SWFA performs replacement of the fin spar in the following aircraft: SW Series, UH-1H, UH-1B, UH-1L, UH-1F, UH-1P and the Bell 204B, 205A-1, and 212. This modification is a Federal Aviation Administration (FAA) and a US Army Air Worthiness Release (AWR) approved terminating action for the spar FAA Airworthiness Directive (AD 99-25-12) and subsequent US Army Safety of Flight (SOF) compliance.

• Item 1 Replacement spar: this spar uses the Bell 412 spar  cap
• Item 2 Replacement bulkhead: canted bulkhead (2 parts)  was 0.015 to 0.025 thick each and is replaced by 0.032  thick bulkheads
• Item 3 Replacement shear tie: this replaces the previous  shear tie that was 0.063 thick and is now 0.080 thick
• Item 4 Replacement skin: this replaces the previous skin  that was 0.025 thick, and is now 0.032 thick
• Item 5 Replacement doublers: the left side is 0.032 thick  and the right side is 0.040 thick, these doublers replace the  previous 0.025 thick doublers
• Item 6 Skin: replaces the existing skin with skin and clips  similar to Bell 212/412
• Item 7 Replaces the existing doublers with doublers similar  to Bell 212/412Item 8 Replacement stringers: these stringers replace the  previous 0.025 thick stringer (now 0.032 thick)
• Item 9 Added doubler (left side only): this additional doubler  has been added to the left side only and is 0.040 thick
• Item 10 Added doubler: This doubler is 0.025 thick