Incident Description
While cruising at flight level 350, shortly before initiating descent to John F. Kennedy International Airport (JFK), the flightcrew observed illumination of the No. 2 engine generator warning light and the constant speed drive (CSD) low oil pressure light. Attempts to disconnect the CSD were unsuccessful. The No. 2 engine was subsequently shut down.
Following the shutdown, the No. 2 engine fire warning activated. The flightcrew discharged both No. 2 engine fire bottles, but the fire persisted.
Emergency Landing and Firefighting
The flightcrew declared an emergency and landed at JFK without further incident. Upon arrival, firefighters noted that the gearbox was glowing red. They applied extinguishing agent to the area.
Examination Findings
Post-incident examination of the engine and accessory gearbox components revealed that the CSD had failed to disconnect. The failure was attributed to the CSD not having been overhauled in accordance with the manufacturer's overhaul manual.