Hughes 369D accident near Carlsbad, California, November 16, 1992
On November 16, 1992 at about 2:34 pm local time, a Hughes 369D (helicopter), registered N220AL, was substantially damaged in an accident near Carlsbad, California. It was a flight of an unrecorded kind under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
FAILURE OF THE OVERRUNNING CLUTCH ASSEMBLY BEARING FOR UNDETERMINED REASONS.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- November 16, 1992 · about 2:34 pm local time
- Place
- Carlsbad, California · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Hughes 369D · all 369Ds on the register
- Registration
- N220AL · registry record · serial 1090606D
- Damage
- Substantial damage
- Flight
- Flight of an unrecorded kind · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING FLIGHT THE AIRCRAFT BEGAN TO VIBRATE SEVERELY, AND THEN THERE WAS A LOUD BANG. THE AIRCRAFT BEGAN TO DESCEND WITH SMOKE IN THE CABIN, AND THE ENGINE OUT LIGHT AND HORN WAS ACTIVATED. DURING LANDING, THE HELICOPTER SETTLED INTO THE DIRT, ROCKED FORWARD, THEN AFT. ACCORDING TO THE PILOT, THE MAIN ROTOR BLADES STRUCK THE TAIL BOOM DUE TO LOW ROTOR RPM. EXAMINATION REVEALED THAT AN OVERRUNNING CLUTCH BEARING HAD FAILED. A METALLURGICAL EXAMINATION COULD NOT DETERMINE THE CAUSE OF THE FAILURE BECAUSE OF THE EXTENT OF DAMAGE. THE BEARING ASSEMBLY & INNER RACE (SHAFT) WAS EXPOSED TO TEMPERATURES GREATER THAN 1500 DEG F. THE OVERRUNNING CLUTCH WAS REPORTEDLY LUBRICATED 7 HRS PRIOR TO THE ACCIDENT, AT THE LAST 100-HR INSPECTION. THE INSPECTION IS ALSO CONSIDERED A 300-HR INSPECTION; ACCORDING TO MDHC AT THE 300-HR INSPECTION THE BEARING IS TO BE REMOVED, CLEANED, INSPECTED AND REPACKED.
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: instrument: helicopter; rotorcraft: helicopter
- Flight time: 5,805 hours in all; 4,430 in this make and model
- Medical certificate: Class 1 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Last inspection: 100-hour inspection, September 12, 1992; 13 hours since
- Maximum gross weight: 3,000 lb
- Seats: 5
- Landing gear: fixed
- Engine: Allison 250-C20B (turboshaft); 0 hours total
- Operator: Haverfield Corporation
The flight
- Departed from: MYF San Diego CA at 2:20 pm
- Destination: NONE Palomar CA
- Runway 0
Weather at the time
- Light: dusk
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 61°F (16°C), dew point 0°F (-18°C)
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.
Other NTSB records under N220AL the same tail number, which may have belonged to a different aircraft at the time
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.