The U.S. aircraft register, updated daily
Deregistered · FAA record as of October 2, 2026
N598S

N598S is not currently registered. It was last assigned to a Sikorsky S-58DT built in 1960. The FAA cancelled the registration on May 4, 2004. The last status on file was "triennial registration form was mailed and has not been returned by the post office".

Sikorsky S-58DT cancelled May 4, 2004

Serial number
58-1196
Type
Rotorcraft · Turboshaft
Year built
1960
Last status
Triennial registration form was mailed and has not been returned by the Post Office
Certificate issued
October 24, 2000
Last FAA action
December 19, 2006
Last owner
Mcmahon Helicopter Services INC (Corporation)
Canton, MI
Airworthiness
Standard · Transport

NTSB accident and incident record under N598S

CHI04LA047Accident on December 22, 2003 at Ypsilanti, MI: minor injuries, destroyed.

Aircraft on the NTSB record: Sikorsky S-58JT · serial 58-1196

The pilot became disoriented and attempted to land the helicopter at the wrong ramp resulting in his failure to maintain obstacle clearance during the approach. The light poles were a factor to the accident.

A tail number passes between aircraft over the years; match the serial number on the NTSB record against the airframe above. Source: NTSB aviation accident database, records through September 30, 2026.

Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 2, 2026. See this number on the FAA site