>> The gross weight increase STC does not require the stainless steel.
The stainless steel skin is required on the model D and later because of differences between the regulations under which the C and CD are certified (CAR 4a Aircraft Specification A-718) and the D and later models were certified under (CAR 3 Type Certificate Data Sheet A-787). Since 415-C's under the STC remain C's the stainless steel skin is not required. (CD's already have it). John Cooper Skyport Services www.skyportservices.net
