During the annual inspection of our RV-4, we discovered cracks in the brackets where the upper engine mounts attach to (the aft side of) the firewall. The aircraft was built in the late 1980s and has around 1360 total hours with an O-320 150 hp engine and a fixed pitch prop.
The picture is from the right side, on the left side smaller cracks were also beginning to form.
I have e-mailed Van's for recommendations. When searching this forum most threads seem to be about cracking related to the lower engine mounts and gear mounts, but this thread from 2005 appears to discuss the same problem: http://www.vansairforce.com/community/showthread.php?t=3663
Does anyone have experience with this issue? Suggestions would be welcome.
Regards,
Trond M.
The picture is from the right side, on the left side smaller cracks were also beginning to form.
I have e-mailed Van's for recommendations. When searching this forum most threads seem to be about cracking related to the lower engine mounts and gear mounts, but this thread from 2005 appears to discuss the same problem: http://www.vansairforce.com/community/showthread.php?t=3663
Does anyone have experience with this issue? Suggestions would be welcome.
Regards,
Trond M.