# NTSB BFO85FA041: Mooney M20F, N9107V, Stevensville, MD, April 29, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: April 29, 1985, 12:00 local (16:00 UTC)
- Place: Stevensville, MD
- Coordinates: 38.990894, -76.299964 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.9909&lon=-76.3000&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 11131
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO85FA041
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11131/pdf
- Page: https://openairdocs.org/ntsb/BFO85FA041

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, cruise - normal
  - lubricating system,oil line - cracked (cause)
  - lubricating system,oil line - overtorque (cause)
  - fluid,oil - leak (cause)
  - precautionary landing - performed, pilot in command
- Fire, cruise - normal
- Fire, taxi - from landing

## Analysis

THE PLT STATED THAT WHEN IN NORMAL CURISE AT 3000 FT OVER CASTLE MARINA ARPT HE NOTICED EXCESSIVE OIL AND CYLINDER HEAD TEMPS. A CONCURRENT SMALL AMOUNT OF SMOKE WAS EMANATING FROM THE INSTRUMENT PANEL WHICH PROMPTED THE PLT TO EXECUTE A PRECAUTIONARY LNDG AT CASTLE MARINA. WHILE TAXIING FROM LDG, THE SMOKE FROM THE INSTRUMENT PANEL THICKENED. THE PLT SHUT DOWN THE SYSTEMS AND ENGINE (WHICH HAD CONTINUED TO RUN NORMALLY), AND EVACUATED THE AIRPLANE. FLAMES THEN ENGULFED AND DESTROYED THE CABIN AREA AND INST PNL. A MECHANIC DISCOVERED A CRACKED OIL PRESSURE GAGE LINE. THIS LINE IS SITUATED ABOVE THE TAIL PIPE AND IS ADJACENT TO A WIRE BUNDLE THAT POWERS THE ENGINE INSTRUMENTS. THE CRACK OCCURRED UNDER THE REDUCTION FITTING NUT, AND METALLURGICAL EXAMINATION REVEALED EVIDENCE OF OVERTIGHTENING.

## Aircraft

- Registration: [N9107V](https://openairdocs.org/deregistered/N9107V-2013-10-24), registration cancelled 2013-10-24, S/N 690024, built 1969 (OpenAirDocs)
- Reported make and model: MOONEY M20F
- Registry model: [Mooney M20F](https://openairdocs.org/model/mooney-m20f) (registry code 5870214) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 690024
- Airframe hours: 2200
- Engines: LYCOMING IO-360-A1A 200 horsepower reciprocating
- Damage: Destroyed
- Fire: In-Flight
- Flight: Personal, Part 91
- Registered owner: Daniel S. Roberson
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, October 1, 1984, 75 hours before
- Departed: W00, MITCHELLVILLE, MD
- Airport: OW6, Castle Marina, runway 1, 2,700 × 20 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 350 total, 350 in this make and model, 250 as pilot in command, 19 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 11 knots, gusting 19
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 36 °F
- Altimeter: 30.00 inHg
- Observed at: BWI, 21 nm away

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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