Hughes 369D N446TN
29 November 1989 · Stayton, Oregon, United States · No injuries
Summary
On 29 November 1989 at about 19:45 local time, a Hughes 369D registered N446TN, operated by Associated Helicopter Svcs, was involved in an accident near Stayton, Oregon, United States. One person was on board and nobody was injured. 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 19:45
- Classification
- Accident
- Location
- Stayton, Oregon, United States
- Coordinates
- 44.8092, -122.7194
- Aircraft
- Hughes 369D
- Registration
- N446TN
- Category
- Helicopter
- Engines
- 1
- Operator
- Associated Helicopter Svcs
- Operating rule
- Part 133: Rotorcraft Ext. Load
- Purpose of flight
- Other Work Use
- Phase of flight
- Not recorded
- Route
- Stayton → Unknown
- Aircraft damage
- Substantial
- Weather
- IMC
- Light
- Day
- NTSB number
- SEA90LA023
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
THE MAINTENANCE PERSONNEL FAILED TO RECORD THE PREVIOUS FLIGHT TIME FOR THE OVERRUNNING CLUTCH ON AIRWORTHINESS CERTIFICATION DOCUMENTS WHEN THE ASSEMBLY WAS OVERHAULED. ALSO, CAUSAL TO THE ACCIDENT WAS THE OPERATION OF THE AIRCRAFT BY THE OPERATOR FOR 175 HOURS AFTER MANDATORY RETIREMENT TIME FOR THE SPRAGUE ASSEMBLY.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
WHILE HOVERING TO PICK UP AN EXTERNAL LOAD, THE PILOT EXPERIENCED LOSS OF ROTOR RPM AND EXECUTED A HOVERING AUTOROTATION. THE ACFT IMPACTED THE GROUND AND WAS SUBSTANTIALLY DAMAGED. EXAMINATION OF THE OVERRUNNING CLUTCH REVEALED FATIGUE FAILURE OF THE OVERRUNNING CLUTCH ASSY. WHEN THE CLUTCH WAS OVERHAULED, THE PREVIOUS TIME WAS LISTED AS UNKNOWN. IT WAS INSTALLED ON THE ACCIDENT ACFT AND OPERATED 175 HOURS PAST MANDATORY REPLACEMENT.
Quoted verbatim from the NTSB record.
Other Hughes 369 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 30 May 1989 | Hughes 369HS | Niagara Falls, New York, United States | Rainbow Helicopters, Inc. | No injuries | - |
| 22 Oct 1989 | Hughes 369HS | Ogilvie, Minnesota, United States | - | No injuries | - |
| 14 Dec 1989 | Hughes 369E | Stroud, Oklahoma, United States | Tulsa Police Dept | No injuries | - |
| 15 Nov 1989 | Hughes 369HS | North Adams, Massachusetts, United States | King Services Inc. | Fatal | 2 |
| 31 Mar 1989 | Hughes 369D | Vallejo, California, United States | Helinet, Inc. | No injuries | - |
| 9 Dec 1989 | Hughes 369HS | Waimea, Hawaii, United States | Air Kaui, Inc. | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 15 Nov 1989 | Hughes 269C | Estacada, Oregon, United States | Helicopter Enterprises | Fatal | 1 |
| 30 Oct 1989 | Bellanca 17-30 | Newberg, Oregon, United States | BEN F. Smithers | No injuries | - |
| 25 Dec 1989 | Cessna 172M | Salem, Oregon, United States | - | No injuries | - |
| 4 Mar 1989 | Piper PA-60-601P | Lakeview, Oregon, United States | - | Fatal | 3 |
| 23 Jun 1989 | Piper PA-28-181 | Chiloquin, Oregon, United States | Southwest Air Charter | Serious injuries | - |
| 3 Jul 1989 | Piper PA-22-150 | Elgin, Oregon, United States | - | Fatal | 3 |