Beechcraft C90 N66KA

Summary

On 29 March 1984 at about 01:30 local time, a Beechcraft C90 registered N66KA was involved in an incident near Herndon, Virginia, United States. 2 people were on board and nobody was injured. The aircraft was slightly damaged. No probable cause statement is available for this record.

Date

29 March 1984 at 01:30

Classification

Incident

Location

Herndon, Virginia, United States

Coordinates

Not recorded

Aircraft

Beechcraft C90

Registration

N66KA

Category

Airplane

Engines

2

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Roanoke → Unknown

Aircraft damage

Minor

Weather

IMC

Light

Night/Dark

NTSB number

ATL84IA134

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

THE ACFT ENTERED AN UNCOMMANDED DIVE AT ABOUT 11,000 FT MSL, WITH RECOVERY MADE BELOW 2,000 FT MSL. INVESTIGATION REVEALED THAT DURING THE DESCENT, IN ORDER TO ACCOMODATE OTHER AIR TRAFFIC, THE PLT EXCEEDED VNE SPEEDS. SHORTLY, THEREAFTER THE ELEVATOR TRIM SYSTEM MALFUNCTIONED & JAMMED THE TRIM IN THE FULL NOSE DOWN TRIM POSITION. WHEN A BRIEF FLARE-UP OF SMOKE & SPARKS ERUPTED UNDER THE RT INSTRUMENT PANEL ON THE LT SIDE OF THE CONTROL COLUMN THE PLT DELAYED AN EMERGENCY BUT DID NOT RELAY INFORMATION CONCERNING THE CONTROL PROBLEM. POST INCIDENT EXAMINATION FOUND THE ELEVATOR TRIM TAB CABLE BROKEN AT THE TRIM SERVO, LOCATED UNDER THE AFT CABIN FLOOR JUST FORWARD OF THE CABIN ENTRANCE DOOR. FRAYED IN AN IRREGULAR MANNER OVER A NINE INCH AREA, THE LOOSE CABLES BECAME ENTANGLED IN THE ELECTRICAL POWER DIODES LOCATED BENEATH THE CONTROL PEDESTAL. INSPECTION REVEALED THE FRICTION CLUTCH OPERATED AT TOO HIGH TORQUE & THE CABLES WERE OUT OF ALIGNMENT CAUSING HEAT TO OTHER COMPONENTS.

Quoted verbatim from the NTSB record.