Consolidated Aeronautics Inc. LAKE LA-4-200 accident near San Juan, Puerto Rico, April 22, 1986
On April 22, 1986 at about 2:30 pm local time, a Consolidated Aeronautics Inc. LAKE LA-4-200, registered N6155V, was substantially damaged in an accident near San Juan, Puerto Rico (Isla Grade airport). It was an instructional flight 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
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
- April 22, 1986 · about 2:30 pm local time
- Place
- San Juan, Puerto Rico · Isla Grade
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Consolidated Aeronautics Inc. LAKE LA-4-200 LAKE LA-4- · all LAKE LA-4-200s on the register
- Registration
- N6155V · registry record · serial 809
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PLT STATED THAT ON LANDING THE ACFT STARTED TO PORPOISE.HE LOST CONTROL, THE LANDING GEAR COLLAPSED AND THE ACFT SLID TO A STOP ON THE RWY.
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: student
- Flight time: 70 hours in all; 34 in this make and model; 32 in the last 90 days; 2 as pilot in command
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 839 hours
- Last inspection: annual inspection, December 20, 1985
- Maximum gross weight: 2,690 lb
- Seats: 4
- Landing gear: retractable
- Engine: Lycoming IO-360-A1B (piston); 0 hours total
The flight
- Flight plan: none
- Runway 9, 5,300 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 080° at 9 knots
- Visibility: 15 statute miles
- Sky: scat at 3,000 ft
- Temperature: 82°F (28°C), dew point 75°F (24°C)
- Altimeter: 30.00 inHg
- Observation at 1:44 pm from SJU, 5 miles away
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.
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.