A-08-027
NTSB Safety Recommendation — Aviation
Recommendation text
TO THE FEDERAL AVIATION ADMINISTRATION: Require that all Robinson Helicopter Corporation main rotor blades be inspected using the effective and reliable nondestructive inspection method(s) developed in response to Safety Recommendation A-08-26 at intervals appropriately less than 596 hours time in service (TIS), which investigations have shown to be the earliest known TIS at which debonding occurs, to evaluate the bond joints between the skin and spar at the tip of the main rotor blade and between the skin and tip cap to find bonding defects.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to mandate inspections of all Robinson Helicopter Corporation main rotor blades using reliable nondestructive inspection methods developed in response to a prior recommendation (A-08-26). The inspections must occur at intervals shorter than 596 hours time in service, because investigations have identified that as the earliest point at which debonding has been observed in the bond joints between the skin and spar at the blade tip, and between the skin and tip cap.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Unacceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Nov 20, 2012 |
| NTSB number | DFW07WA002 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).