14 C.F.R. § 194.402
The following maintenance provisions under part 43 of this chapter that pertain to rotorcraft also apply to powered-lift:
(b) In lieu of complying with § 43.15(b) of this chapter, each person performing an inspection required by part 91 of this chapter on a powered-lift shall inspect critical parts in accordance with the maintenance manual or Instruction for Continuous Airworthiness, or as otherwise approved by the Administrator.