A-05-034
NTSB Safety Recommendation — Aviation
Recommendation text
TO THE FEDERAL AVIATION ADMINISTRATION: Require Sikorsky S-76 helicopter operators to: 1) conduct immediate visual and laboratory examinations of hydraulic fluid and filter elements in hydraulic systems with actuators with more than 500 hours since new and/or overhaul for plasma flakes or other contamination that exceeds the manufacturers’ allowable limits of concentration and size; 2) conduct subsequent recurring tests at a period not to exceed 500 hours; 3) report findings of contamination and flakes to the Federal Aviation Administration and/or Sikorsky and 4) correct any problems as necessary. (Urgent)
In plain language (FlightFinder summary)
The Federal Aviation Administration must require operators of Sikorsky S-76 helicopters to inspect hydraulic fluid and filters for contamination like plasma flakes in systems with actuators having over 500 hours since new or overhaul, with follow-up tests every 500 hours. Operators must report any contamination to the FAA or Sikorsky and fix any resulting problems.
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 Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | May 25, 2011 |
| NTSB number | DCA05RA089 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).