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CGS HAWK
The following service
bulletin is one the manufacturer issued several years ago. It is being repeated here because of the manufacturer's concern that they were not widely publicized at the time and that many Hawk owners, especially those who have re-purchased used craft may not be aware of these problems that need to be addressed.
Issued by MANUFACTURER
Service bulletin 4-20-89B dated: April 20, 1989
MODELS AFFECTED: All CGS Hawk Aircraft
SUBJECT: Control Cable Erosion
SUMMARY: During flight at approximately 20 altitude and a speed of 60-80 mph, the up elevator cable broke resulting in an immediate slip to the ground, striking a wing and then flipping the plane on its back. Inspection showed the location where the cable broke had been reduced in cross section by approximately 65%.
Only 2 strands out of7 were intact. The area of erosion was where the cable and nylon housing exit the main tube near the tail. Further inspection showed that the rudder cables had 2 frayed strands. The aileron cables showed no signs of wear.
REQUIRED ACTION: Inspect the rudder and elevator cables where they exit the boom tube. You can loosen the clamps and slide the nylon housing forward to examine the cables. It may be necessary to trim
off some of the housing. If you see any wear on your cables, replace them and please send the worn portion of your old cable to CGS along with the amount of time in service, and whether the cable is for the up or down elevator, or right or left rudder.
In any event, if any black powder can be seen through the housing, or if you have 500 hours time on your Hawk, replace the cables. |
