Cessna 172N N75958

Summary

On 24 March 2000 at about 22:15 local time, a Cessna 172N registered N75958 was involved in an accident near Maud, Oklahoma, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

24 March 2000 at 22:15

Classification

Accident

Location

Maud, Oklahoma, United States

Coordinates

35.1303, -96.7698

Aircraft

Cessna 172N

Registration

N75958

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Route

Norman → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

FTW00LA107

Nobody was injured.

the loss of engine power while maneuvering as a result of the separation of the exhaust rocker arm retaining stud due to fatigue, which resulted in a precautionary landing.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The flight instructor and private pilot receiving instruction were practicing basic maneuvers, during an instrument training flight, when the airplane began to 'vibrate violently.' They retarded the throttle, checked the magnetos, and then performed a precautionary landing to an open field. During the landing roll, the right horizontal stabilizer impacted a fence. An FAA inspector reported that the #3 exhaust rocker arm retaining stud separated. A section of stud was found lodged beneath the intake rocker arm, and the remaining portion of the stud remained seated in the cylinder head assembly. Metallurgical examination revealed that the stud failed due to fatigue that originated at the thread root from multiple origins.

Quoted verbatim from the NTSB record.