F35 B Bulkhead Cracks
I recall that a number of cracks have in the past been found on F35B bulkheads. These cracks appeared in ground-based testing at beyond the first 8,000 hours of use.
It was stated that all F35Bs would have to be strengthened and an improved design for bulkhead 496 would have to be developed.
Does anyone know if these/this new bulkhead(s) have been engineered and how much did this add to the weight?