Airworthiness Directive · Amendment 39-19669 · Main rotor head
Airbus Helicopters Deutschland GmbH Helicopters
This AD applies to Airbus Helicopters Deutschland GmbH Model MBB-BK 117 C-2 helicopters with a part listed in Table 1 to paragraph (e) of this AD installed, certificated in any category.
Note 1 to paragraph (a) of this AD: Helicopters with an MBB-BK117 C-2e designation are Model MBB-BK117 C-2 helicopters.
We are adopting a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK 117 C-2 helicopters. This AD requires establishing or reducing the life limit of various parts. This AD was prompted by recalculations. 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.
Before further flight, remove from service any part that has reached or exceeded its new or reduced life limit as listed in Table 1 to paragraph (e) of this AD. Thereafter, remove from service each part on or before reaching its new or reduced life limit as listed in Table 1 to paragraph (e) of this AD. For purposes of this AD, a “landing” is counted any time the helicopter lifts off into the air and then lands again regardless of the duration of the landing and regardless of whether the engine is shut down.
| Part name | Part No. (P/N) | Life limit |
|---|---|---|
| Nut | B622M1003201 | 65,800 landings or 10,123 hours time-in-service (TIS) if the number of landings is unknown. |
| Quadruple nut upper Quadruple nut lower | B622M1004201 B622M1005201 | 60,000 landings or 9,230 hours TIS if the number of landings is unknown. |
| Bolt | B622M1006201, B622M1007201 | 31,200 landings or 4,800 hours TIS if the number of landings is unknown. |
| Inner sleeve | B622M1009201 | 13,300 hours TIS. |
| Control ring assembly | B623M2001101 | 27,600 hours TIS. |
| Bellcrank-K (collective) | B670M7021201 | 21,500 hours TIS. |
| Control rod tube | B291M1015201 | 30,000 hours TIS. |
| Forked lever | B671M7007201 B671M7007205 | 22,500 Hours TIS. |
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.
