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Atlas / NTSB / LAX92LA278

NTSB CAROL · Event

Event LAX92LA278

1992-07-03 MESA, Arizona, United States Minor 1 aircraft Status: Completed

Registry · N4798R

FAA Aircraft Registry record.

Make / Model

BELL 47G-5

Year of manufacture

1968 · 24 years old at event

TCDS

2H3 · SCOTT'S-BELL 47 INC

Engine

LYCOMING VO-435 SERIES (260 hp)

Seats / Engines

3 seats · 1 engine

Last airworthiness date

20021105

ADS-B equipped

Yes — Mode-S A5E609

Registrant of record

TRIPLE F FLYING INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

A PARTIAL LOSS OF ENGINE POWER DUE TO UNKNOWN REASON (S). FACTORS IN THIS ACCIDENT WERE 1) LOW ALTITUDE WHEN THE PARTIAL LOSS OF POWER OCCURRED 2) LOW ROTOR RPM AS A RESULT OF THE LOSS OF POWER, AND 3) THE PILOT NOT BEING ABLE TO TAKE REMEDIAL ACTION DUE TO THE LOW ALTITUDE AND ROTOR RPM.

Factual narrative

ACCORDING TO A WITNESS, THE PILOT WAS PERFORMING A TAKEOFF AFTER THE HELICOPTER HAD BEEN LOADED WITH ABOUT 60 GALLONS OF INSECTICIDE. THE HELICOPTER ATTAINED AN ALTITUDE OF ABOUT 50 TO 60 FEET ABOVE THE GROUND WHEN THE WITNESS OBSERVED THE TAIL ROTOR MOVE LATERALLY ABOUT 4 TO 5 FEET. THE WITNESS SAID HE SAW THE AIRCRAFT SETTLE TO THE GROUND AND LAND HARD. HE SAID HE IMMEDIATELY ASKED THE PILOT WHAT HAPPENED. THE PILOT REPORTEDLY TOLD THE WITNESS THAT HE HAD A 'POWER DROOP.' THE CAUSE OF THE PARTIAL LOSS OF POWER WAS NOT DETERMINED. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1992_LAX92LA278.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.