A-86-053
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE TO REQUIRE (1) INSTALLATION OF FAIL-SAFE COMPONENTS WITHIN THE TAIL ROTOR DRIVE SHAFT FLEXIBLE COUPLINGS (P/N 369A92564 AND P/N 369H92564) ON APPLICABLE MCDONNELL DOUGLAS MODEL 369 HELICOPTERS WITHIN A REASONABLE TIME PERIOD, (2) THAT HELICOPTERS WITH THE FAIL-SAFE SYSTEM BE CHECKED BEFORE EACH FLIGHT TO VERIFY THAT THE TAIL ROTOR DRIVE SHAFT COUPLINGS ARE INTACT AND NOT DAMAGED, AND (3) THAT ANY BROKEN OR DAMAGED COUPLINGS DISCOVERED DURING THE PREFLIGHT INSPECTION BE REMOVED FROM SERVICE.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to issue an airworthiness directive requiring three actions for certain McDonnell Douglas Model 369 helicopters: installation of fail-safe components in tail rotor drive shaft flexible couplings (part numbers 369A92564 and 369H92564), preflight checks to ensure the couplings are intact and undamaged, and removal of any broken or damaged couplings discovered during inspection.
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, 1986 |
| NTSB number | MIA86MA182 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).