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Accidents · NTSB BFO91LA003 · Final report

Mooney M20M accident near Culpeper, Virginia, October 13, 1990

On October 13, 1990 at about 7:10 pm local time, a Mooney M20M, registered N987CM, was destroyed in an accident near Culpeper, Virginia (Culpeper airport). It was a personal flight under general aviation rules (Part 91). 2 people were seriously injured. The weather was visual conditions (good weather).

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The NTSB's probable cause their words, unchanged

INTERGRANULAR CRACKING (FATIGUE) FAILURE OF THE EXHAUST CLAMP, WHICH RESULTED IN A DISCONNECTED EXHAUST MANIFOLD (TAILPIPE), AND SUBSEQUENT FIRE IN THE ENGINE COMPARTMENT.

Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.

What the record shows

Date
October 13, 1990 · about 7:10 pm local time
Place
Culpeper, Virginia · Culpeper · map
Type
Accident
Injuries
2 people were seriously injured.
Weather
visual conditions (good weather)
Aircraft
Mooney M20M · all M20Ms on the register
Registration
N987CM · registry record · serial 27-0013
Damage
Destroyed
Flight
Personal flight · general aviation rules (Part 91)

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

THE PILOT INDICATED THAT DURING AN APPROACH TO LAND, HE NOTED THE SMELL OF A POSSIBLE OVERHEAT CONDITION, BUT THE ODOR WENT AWAY. HE CHECKED THE ACFT AFTER LANDING, BUT DID NOT NOTICE ANY DISCREPANCIES. HE TOOK OFF SHORTLY AFTERWARDS, AND DURING THE CLIMBOUT, SMOKE BEGAN FILLING THE CABIN. THE SMOKE EMERGED FROM THE AREA OF THE RUDDER PEDALS AND FLAMES APPEARED SOON AFTERWARDS. THE PLT TURNED BACK TO THE AIRPORT AND LANDED GEARUP. THE ACFT SLID OFF THE RUNWAY AND INTO A DITCH. A FIRE ERUPTED, BUT THE PLT AND PAX ESCAPED THE ACFT. AN INVESTIGATION REVEALED INTERGRANULAR CRACKING OF THE CLAMP THAT CONNECTED THE TURBOCHARGER AND TAILPIPE.

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: private
  • Ratings: multi-engine land; single-engine land; instrument: airplane
  • Flight time: 2,000 hours in all; 193 in this make and model; 83 in the last 90 days; 37 in the last 30 days; 1,885 as pilot in command
  • Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
  • Seat: left

The aircraft

  • Airframe total time: 199 hours
  • Last inspection: inspection type not recorded, May 18, 1990; 74 hours since
  • Maximum gross weight: 3,368 lb
  • Seats: 4
  • Landing gear: retractable
  • Engine: Lycoming TIO-540-AFIA (piston); 0 hours total

The flight

  • Departed from: W49 at 7:10 pm
  • Destination: W10 Manassas VA
  • Flight plan: none
  • Runway 4, 4,000 ft by 75 ft

Weather at the time

  • Light: daylight
  • Wind: from 310° at 6 knots
  • Visibility: 30 statute miles
  • Sky: broken clouds at 11,000 ft; scat at 3,100 ft
  • Temperature: 79°F (26°C), dew point 70°F (21°C)
  • Altimeter: 29.70 inHg
  • Observation at 6:50 pm from IAD, 15 miles away

Injuries

FatalSeriousMinorNone
Crew1
Passengers1

About this page

Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number BFO91LA003.