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NTSB Report
June 14, 1984 · Bell 206L-1 · N5751Q
Whittier, AK
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 14, 1984
Injury Outcomes
No injuries (3 uninjured)
Location
Whittier, AK
Aircraft
Bell 206L-1
Tail Number
N5751Q
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC84FA091
THE HELICOPTER EXPERIENCED AN ENG POWER LOSS DURING TAKEOFF AND DESCENDED INTO MARSHY TERRAIN. THE PIC STATED THAT HE WAS DEPARTING FROM A CONFINED AREA & AT 90% TORQUE THE ACFT ROSE TO 50 FT AGL. HE THEN ROSE TO 200 FT AGL BUT COULD NOT RECALL POWER SETTINGS. UPON REACHING 200 FT AGL HE NOSED THE ACFT OVER TO ACCELERATE AND BANKED LT USING APPROX 20 DEG BANK. HE FELT THE ACFT SHUDDER AND IT BEGAN TO SETTLE; HE ADDED POWER AND THE LOW RPM AUDIO & LIGHT CAME ON. DURING THE DESCENT HE NOTICED N2 RPM DECREASING & IT PASSED THRU 90%; HE LOWERED THE COLLECTIVE & IT STABILIZED AT 80%. HE SAID HE ATTEMPTED TO REGAIN RPM BY 'PUMPING' THE COLLECTIVE, BUT TO NO AVAIL & THE ACFT CRASHED. EXAMINATION OF THE WRECKAGE AND SUBSEQUENT TESTING DID NOT REVEAL ANY MECHANICAL REASON FOR THE POWER LOSS.
Full Narrative
THE HELICOPTER EXPERIENCED AN ENG POWER LOSS DURING TAKEOFF AND DESCENDED INTO MARSHY TERRAIN. THE PIC STATED THAT HE WAS DEPARTING FROM A CONFINED AREA & AT 90% TORQUE THE ACFT ROSE TO 50 FT AGL. HE THEN ROSE TO 200 FT AGL BUT COULD NOT RECALL POWER SETTINGS. UPON REACHING 200 FT AGL HE NOSED THE ACFT OVER TO ACCELERATE AND BANKED LT USING APPROX 20 DEG BANK. HE FELT THE ACFT SHUDDER AND IT BEGAN TO SETTLE; HE ADDED POWER AND THE LOW RPM AUDIO & LIGHT CAME ON. DURING THE DESCENT HE NOTICED N2 RPM DECREASING & IT PASSED THRU 90%; HE LOWERED THE COLLECTIVE & IT STABILIZED AT 80%. HE SAID HE ATTEMPTED TO REGAIN RPM BY 'PUMPING' THE COLLECTIVE, BUT TO NO AVAIL & THE ACFT CRASHED. EXAMINATION OF THE WRECKAGE AND SUBSEQUENT TESTING DID NOT REVEAL ANY MECHANICAL REASON FOR THE POWER LOSS.
Flight
Event TypeAccident
Event Time14:10 AKDT
Nearest Airport0nm N
Runway0
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206L-1
Tail NumberN5751Q
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 135
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · A250-C28B · Turboshaft · 435
Seats7
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 26 · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility7 sm
CeilingBroken clouds 1800 ft
Temperature / Dew Point48 / 0 C
Altimeter0
Weather SourcePILO