A-03-021
NTSB Safety Recommendation — Aviation
Recommendation text
The National Transportation Safety Board recommends that the Federal Aviation Administration: Require, on an expedited basis, that the on-aircraft test procedure developed by Rolls-Royce to identify faulty potentiometers be performed, on a repetitive basis at a conservative interval, on all Bell 407, MD-600, and OH-58 helicopters to determine if the potentiometer contained in the hydromechanical unit (HMU) is working properly. HMUs with faulty potentiometers should be replaced.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to require, on an expedited basis, a repetitive test procedure developed by Rolls-Royce on Bell 407, MD-600, and OH-58 helicopters to identify faulty potentiometers in the hydromechanical unit (HMU). HMUs with faulty potentiometers must be replaced.
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 | Apr 15, 2004 |
| 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).