WHILE EN ROUTE IN IMC, THE ATC CONTROLLER NOTED THAT THE ACFT BEGAN TO REVERSE COURSE & ASKED THE PLT IF HE WAS HAVING A PROBLEM. THE PLT RESPONDED THAT THE ACFT WAS IN CLOUDS, HE WAS HAVING PROBLEM WITH HIS ARTIFICIAL HORIZON & THAT HE DIDN'T REALIZE HE WAS IN A TURN. SUBSEQUENTLY, HE REPORTED FAILURES OF THE ARTIFICIAL HORIZON & AUTOPILOT, AND SAID HE WAS USING NEEDLE, BALL & AIRSPEED. THE CONTROLLER PROVIDED GYRO OUT PROCEDURES, BUT THE PLT WAS UNABLE TO MAINTAIN AN ALTITUDE & HEADING. ALSO, WX THRU-OUT THE AREA CONSISTED OF LOW CEILINGS & CLOUDS TO ABOVE 18,000 FT. THE PLT WAS ADVISED THE BEST WX AROUND WAS AT CHATTANOOGA, TN, WHICH HAD 1300 SCATTERED, 2000 FT OVERCAST, VISIBILITY 3 MI WITH LIGHT RAIN & FOG. SHORTLY AFTER THAT, RADIO & RADAR CONTACT WERE LOST. PARTS OF THE ACFT WAS FOUND IN THE COMBHEE RIVER. THE RIGHT WING WAS FOUND ABOUT 1000 FT FROM THE RIVER. THE VACUUM PUMP, ENG, TURN & BANK INDICATOR AND SEVERAL OTHER ITEMS WERE RECOVERED FROM THE RIVER, BUT NO MALFUNCTION OR FAILURE OF THESE WAS FOUND.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

Contributing Factors

WEATHER CONDITION..CLOUDS

Contributing Factors

WEATHER CONDITION..LOW CEILING

Contributing Factors

FLIGHT/NAV INSTRUMENTS,ATTITUDE INDICATOR..INOPERATIVE

Contributing Factors

AUTOPILOT/FLIGHT DIRECTOR..INOPERATIVE

Contributing Factors

WEATHER CONDITION..FOG

Contributing Factors

WEATHER CONDITION..RAIN

Index for Jan1983 | Index of months