Bell 47G-2 accident near Centralia, Washington, June 24, 1989
On June 24, 1989 at about 3:45 pm local time, a Bell 47G-2 (helicopter), registered N1161N, was destroyed in an accident near Centralia, Washington. It was an aerial application (crop spraying) flight under agricultural flying rules (Part 137). 1 person had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT MISJUDGED HIS CLEARANCE OVER TREES, WHICH RESULTED IN AN IN-FLIGHT TAIL ROTOR STRIKE WITH THE TREES AND LOSS OF TAIL ROTOR CONTROL. THE TREES WERE A RELATED FACTOR.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 24, 1989 · about 3:45 pm local time
- Place
- Centralia, Washington · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Bell 47G-2 · all 47G-2s on the register
- Registration
- N1161N · no longer on the register · serial 42
- Damage
- Destroyed
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
THE PLT WAS MAKING A TURN AROUND MANEUVER OVER TREES BETWEEN SWATH RUNS, WHEN HE HEARD A LOUD 'POP' & LOST TAIL ROTOR CONTROL. THE HELICOPTER BEGAN ROTATING & THE PLT INITIATED AN AUTOROTATION. HOWEVER, THE HELICOPTER IMPACTED WHILE IT WAS ROTATING, THEN IT ROLLED OVER. AN EXAM OF THE TAIL ROTOR DRIVE SYS REVEALED DAMAGE TO THE TAIL ROTOR BLADES, AS WELLAS TORSIONAL FAILURE OF THE TAIL ROTOR DRIVE SHAFT, BUT NO PREIMPACT PART FAILURE WAS FOUND.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: commercial pilot
- Ratings: rotorcraft: helicopter
- Flight time: 6,000 hours in all; 6,000 in this make and model; 125 in the last 90 days; 50 in the last 30 days; 6,000 as pilot in command
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 9,852 hours
- Last inspection: annual inspection, January 12, 1989; 130 hours since
- Maximum gross weight: 2,450 lb
- Seats: 3
- Landing gear: fixed
- Engine: Lycoming TVO-435 (piston); 0 hours total
The flight
- Departed from: Centrailia WA at 3:15 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 270° at 3 knots
- Visibility: 55 statute miles
- Sky: clear
- Temperature: 75°F (24°C), dew point 55°F (13°C)
- Altimeter: 29.00 inHg
- Observation at 4:57 pm from OLM, 20 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.