Cirrus SR22 N101CD

Summary

On 5 October 2008 at about 16:30 local time, a Cirrus SR22 registered N101CD, operated by Tiger Jones Aircraft Inc, was involved in an incident near Lakeland, Florida, United States. One person was on board and nobody was injured. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

5 October 2008 at 16:30

Classification

Incident

Location

Lakeland, Florida, United States

Nearest airport

Lakeland Linder Regional Apt. (LAL)

Coordinates

27.9964, -82.0183

Aircraft

Cirrus SR22

Registration

N101CD

Category

Airplane

Engines

1

Operator

Tiger Jones Aircraft Inc

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Daytona Beach → Lakeland

Aircraft damage

Minor

Weather

VMC

Light

Day

NTSB number

ERA09IA009

Nobody was injured.

A failure of the flap actuator rod end due to low stress, high cycle fatigue, and subsequent overstress failure.

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

Read the full NTSB narrative

While approaching the destination airport, the pilot attempted to extend the flaps to the 50-precent position. After moving the selector, the pilot heard a "bang" and the airplane rolled right. The pilot maintained control of the airplane, and after landing noted that the flaps were extended asymmetrically. Post-incident examination of the flap system revealed that flap actuator rod end was bent 90 degrees, and broken. No other anomalies of the flap system were found. The condition of the flap actuator rod end suggested that the rod end was bent initially while retracting the flaps, an action associated with extension of the flap actuator. This resulted in cracks forming at the thread roots along the outer bend. Subsequent attempts to extend the flaps placed the rod end under a reverse bending moment that acted to straighten the rod end. The manufacturer's assessment of the situation in a service bulletin concluded that the flaps could have been retracted beyond the full up position, possibly due to a sensor failure, initially bending the rod end. During a subsequent deployment, during the incident flight, the flaps over-deployed and allowed the flap actuator linkages to over-center. The rod end subsequently failed, and allowed the asymmetric flap condition.

Quoted verbatim from the NTSB record.