A-03-019
NTSB Safety Recommendation — Aviation
Recommendation text
The National Transportation Safety Board recommends that the Federal Aviation Administration: Require the manufacturer of the full authority digital electronic control system installed on helicopters equipped with Rolls-Royce Model 250 series IV engines to modify the system such that an erroneous or erratic in-range potentiometer throttle position angle signal will not cause an uncommanded increase or decrease in fuel flow, which could result in a drastic reduction in engine power.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to require the manufacturer of the full authority digital electronic control system on helicopters equipped with Rolls-Royce Model 250 series IV engines to modify the system. The modification must prevent an erroneous or erratic in-range potentiometer throttle position angle signal from causing an uncommanded increase or decrease in fuel flow. Such a signal could lead to a drastic reduction in engine power.
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 | Feb 7, 2005 |
| NTSB number | FTW03FA118 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).