Airworthiness Directive · Amendment 39-21247 · Main rotor mast/swashplate
Bell Helicopter Textron Canada Limited Helicopters
This AD applies to Bell Helicopter Textron Canada Limited Model 505 helicopters, certificated in any category, with a serial number (S/N) 65011 through 65211 inclusive, and swashplate assembly part number (P/N) 206-010-450-123 with an S/N listed in Table 1 of Bell Alert Service Bulletin 505-19-13, dated July 2, 2019, installed.
The FAA is adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited (Bell) Model 505 helicopters. This AD requires inspecting each swashplate assembly bearing (bearing), and depending on the inspection results, removing the bearing from service. This AD was prompted by a report of a bearing that migrated out of the swashplate inner ring. The actions of this AD are intended to address an unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Within 20 hours time-in-service, inspect both sides of each swashplate assembly bearing (bearing) for staking by following the Accomplishment Instructions, paragraph 4., of Bell Alert Service Bulletin 505-19-13, dated July 2, 2019, except you may use a 10X or higher power magnifying glass. If either side of a bearing is not staked, before further flight, remove the bearing from service.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
