An Example Repair
From Bondline
This page details an example of a Major Repair. Degree of difficulty xxxx. As with all Major Repairs, a Form 337 is required, and in this case an FAA Designated Engineering Representative (DER) was involved in the structural analysis.
The damage to the lower side of a Cheetah horizontal stabilizer that had an unfortunate encounter with a runway light.
The repair is major since the required patch is over 6 inches in one direction, and the spar cap is damaged, which is defined as a primary structure in the Maintenace Manual.
