Md helicopter airworthiness directives
1 AD in the reference matching Md helicopter — from the Federal Register, checked every weekday. Applicability may depend on serial and effectivity: verify against the official AD before any maintenance action.
Reference last synced: 10/26/2026 05:00 UTC · 10,463 ADs indexed
AD 2020-11-07Effective 06/30/2020
Airworthiness Directives; MD Helicopter Inc., Helicopters
The FAA is adopting a new airworthiness directive (AD) for MD Helicopters Inc., (MDHI) Model 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by a report of non-conforming main rotor (M/R) hub lead-lag bolts (bolts). This AD requires removing certain bolts from service. The FAA is issuing this AD to address the unsafe condition on these products.