Cessna 172RG N9506D

Summary

On 15 February 1999 at about 21:15 local time, a Cessna 172RG registered N9506D was involved in an accident near Lawrenceville, Illinois, 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

15 February 1999 at 21:15

Classification

Accident

Location

Lawrenceville, Illinois, United States

Nearest airport

Lawrenceville Airport (LWV)

Coordinates

38.7199, -87.6800

Aircraft

Cessna 172RG

Registration

N9506D

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CHI99LA092

Nobody was injured.

the fatigue fracture of the landing gear actuator.

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

Read the full NTSB narrative

During climb-out both pilots heard a pop from the right side of the aircraft under the right seat. The CFI performed a landing gear extension. The left landing gear would extend and lock, but the right main gear would extend partially and then retract simultaneously as the left main landing gear would lower and lock. The manual landing gear extension procedures were tried, but the right main landing gear failed to extend. An emergency landing was attempted. The airplane veered off the right side of the runway during the landing rollout. The right wing and right horizontal stabilizer were damaged when they impacted the ground. The examination of the right main landing gear actuator assembly revealed the actuator body was cracked in two locations near the cups for the bearings. One of the cracks had fatigue striations that originated at the corner formed by the intersection of the 2.25 inch inner-diameter surface of the gear housing and the 1.0 inch inner-diameter surface of the linear actuator portion of the actuator housing. The examination of the corner revealed the presence of circumferential scouring marks consistent with grinding or filing marks. The maintenance logbooks indicated that the landing gear actuator was originally equipped on the airplane and had a total of approximately 7,000 flight hours and 21,000 cycles. There is no life or component time limit listed for the component by the airplane manufacturer.

Quoted verbatim from the NTSB record.