# NTSB ANC84FA091: Bell 206L-1, N5751Q, Whittier, AK, June 14, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: June 14, 1984, 14:10 local (22:10 UTC)
- Place: Whittier, AK
- Coordinates: 61.220962, -149.850204 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.2210&lon=-149.8502&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4213
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84FA091
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4213/pdf
- Page: https://openairdocs.org/ntsb/ANC84FA091

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - nonmechanical, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- In flight collision with terrain/water, descent - emergency
  - performance data - exceeded, pilot in command (cause)

## Analysis

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.

## Aircraft

- Registration: N5751Q (not matched to a registry record)
- Reported make and model: BELL 206L-1
- Category: Helicopter
- Serial number: 045524
- Airframe hours: 2551
- Engines: ALLISON A250-C28B 435 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Air Logistics, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, May 3, 1984, 71 hours before
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; commercial; instrument ratings: helicopter; medical: valid medical--w/ waivers/lim; seat: right; flight hours: 3,180 total, 310 in this make and model, 2,500 as pilot in command, 86 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 7 statute miles
- Lowest ceiling: 1,800 ft broken
- Temperature: 48 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840614026309A](https://openairdocs.org/incident/19840614026309A), Jun 14, 1984: Bell 206L1, Whittier, AK, Substantial damage. Vertical takeoff, blade stall transitioning to forward flight. Rotor rpms dropped, settled to ground.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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