# NTSB FTW86FRG10: Mooney M20C, N7025V, San Antonio, TX, December 26, 1985

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: December 26, 1985, 14:08 local (20:08 UTC)
- Place: San Antonio, TX
- Coordinates: 29.539432, -98.489501 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=29.5394&lon=-98.4895&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 4 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21964
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86FRG10
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21964/pdf
- Page: https://openairdocs.org/ntsb/FTW86FRG10

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - lubricating system - cracked
  - maintenance,installation - selected, other maintenance personnel (cause)
  - fluid,oil - leak
  - window,cabin - foreign object (contributing factor)
- Dragged wing,rotor,pod,float or tail/skid, landing - flare/touchdown
  - aircraft handling - not maintained, pilot in command (cause)
  - visual/aural perception, pilot in command (cause)

## Analysis

THE ACFT WAS DESTROYED DURING A FORCED LANDING. WHILE EN ROUTE OVER THE SAN ANTONIO AREA THE PLT NOTICED A FEW DROPS OF WHAT HE BELIEVED TO BE PRECIPITATION ON THE WINDSHIELD. SHORTLY THEREAFTER, IT WAS DETERMINED THE DROPS ON THE WINDSHIELD WERE OIL. THE QUANTITY OF OIL INCREASED TO A POINT WHERE THE WINDSHIELD WAS COVERED. THE PLT OPENED THE LEFT COCKPIT WINDOW TO GAIN VISIBILITY AND A LANDING WAS ATTEMPTED ON RWY 27 AT STINSON MUNICIPAL. THE ACFT TOUCHED DOWN LONGWITH THE LEFT WING CONTACTING THE RWY. THE TOWER ADVISED THE PLT TO GO AROUND. THE PLT ADDED FULL PWR, MADE A LEFT CIRCLING TURN AND THE ACFT CONTACTED THE RWY AT THE INTERSECTION OF 27 AND 32. THE PLT STATED THAT DURING THE GO AROUND OIL PRESSURE WAS NOTED AS ZERO. POST ACCIDENT INSPECTION DISCLOSED A CRACKED BRASS PLATED FITTING ON THE PROP GOVENOR OIL LINE AT THE FRONT RIGHT SIDE OF THE ENG. THE FITTING WAS CRACKED THROUGH 3/4 OF ITS CIRCUMFERENCE. THE MANUFACTURERSPART IS ALUMINUM AND NOT BRASS PLATED.

## Aircraft

- Registration: N7025V (not matched to a registry record)
- Reported make and model: MOONEY M20C
- Category: Airplane
- Serial number: 20-1201
- Airframe hours: 2226
- Engines: LYCOMING O-360-A1D 180 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Robert R. Owen
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 23, 1985, 59 hours before
- Departed: 52F, ROANOKE, TX
- Destination: PEZ, PLEASANTON, TX
- Airport: SSF, Stinson Municipal

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 3,065 total, 455 in this make and model, 2,487 as pilot in command, 34 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 6 knots
- Visibility: 12 statute miles
- Lowest ceiling: 2,500 ft overcast
- Temperature: 77 °F, dew point -0 °F
- Altimeter: 30.00 inHg
- Observed at: SSF, 60 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19851226064079A](https://openairdocs.org/incident/19851226064079A), Dec 26, 1985: Mooney M20C, San Antonio, TX, Destroyed. Vectored to airport with oil covered windshield. Crash landed on runway. Improper fitting on governor oil line.

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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