- Reaction score
- 393
- Points
- 880
I don't know where you got your information from Scoobs - but your facts on the -149 are way out to lunch.
The Cormorant's tail rotor half hub (TRHH) have been a cause for concern since the downing of a RAF Merlin and our discovery of significant micro-fissures near the cut-outs on the TRHH. Last year the fleet was restricted to 2 hours of flight time before a visual inspection was mandated to be made of the TRHH. This could be done by the FE on the road. Just recently the CAD has allowed that visual inspection cycle to be every 3 hours.
Every 50 hours the entire tail rotor assembly must be torn down, inspected and then returned to service. The IMP crews usually take care of this on the night shift and it is usually a non-event. If there are no cracks or wear discovered (which there hasn't been for quite a while now) the TRHH is returned to service - not replaced.
Believe it or not - DFS has offically ruled that the -149 did not suffer any mechanical problems, environmental and human factors are now being investigated.
The Cormorant's tail rotor half hub (TRHH) have been a cause for concern since the downing of a RAF Merlin and our discovery of significant micro-fissures near the cut-outs on the TRHH. Last year the fleet was restricted to 2 hours of flight time before a visual inspection was mandated to be made of the TRHH. This could be done by the FE on the road. Just recently the CAD has allowed that visual inspection cycle to be every 3 hours.
Every 50 hours the entire tail rotor assembly must be torn down, inspected and then returned to service. The IMP crews usually take care of this on the night shift and it is usually a non-event. If there are no cracks or wear discovered (which there hasn't been for quite a while now) the TRHH is returned to service - not replaced.
Believe it or not - DFS has offically ruled that the -149 did not suffer any mechanical problems, environmental and human factors are now being investigated.

