test yoke and Magnaflux UV(A) ink.


NDT Magnetic Particle Crack Test of dog gear ...

The dog gear is subjected to a Magnetic Particle crack test using an AC / Full-Wave DC test yoke and Magnaflux UV(A) ink.


NDT Magnetic Particle Crack Test of drive gear ...

The drive gear is subjected to a Magnetic Particle crack test using an AC / Full-Wave DC test yoke and Magnaflux UV(A) ink.


De-Magnetise any parts subjected to Magnetic Particle Testing ...

Any parts that have been subjected to a Magnetic Particle crack test are de-magnetised with a dminishing AC magnetic field. Succesfull de-magnetisation is checked with a Residual Field Strength Meter. It is very important that ferromagnetic components do not hold a magnetic field when re-assembled otherwise they will attract any swarf that may be present in the oil and cuase premature wear of gearbox components.


Replace both gearbox bearings ...

The two main gearbox bearings are not designed to handle the forces they may be subjected to in the event of a prop strike. As their reliable servicibility cannot be gaurenteed after a prop strike it is advisable to replace them.


Reassemble gearbox, measure & reset pre-load ...

The gearbox is re-assembled using new Half Rings (very important). Gearbox shims are added to realise the correct pre-load.


Refit gearbox etc ...

The gearbox is refitted along with the magneto flywheel and spark plugs etc.


Re-fit prop ...

Propeller is refitted and torqued up.


Test run engine ...

All re-assemby work is checked over, locking devices refitted and the engine test run.


Print Propeller SLT report ...

A full Propeller Shock Load Test Report is provided along with any additional recommendations.

Our Hours:

The mobile is normally answered during the following times ...

Monday - Sunday: 8:30 am - 9:30pm

Please leave a message as we may be unable to answer. We will call you back!

AeroFix Aviation Ltd
Bolton
Lancashire
United Kingdom
BL3 4NN
Telephone: 07779 147 229
E-mail:
Enquiries@AeroFixAviation.co.uk