A-95-082
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FAA: CONDUCT A VIBRATION & LOADS SURVEY & ANALYSIS OF THE PROPELLER INSTALLATION ON THE EMBRAER EMB-120 AIRPLANES WITH APPLICABLE HAMILTON STANDARD PROPELLERS THROUGHOUT THE GROUND & FLIGHT OPERATING RANGE OF THE ENGINE WITH SPECIFIC CONSIDERATION FOR THE EFFECTS OF PROPELLER IN-SERVICE WEAR, MAINTENANCE, OR OTHER CHANGES MAY HAVE ON THE RESONANT FREQUENCIES. BASED ON THE FINDINGS, BROADEN THE SURVEY & ANALYSIS TO OTHER INSTALLATIONS AS APPROPRIATE.
In plain language (FlightFinder summary)
The FAA is asked to conduct a vibration and loads survey and analysis of the propeller installation on Embraer EMB-120 airplanes with applicable Hamilton Standard propellers, covering the entire ground and flight operating range of the engine. The survey must specifically consider how propeller in-service wear, maintenance, or other changes may affect resonant frequencies. Based on the findings, the FAA should broaden the survey and analysis to other installations as appropriate.
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 | Aug 11, 1997 |
| NTSB number | DCA95MA054 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).