Mooney M20F N9121V

Summary

On 5 September 1984 at about 16:00 local time, a Mooney M20F registered N9121V, operated by Robert B Anderson JR, was involved in an incident near Saratoga, Wyoming, United States. 2 people were on board and nobody was injured. The aircraft was slightly damaged. No probable cause statement is available for this record.

Date

5 September 1984 at 16:00

Classification

Incident

Location

Saratoga, Wyoming, United States

Coordinates

41.4507, -106.8102

Aircraft

Mooney M20F

Registration

N9121V

Category

Airplane

Engines

1

Operator

Robert B Anderson JR

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Fort Collins → Pocatello

Aircraft damage

Minor

Weather

VMC

Light

Day

NTSB number

DEN84IA281

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

WHILE IN LEVEL CRUISE FLT AT 10500 FT, THE PLT HEARD A HIGH-PITCHED WHINE THAT LASTED FOR ABOUT 5 SECONDS. THE ENGINE THEN SEIZED AND THE PLT MADE A FORCED LANDING IN MOUNTAINOUS FOOTHILLS. DURING THE LANDING ROLL, THE LANDING GEARCOLLAPSED. EXAMINATION OF THE DISASSEMBLED ENGINE REVEALED EVIDENCE OF HIGH HEAT DISTRESS AND A FRACTURED CRANKSHAFT. DETAILED EXAMINATION OF THE CRANKSHAFT REVEALED EVIDENCE OF A LACK OF LUBRICATION AND FATIGUE. MAINTENANCE RECORDS REVEALED THAT THE ACFT WAS INVOLVED IN A GEAR COLLAPSE INCIDENT IN 1977 THAT RESULTED IN A PROP STRIKE AND SUDDEN ENGINESTOPPAGE. THE ENGINE WAS NOT DISASSEMBLED AND INSPECTED AT THAT TIME AS SUGGESTED BY AVCO LYCOMING SERVICE LETTER NO. L163B.

Quoted verbatim from the NTSB record.