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NTSB Report
September 13, 1984 · Bell 206L-3 · N99TV
Denver, CO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 13, 1984
Injury Outcomes
3 injuries (2 serious injuries, 1 minor injury)
Location
Denver, CO
Aircraft
Bell 206L-3
Tail Number
N99TV
Operator
Kusa-Tv
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
DEN84FA290
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.
Full 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.
Flight
Event TypeAccident
Event Time06:58 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206L-3
Tail NumberN99TV
Aircraft CategoryHeli
DamageDestroyed
OperatorKusa-Tv
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C30P · Turboshaft · 435
Seats5
People & Injuries
Injury Summary3 injuries (2 serious injuries, 1 minor injury)
Fatal0
Serious2
Minor1
Uninjured0
Total3
Crew 1Age 48 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind160° @ 3 kt
Visibility50 sm
CeilingBroken clouds 9500 ft
Temperature / Dew Point57 / 48
Altimeter30.00 inHg
Observation Time13:29
Weather SourceWFAC