Multiple · Standard, Restricted, Agriculture and Pest Control
Airworthiness date
Mar 21, 1979
We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.
Airframe & engine
FAA Registry + type data
Airframe
Manufacturer
Sikorsky
Model
S-55B
Year
1955
Serial number
55237
Aircraft type
Rotorcraft
Category
Land
Certification
Type Certificated
Seats
12
Engines
1
Max takeoff weight
Up to 12,499 lb
Type certificate data sheet
1H4
Mode S code
A2364B
Engine
Make and model
Wright C7ba Series
Type
Turbo-shaft
Power
800 hp
Total time and engine hours aren't public. They appear here once the owner adds logbooks.
Ownership history
Ownership history from FAA records
2021 – nowSierra Aeronautics LLCFranklin, KY · current
Individual owners are shown by city and state only.
Safety record
NTSB · Oct 15, 2026 · FAA ADs · Oct 20, 2026 · SDRs · Oct 16, 2026
NTSB events (1)
Accident · substantial damage
Jul 20, 1984 · Richey, MT
THE PILOT STATED THAT HE LANDED IN A PASTURE WHERE HE INTENDED TO REFUEL. DURING THE LANDING ROLL, ONE OF THE WHEELS DROPPED INTO A HOLE, CAUSING THE MAIN ROTOR BLADE TO FLEX DOWNWARD AND SEVERE THE TAILBOOM.
These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
No ADs published since 1998 matched this airframe or engine model.
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
Service Difficulty Reports (0)
No Service Difficulty Reports found for this airframe since 1995.