Originally Posted by
Colibri49
n305fa
Thanks for the clarification of what caused REDL's gearbox to fail. That accident didn't just happen with no prior indication. Metal particles from the epicyclics were detected in the period of flying hours and/or days before it happened.
Hence my question "Was there any history of the Norwegian EC225 gearbox making metal before the crash, because if not the likelihood of similarity with REDL is probably reduced?"
Colibri49
I don't disagree.
There were issues with the actions taken after the chip was found on REDL but no further chips were detected in the week of operation prior to the accident. We will never know if REDLs MGB would have been declared US if the full checks had been carried out but reading the report the lack of further chip detections before the last flight was unusual. The monitoring systems are designed to detect progressive not rapid failure modes so there may have been no indication that the 225's MGB was in distress.