Incident Overview

Date: Thursday 8 January 1959
Aircraft Type: Douglas DC-3A-197B
Owner/operator: Southeast Airlines
Registration Number: N18941
Location: Mt. Holston, TN – ÿ United States of America
Phase of Flight: Approach
Status: Destroyed, written off
Casualties: Fatalities: 10 / Occupants: 10
Component Affected: Radio CompassRadio Compass
Investigating Agency: CABCAB
Category: Accident
A DC-3 aircraft, departing Nashville for Knoxville and Tri-City, experienced a serious accident due to a radio compass malfunction. The flight initially proceeded without significant issues, but a 27-minute delay at Knoxville caused a further delay. Approaching Tri-City, the crew was cleared for an instrument runway 27 approach. Weather conditions included 900 feet broken ceiling, 1700 feet overcast, visibility 3 miles, light snow, and fog. The crew reported being unable to visually identify the Outer Marker and aural signals, likely due to ADF problems. The aircraft then deviated from its normal turn area and descended below surrounding terrain, resulting in a crash on the northwest side of the Holston mountain range. The probable cause was identified as the pilot’s failure to correctly identify the Gray intersection and subsequent decision to continue an ILS approach, violating company and regulatory procedures.A DC-3 aircraft, departing Nashville for Knoxville and Tri-City, experienced a serious accident due to a radio compass malfunction. The flight initially proceeded without significant issues, but a 27-minute delay at Knoxville caused a further delay. Approaching Tri-City, the crew was cleared for an instrument runway 27 approach. Weather conditions included 900 feet broken ceiling, 1700 feet overcast, visibility 3 miles, light snow, and fog. The crew reported being unable to visually identify the Outer Marker and aural signals, likely due to ADF problems. The aircraft then deviated from its normal turn area and descended below surrounding terrain, resulting in a crash on the northwest side of the Holston mountain range. The probable cause was identified as the pilot’s failure to correctly identify the Gray intersection and subsequent decision to continue an ILS approach, violating company and regulatory procedures.

Description

The DC-3 departed Nashville for a flight to Knoxville and Tri-City with an inoperative radio compass. This defect was not entered in the aircraft log. The first leg of the flight was uneventful, apart from a 27 minute delay in the departure from Knoxville. Approaching Tri-City, the flight crew were cleared for an instrument runway 27 approach. Weather reported was 900 feet broken ceiling, 1700 feet overcast, visibility 3 miles, light snow, fog. The flight crew later reported not being able to pick up the Outer Marker visually, nor aurally due to problems with the ADF. The aircraft had passed east of the Outer Marker, turning beyond the normal procedure turn area and descending below surrounding terrain. The aircraft crashed on the northwest side of the rugged and heavily wooded Holston mountain range. PROBABLE CAUSE: “The Board determines the probable cause of this accident was the failure of the pilot to identify Gray intersection properly and his decision to continue an ILS approach contrary to company and regulatory procedures.”

Primary Cause

Failure to correctly identify the Gray intersection and subsequent ILS approach.Failure to correctly identify the Gray intersection and subsequent ILS approach.

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