Bell 47-G2A N52HB
30 April 1992 · Dousman, Wisconsin, United States · Serious injuries
Summary
On 30 April 1992 at about 15:45 local time, a Bell 47-G2A registered N52HB, operated by MC Dermott Enterprises, Inc., was involved in an accident near Dousman, Wisconsin, United States. 2 people were on board and one was seriously injured, one had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 15:45
- Classification
- Accident
- Location
- Dousman, Wisconsin, United States
- Coordinates
- 43.0107, -88.4696
- Aircraft
- Bell 47-G2A
- Registration
- N52HB
- Category
- Helicopter
- Engines
- 1
- Operator
- MC Dermott Enterprises, Inc.
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Instructional
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI92LA137
People
1 person was seriously injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 1 | 1 | 0 |
Probable cause
THE IN-FLIGHT LOSS OF THE SWASH PLATE DRIVE LINK BOLT WHICH ALLOWED THE SWASH PLATE DRIVE ASSEMBLY TO DISCONNECT.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE FLIGHT INSTRUCTOR (CFI) REPORTED THE DUAL INSTRUCTIONAL FLIGHT PROCEEDED WITHOUT INCIDENT FOR THE FIRST HOUR. WHILE RETURNING TO THE AIRPORT IN CRUISE FLIGHT, A SUDDEN AND VERY VIOLENT VIBRATION OCCURRED. THE CFI TOOK THE FLIGHT CONTROLS AND BEGAN AN AUTOROTATION TO AN OFF-AIRPORT SITE, STRIKING TREES DURING THE DESCENT. INSPECTION OF THE ROTOR HEAD DISCOVERED A MISSING SWASH PLATE DRIVE LINK BOLT, WHICH ALLOWED THE DRIVE LINK TO DISCONNECT. BOTH THE CFI AND STUDENT RECALLED CHECKING THE BOLT AND ASSOCIATED NUT AND COTTER PIN PRIOR TO THE FLIGHT AND FOUND NO ANOMALIES. THE BOLT WAS NEVER LOCATED.
Quoted verbatim from the NTSB record.
Other Bell 47 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 2 Apr 1992 | Bell 47-D-1 | Fayette, Mississippi, United States | Darre J. Ward | Minor injuries | - |
| 11 Oct 1992 | Bell 47-D1 | El Monte, California, United States | Ochwatt, Robert & Edward | No injuries | - |
| 14 Jun 1992 | Bell 47G-2 | Danbury, Texas, United States | Salaika, Timothy A. | No injuries | - |
| 21 Jun 1992 | Bell 47-G5A | Pago Pago | Zeta Fishing Company | Serious injuries | - |
| 15 Aug 1992 | Bell 47G-2 | Slocomb, Alabama, United States | Diamond, John J. | Serious injuries | - |
| 24 Mar 1992 | Bell 47G-2 | Pikeville, Kentucky, United States | Sammy D. Goff | No injuries | - |
All 1,633 records for this type
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 21 Nov 1992 | Piper PA-28-140 | Brookfield, Wisconsin, United States | Brookfield Pilot Service, Inc. | Fatal | 2 |
| 3 Oct 1992 | Stinson 108-3 | Mountain, Wisconsin, United States | Hartman, Phillip W. | Minor injuries | - |
| 5 Oct 1992 | Univair 415C | Waukesha, Wisconsin, United States | Carter Aero Club | Minor injuries | - |
| 8 Oct 1992 | Piper PA-34-220T | Madison, Wisconsin, United States | Joseph T. Steuer | No injuries | - |
| 27 Nov 1992 | Cessna 401B | Rice Lake, Wisconsin, United States | Freight Runners Express, Inc. | No injuries | - |
| 1 Dec 1992 | Beechcraft 77 | Milwaukee, Wisconsin, United States | - | Minor injuries | - |