A-84-086
NTSB Safety Recommendation — Aviation
Recommendation text
SINCE COMPLETE ELECTRICAL POWER FAILURE DURING FLIGHT IN INSTRUMENT METEOROLOGICAL CONDITIONS PRESENTS A HAZARD TO SAFE FLIGHT, AND SINCE THESE ALTERNATORS ARE USED ON VARIOUS MAKES AND MODEL TWIN ENGINE AIRPLANES, INCLUDING AIRPLANES USED IN COMMUTER AND AIR TAXI OPERATIONS, THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: IDENTIFY THE MAKES AND MODELS OF TWIN-ENGINE AIRPLANES EQUIPPED WITH PRESTOLITE 100-AMPERE ALTERNATORS AND EVALUATE THEM FOR SUSCEPTIBILITY OF THE ALTERNATORS TO ICE FORMATION IN THE BRUSHHOLDERS THAT CAN CAUSE INTERRUPTION OF ELECTRICAL POWER GENERATION, AND TAKE THE ACTION NECESSARY TO CORRECT ANY DEFICIENCIES THAT CAUSE SUCH ICE FORMATION.
In plain language (FlightFinder summary)
The NTSB asks the Federal Aviation Administration to identify twin-engine airplane models equipped with Prestolite 100-ampere alternators, evaluate those alternators for susceptibility to ice formation in the brushholders that could interrupt electrical power generation, and take corrective action for any deficiencies found. This is prompted by the hazard of complete electrical power loss during flight in instrument meteorological conditions, which threatens safety.
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 | Jan 14, 1986 |
| NTSB number | ATL83LA077 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).