Piper PA-22-108 N4595Z

Summary

On 11 July 1999 at about 18:30 local time, a Piper PA-22-108 registered N4595Z was involved in an accident near Isle of Wight, Virginia, United States. One person was 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

11 July 1999 at 18:30

Classification

Accident

Location

Isle of Wight, Virginia, United States

Coordinates

Not recorded

Aircraft

Piper PA-22-108

Registration

N4595Z

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Hampton Roads → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

NYC99LA172

Nobody was injured.

The improper visual inspection of overhauled engine components by maintenance personnel.

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

Read the full NTSB narrative

The pilot stated that the airplane began to vibrate slightly while in cruise flight, and he decided to return to the airport. The engine then began to shake violently, and the pilot performed a forced landing. The airplane landed short, nosed over, and came to rest inverted. Examination of the wreckage revealed that the left rear cylinder on the engine had separated from it's mounting flange. The engine had accumulated about 13 hours since overhaul, when all four cylinders were replaced on the engine with chromed cylinders purchased from an outside source, then overhauled by the engine overhaul facility. During the metallurgical examination of the failed cylinder, a fatigue origin was found near the bottom of the fin radius, between the tenth and eleventh fins from the inboard end of the cylinder barrel. Severe corrosion attack was also observed on the fin immediately adjacent to the fatigue origin location. Corrosion damage was also noted in the radius, including a corrosion pit from which the crack arrest features appeared to emanate. The corrosion pit was filled with a non-conductive substance.

Quoted verbatim from the NTSB record.