NTSB Identification: NYC88IA141.
The docket is stored on NTSB microfiche number 38650.
Incident occurred Monday, May 16, 1988 in ALLENTOWN, PA
Probable Cause Approval Date: 06/11/1990
Aircraft: CESSNA S550, registration: N81SH
Injuries: 5 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

WHILE CRUISING AT FL350 IN LIGHT TURBULENCE, THE TRAILING HALF OF THE LEFT HAND OUTBOARD TRAILING EDGE FLAP SEPARATED FROM THE ACFT. THE PILOT DECLARED AND EMERGENCY AND LANDED AT POUGHKEEPSIE, NEW YORK, WITHOUT FURTHER INCIDENT. THE PORTION OF THE DAMAGED FLAP WHICH REMAINED ATTACHED TO THE ACFT WAS REMOVED AND INSPECTED AT THE NTSB MATERIALS LABORATORY. INSPECTION REVEALED THAT THE FLAP DRAIN/VENT HOLES WERE SEALED WITH A FILLED MATERIAL AND PAINT. THE ACFT HAD A TOTAL OF 206 HOUR OF FLIGHT TIME. AS A RESULT OF THIS INCIDENT, AN EMERGENCY AIRWORTHINESS DIRECTIVE WAS ISSUED CALLING FOR THE INSPECTION OF THE DRAIN/VENT HOLES ON THE INBOARD END OF EACH OF THE FOUR FLAP PANELS ON CESSNA S550 ACFT.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

MAINTENANCE,INSPECTION..IMPROPER..MANUFACTURER

Index for May1988 | Index of months