NTSB Identification: DEN82IA049
Scheduled 14 CFR Part 121: Air Carrier operation of U.S. AVIATION
Incident occurred Thursday, March 25, 1982 in DENVER, CO
Probable Cause Approval Date: 03/25/1983
Aircraft: GULFSTREAM G159-C, registration: N857H
Injuries: 20 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.

ON FINAL APPROACH AFTER A NORMAL FLIGHT, THE COPILOT BECAME INCAPACITATED WHILE READING THE FINAL APPROACH CHECKLIST. THE CAPTAIN CONTINUED THE APPROACH AND MADE AN UNEVENTFUL LANDING. AFTER THE PASSENGERS HAD DEPLANED, THE COPILOT SUFFERED A SEIZURE WHILE HE WAS BEING HELPED DOWN THE STEPS BY THE CAPTAIN AND THE FLIGHT ATTENDANT. HE WAS TRANSPORTED TO THE HOSPITAL WHERE TESTS DETERMINED THAT HE HAD A CALCIUM DEPOSIT BEHIND THE RIGHT EAR THAT WAS APPLYING PRESSURE TO THE BRAIN. A CHEMOTHERAPY PROGRAM EVENTUALLY RESOLVED THE PROBLEM. THE COPILOT HAD RECEIVED HIS LAST CLASS I MEDICAL EXAMINATION TWO MONTHS PRIOR TO THE INCIDENT.

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

INCAPACITATION..COPILOT/SECOND PILOT

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