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Accidents · NTSB MIA86LA242 · Preliminary: the investigation is not finished

Piper PA-28-140 accident near Fort Pierce, Florida, August 25, 1986

On August 25, 1986 at about 2:10 pm local time, a Piper PA-28-140, registered N6460W, was substantially damaged in an accident near Fort Pierce, 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 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
August 25, 1986 · about 2:10 pm local time
Place
Fort Pierce, Florida
Type
Accident
Injuries
No one was hurt; 2 people were on board or involved.
Weather
visual conditions (good weather)
Aircraft
Piper PA-28-140 · all PA-28-140s on the register
Registration
N6460W · no longer on the register · serial 28-20533
Damage
Substantial damage
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

WHILE IN CRUISE FLT THE ACFT'S ENG FAILED AND THE ACFT WAS DITCHED IN A RIVER. POST CRASH ENG EXAM REVEALED THE NO. 1 AND NO. 2 CONNECTING RODS SEPARATED FROM THE CRANKSHAFT WHEN BOTH BOLTS FAILED ON THE NO. 1 ROD AND 1 BOLT FAILED ON THE NO. 2 ROD. METALLURGICAL EXAM OF THE BOLTS REVEALED THE ROCKWELL HARDNESS OF THE NO. 1 ROD BOLTS VARIED FROM 26 TO 44 AT VARIOUS POINTS AND THE HARDNESS OF THE FAILED NO. 2 ROD BOLT VARIED FROM 41.6 TO 42.2. MICROSTRUCTURE ANALYSIS OF THE FAILED BOLTS INDICATED THE STRUCTURE VARIED FROM PRIMARILY FERRITE NEAR THE LOW HARDNESS AREAS TO PRIMARILY MARTENSITE NEAR THE HIGHER HARDNESS AREAS. THE CHANGE IN MICROSTRUCTURE INDICATES THAT ALTHOUGH BLOCKAGES WERE NOT OBVIOUS IN THE LUBRICATION SYSTEM, THE BOLTS WERE SUBJECTED TO EXCESSIVE HEAT. THE NO. 1 AND NO. 2 CONNECTING ROD CRANKSHAFT JOURNALS INDICATED EVIDENCE OF SCORING AND DARKENING.

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
  • Flight time: 641 hours in all; 185 in this make and model; 4 in the last 90 days; 501 as pilot in command
  • Medical certificate: Class 2 (valid medical--no waivers/lim.)
  • Seat: left

The aircraft

  • Airframe total time: 2,860 hours
  • Last inspection: annual inspection, July 6, 1986; 34 hours since
  • Maximum gross weight: 2,150 lb
  • Seats: 4
  • Landing gear: fixed
  • Engine: Lycoming O-320-E2A (piston); 0 hours total

The flight

  • Departed from: PMP Pompano Beach FL at 1:19 pm
  • Destination: FPR Fort Pierce FL
  • Flight plan: none
  • Runway 0

Weather at the time

  • Light: daylight
  • Wind: from 200° at 4 knots
  • Visibility: 5 statute miles
  • Sky: scat at 2,500 ft
  • Temperature: 86°F (30°C), dew point 75°F (24°C)
  • Altimeter: 30.00 inHg
  • Observation at 2:23 pm from VRB, 15 miles away

Injuries

FatalSeriousMinorNone
Crew1
Passengers1

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.