Accident Beechcraft 200 Super King Air N5584M, Friday 1 February 1991

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Date:	Friday 1 February 1991
Time:	01:13 LT
Type:	Beechcraft 200 Super King Air
Owner/operator:	Beechcraft East
Registration:	N5584M
MSN:	BB1368
Engine model:	P&W PT6A-42
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Indianapolis, IN - United States of America
Phase:	Unknown
Nature:	Executive
Departure airport:	Windsor Locks, CT
Destination airport:	(KIND)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE TWIN-ENGINED TURBO-PROP AIRPLANE WAS DESCENDING FROM 20,000 FEET MSL TO 7,000 FEET MSL WHEN THE LEFT ENGINE AFT, UPPER ACCESSORY CASE COWL SEPARATED FROM ITS MOUNT. THE COWL ASSEMLBY STRUCK THE LEFT SIDE OF THE FUSELAGE, THE VERTICAL STABILIZER, AND THE HORIZONTAL STABILIZER. THE FUSELAGE STRIKE CAUSED A RAPID DECOMPRESSION. THE AIRPLANE WAS LANDED WITHOUT FURTHER INCIDENT.

Probable Cause: SEPARATION OF THE AFT, UPPER, ACCESSORY CASE COWL ASSEMBLY FROM THE AIRPLANE, AND INADEQUATE AIRFRAME EQUIPMENT PROVIDED BY THE MANUFACTURER.

Accident investigation: