Cessna 172RG N9781B

Summary

On 26 March 1994 at about 17:15 local time, a Cessna 172RG registered N9781B was involved in an accident near Boca Raton, Florida, 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

26 March 1994 at 17:15

Classification

Accident

Location

Boca Raton, Florida, United States

Nearest airport

Boca Raton (BCT)

Coordinates

26.3694, -80.0992

Aircraft

Cessna 172RG

Registration

N9781B

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

MIA94LA103

Nobody was injured.

The failure of the aircraft operator to comply with engine manufacturers service bulletins which resulted in improper inspection of exhaust valves and subsequent sticking of the no. 4 exhaust valve.

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

Read the full NTSB narrative

The aircraft's engine lost partial power during climb after takeoff. The aircraft would not maintain altitude and a forced landing was made in a wooded area. Postcrash examination of the engine indicated the No. 4 exhaust valve had stuck and the exhaust valve pushrod was bent. No other engine malfunctions were noted. Textron Lycoming Engines issued mandatory service bulletin 388B on May 13, 1992, requiring the testing of the exhaust valve clearances each 400 flight hours on aircraft. The logbook records for N9781B did not have any entries showing compliance with service bulletin 388B.

Quoted verbatim from the NTSB record.