Dear Bell 206 customers:
On August 29, 2018, the Civil Aviation Administration of China issued the airworthiness instruction CAD2018-B206-01, aiming to increase the RPM (N2) steady-state operation avoidance limit for the affected models.
Aerochine reminded affected customers should executed this airworthiness instruction as soon as possible to avoid affecting the aircraft's airworthiness.
Release date: 2018/8/29
Effective date: 2018/9/5
Engine-turbine/turbine shaft-RPM (N2) steady-state operation avoidance range limitation
Rolls Royce 250-C20 series engine's third-stage turbine impeller has harmful vibrations in a specific turbine speed range, there is a possibility of failure. So, it is required to increase the RPM (N2) steady-state operation avoidance range limit, and install the identification plate in the cockpit.
1. TCCA AD CF-2018-23 (issued on August 22, 2018)
2. BHTCL Alert Service Bulletin (ASB) 206-07-115 D (released on July 9, 2018)
3. BHTCL Alert Service Bulletin (ASB) 206L-07-146 C (released on July 9, 2018)
Bell Helicopter Textron Canada Limited (BHTCL) model 206B series helicopters including those converted from model 206A, serial numbers up to 4690, and model 206L series helicopters, serial numbers 45001 through 45153 and 46601 through 46617.
This AD does not address BHTCL model 206A, 206B, 206L and 206L-4 modified by TCCA Supplemental Type Certificates (STCs) SH95-45, SH95-46, SH01-30 and FAA STCs SH4169NM, SH4179NM and SR00036SE. A separate AD may be issued in the future.
Time limit for completion
July 16, 2018 (according to ASB 206-07-115 D)
Users can make it by themselves
In response to this airworthiness directive, it is required to remind the pilot of the turbine speed avoidance range and attach the corresponding identification plate in the cockpit. These measures need to be implemented as soon as possible to avoid affecting the airworthiness of the aircraft.
About Aerochine Aviation Limited
Aerochine Aviation Limited or Aerochine is headquartered in Hong Kong Special Administrative Region (HKSAR) with offices in Beijing, Shanghai and Shenzhen. With its wholly owned subsidiaries in Ningbo and Zhenjiang, Aerochine put extraordinary effort in providing holistic customer services to clients including aircraft sales & leasing, sales & delivery of spare parts, as well as aircraft maintenance.