Bell 206L-3 N99TV

Summary

On 13 September 1984 at about 12:58 local time, a Bell 206L-3 registered N99TV was involved in an accident near Denver, Colorado, United States. 3 people were on board and 2 were seriously injured, one had minor injuries. The aircraft was destroyed. No probable cause statement is available for this record.

Date

13 September 1984 at 12:58

Classification

Accident

Location

Denver, Colorado, United States

Coordinates

39.7298, -105.0197

Aircraft

Bell 206L-3

Registration

N99TV

Category

Helicopter

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Denver → Unknown

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

DEN84FA290

2 people were seriously 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

PLT HAD SLOWED THE HELICOPTER TO 30 KIAS USING 50 TO 60% PWR AT AN ALT OF 700 FT AGL. PLT THE HEARD 'TWO BEEPS' FROM THE ENG OUT WARNING HORN, SAW ENG OUT ANNUNCIATOR LIGHTS ILLUMINATE & THE 'TURBINE NEDDLE DROPPING.' PLT 'BOTTOMED'THE COLLECTIVE, LOWERING THE NOSE, BUT HELICOPTER DESCENDED WHILE YAWING LEFT AND RIGHT UNTIL CONTACTING A CREEK BED. INSPECTION OF THE ACFT REVEALED THE PC LINE WAS BROKEN HUST PAST THE 90 DEG BEND WHERE IT CONNECTS TO THE GAS PRODUCER FUEL CONTROL. THE OTHER END OF THE BREAK WAS CONCEALED BY A B-NUT. METALLURGICAL TESTING REVEALED THE LINE FAILED DUE TO FATIGUE. AREAS OF FRETTING AND DIMPLING WERE FOUND ON THE LINE. THE ENGINE IN N99TV WAS REMOVED FROM THE ACFT ON 11/14/83 AND AGAIN ON 9/6/84. EACH REMOVAL NECESSITATED UNFASTENING AND FASTENING OF THE PC LINE.

Quoted verbatim from the NTSB record.