Grumman AA-1C accident near Lantana, Florida, November 22, 1991
On November 22, 1991 at about 2:40 am local time, a Grumman AA-1C, registered N9783U, was substantially damaged in an accident near Lantana, Florida. It was a personal 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 IMPROPER MAINTENANCE ASSEMBLY AND INSPECTION OF THE THROTTLE LINKAGE WHICH RESULTED IN THE THROTTLE LINKAGE BECOMING DISCONNECTED IN FLIGHT AND SUBSEQUENT LOSS OF ENGINE POWER.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- November 22, 1991 · about 2:40 am local time
- Place
- Lantana, Florida · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman AA-1C
- Registration
- N9783U · registry record · serial AA1C0121
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING CRUISE FLIGHT, ENGINE POWER DROPPED TO 1200 RPM AND COULD NOT BE RESTORED. DURING A FORCED LANDING ON A CITY STREET AT NIGHT THE AIRCRAFT COLLIDED WITH TWO VEHICLES. POSTCRASH EXAMINATION OF THE ENGINE REVEALED THE NUT WHICH ATTACHES THE THROTTLE LINKAGE TO THE CARBURETOR WAS MISSING AND THE THROTTLE LINKAGE HAD BECOME DISCONNECTED. THE ENGINE HAD BEEN OVERHAULED 20 FLIGHT HOURS BEFORE THE ACCIDENT.
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: multi-engine land; single-engine land; instrument: airplane
- Flight time: 1,531 hours in all; 392 in this make and model; 319 in the last 90 days; 176 in the last 30 days; 1,204 as pilot in command
- Medical certificate: Class 1 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Last inspection: annual inspection, July 10, 1991; 17 hours since
- Maximum gross weight: 1,560 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-235-L2C (piston); 0 hours total
The flight
- Departed from: BCT Boca Raton FL at 2:30 am
- Destination: LNA Lantana FL
- Flight plan: none
- Runway 0
Weather at the time
- Light: night, bright
- Wind: from 140° at 12 knots
- Visibility: 10 statute miles
- Sky: scat at 2,800 ft
- Temperature: 75°F (24°C), dew point 66°F (19°C)
- Altimeter: 30.00 inHg
- Observation at 2:52 am from PBI, 15 miles away
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.