Cessna 172R N77AF

Summary

On 19 July 2009 at about 17:30 local time, a Cessna 172R registered N77AF, operated by American Flyers Inc, was involved in an incident near West Chicago, Illinois, United States. 2 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

19 July 2009 at 17:30

Classification

Incident

Location

West Chicago, Illinois, United States

Nearest airport

Dupage Airport (DPA)

Coordinates

41.8794, -88.2209

Aircraft

Cessna 172R

Registration

N77AF

Category

Airplane

Engines

1

Operator

American Flyers Inc

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Route

West Chicago → West Chicago

Aircraft damage

Not recorded

Weather

VMC

Light

Day

NTSB number

CEN09IA456

Nobody was injured.

A partial loss of engine power due to the detachment of the throttle control cable from the throttle assembly during a landing approach. Contributing to the accident was the lack of a redundant means to preclude the detachment of the cable from the throttle assembly.

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

Read the full NTSB narrative

A previous maintenance entry in the airplane logbook indicated that the firewall was replaced and the airplane returned to service. The airplane had been operated for about 63 hours when the throttle control cable became unscrewed from the rod end of the throttle assembly during an instructional flight. The flight instructor and student pilot lost throttle control during an approach to a destination airport when engine speed increased to about 2,200-2,300 rpm. The flight instructor landed the airplane without further incident. The throttle control assemblies for the airplane do not have a key way at the throttle control knob to prevent rotation of the cable and unscrewing of the cable from the rod end should the jamnut become loose. The operator recommended that a safety device and not just a jamnut be installed to prevent the throttle control from disconnecting from the rod end.

Quoted verbatim from the NTSB record.