Hughes 369HS accident near Aiken, South Carolina, June 7, 1985
On June 7, 1985 at about 9:45 pm local time, a Hughes 369HS (helicopter), registered N9146F, was substantially damaged in an accident near Aiken, South Carolina (Aiken Muni airport). It was a business flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 7, 1985 · about 9:45 pm local time
- Place
- Aiken, South Carolina · Aiken Muni · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Hughes 369HS · all 369HSs on the register
- Registration
- N9146F · registry record · serial 830508S
- Damage
- Substantial damage
- Flight
- Business flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING A LANDING, THE ENG LOST POWER & THE HELICOPTER TOUCHED DOWN HARD. THE PLT STATED THAT PRIOR TO THE 15 MIN FLT, THE FUEL GAGE WAS INDICATING 125 LBS OF FUEL & AT THE ACCIDENT SITE IT INDICATED 90 LBS OF FUEL. A POST CRASH INSPECTION OF THE FUEL SYSTEM REVEALED THAT 3 SUPPORT BRACKETS WERE NOT INSTALLED IN THE FUEL CELL & ONLY A TRACE OF FUEL WAS REMAINING. THE ABSENCE OF THE BRACKETS PERMITTED THE FUEL CELL TO COLLAPSE AS FUEL WAS CONSUMED & RESULTED IN ERRONEOUS FUEL GAGE READINGS. THE FUEL LOW CAUTION INDICATOR WAS ALSO FOUND TO BE INOPERATIVE DUE TO A CANNON PLUG THAT WAS IMPROPERLY WIRED.
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: flight instructor, commercial pilot
- Ratings: single-engine land; instructor: airplane single-engine; instructor: helicopter; rotorcraft: helicopter
- Flight time: 11,664 hours in all; 300 in this make and model; 36 in the last 90 days; 11,444 as pilot in command
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 1,840 hours
- Last inspection: 100-hour inspection, January 13, 1985
- Maximum gross weight: 2,550 lb
- Seats: 5
- Landing gear: fixed
- Engine: Allison 250-C18A (turboshaft); 0 hours total
The flight
- Departed from: Saluda SC at 9:30 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 180° at 5 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 91°F (33°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.