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							| PMA Part # (Replacement For OEM PN)
 | Approval Means Description
 | PMA Holder |   
							| Model Eligibility |   
  | Seal, Serrated, Balance Piston (23030978-1)
 
 | Details Available E23030978-1
 | Details Available |   
  | Allison Engine (250-B17, B17B, B17C, B17D, C20, C20B, C20C, C20F, C20J, C20S, C30, C30M, C30P, C30S, C30G, C30G/2) |   
  | Seal, Serrated Balance Piston (Allison 23030978-1)
 
 | Details Available 23030978AL-1
 | Details Available |   
  | Allison Engine (250-B17, -B17B, -B17C, -B17D, -C20, -C20B, -C20C, -C20F, -C20J, -C20R/1, -C20R/2, -C20S, -C28B, -C28C, -C30, -C30G, -C30L, -C30M, -C30P, -C30R, -C30S, -C30G/2, T63-A-720) |   
  | Seal, Serrated Balance Piston (Allison 23030978-1, -2)
 
 | Details Available 23030978AL-1, -2
 | Details Available |   
  | Allison (Allison Engine Model(s) 250-B17, -B17B, -B17C, -B17D, -C20, -C20B, -C20C, -C20F, -C20J, -C20R/1, -C20R/2, -C20S, -C28B, -C28C, -C30, -C30G, -C30L, -C30M, -C30P, -C30R, -C30S, -C30G/2, T63-A-720) |   
  | Seal, Serrated, Balance Piston (23030978-1,-2)
 
 | Details Available E23030978-1,-2
 | Details Available |   
  | Rolls-Royce (250-B17, B17B, B17C, B17D, C20, C20B, C20C, C20F, C20J, C20S, C30, C30M, C30P, C30S, C30G, C30G/2) |   
  | Seal, Serrated, Balance Piston (23030978-1,-2)
 
 | Details Available E23030978-1,-2
 | Details Available |   
  | Allison (250-B17, B17B, B17C, B17D, C20, C20B, C20C, C20F, C20J, C20S, C30, C30M, C30P, C30S, C30G, C30G/2) |   
  | Seal, Serrated, Balance Piston (23030978-1)
 
 | Details Available E23030978-1
 | Details Available |   
  | Allison (250-B17, B17B, B17C, B17D, C20, C20B, C20C, C20F, C20J, C20S, C30, C30M, C30P, C30S, C30G, C30G/2) |  |  |  |