A-96-006
NTSB Safety Recommendation — Aviation
Recommendation text
TO THE FEDERAL AVIATION ADMINISTRATION: Issue an Airworthiness Directive for McDonnell Douglas helicopter models 369D, 369E, 369H, OH-6A (military version of the 369A), and 500N to require inspection of the root end of the main rotor blades for cracking and bond separation of the lower root fitting according to McDonnell Douglas service info notice DN-188, EN-81, FN-67 HN-239, and NN-008, dated 10/27/95. In addition, the Airworthiness Directive should include inspection for bond separation between the upper root fitting and the doubler, as well as for cracking in this area. (Urgent)
In plain language (FlightFinder summary)
The NTSB urged the FAA to mandate immediate inspections of specific McDonnell Douglas helicopter models for structural damage in their main rotor blades. This directive targets potential cracks and separation of the metal fittings at both the top and bottom ends of the blade roots. The goal is to prevent failures that could compromise flight safety by ensuring these critical components are checked according to manufacturer guidelines.
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 - Acceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Dec 3, 1996 |
| NTSB number | DCA95WA063 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).