Replacement of the BHTI Vertical Fin Web/Spar with the New BELL 412 Helicopter Vertical Fin Web/Spar Assembly is considered by the Federal Aviation Administration (FAA) a major repair and therefore requires “competent and experienced” personnel. SWFA holds Federal Aviation Administration (FAA) approval under its Repair Station Certificate for the replacement of the fin spar/web on the following aircraft: UH-1B, UH-1H, UH-1L, UH-1F, UH-1P, 204B, 205A-1, 212, and 412. This modification is a Federal Aviation Administration (FAA) - Means of Compliance (MOC) approved terminating action for the spar Airworthiness Directive (AD 99-25-12, AD 93-02-07).