Turbine helicopter

N31611

1956 Sikorsky S-55B

Registered 1 NTSB/FAA record
Built
1956
Serial
56-4255
Class
Turbine helicopter
Engines
Wright C7BA series
Status
Current as of October 2026
Registered owner
Sierra Aeronautics LLC (LLC)
Based
Franklin, KY
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Registration record

N31611 on the FAA register

Type
1956 Sikorsky S-55B
Serial
56-4255
Engines
Wright C7BA series
Registered owner
Sierra Aeronautics LLC
Franklin, KY
Certificate issued
2021-09-21
Airworthiness date
1973-06-07
Registration expires
2028-09-30
Airworthiness class
Restricted
Mode S (hex)
A35FB0
Mode S (octal)
50657660
Seats (type)
12
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2028-09-30
    Registration expires (renewal due).
  • 2021-09-21
    Certificate of registration issued as N31611.
  • 1980-08-27
    Accident at Titusville,Fl, 09; damage: substantial.
  • 1973-06-07
    Airworthiness date on the current FAA record (restricted category).
  • 1956
    Manufactured (1956).
Overview

About N31611

N31611 is a 1956 Sikorsky S-55B, serial number 56-4255. The FAA register lists Sierra Aeronautics LLC as the registrant in Franklin, Kentucky. The current certificate of registration was issued on September 21, 2021 and expires on September 30, 2028.

The FAA aircraft reference file describes the type as a turbine helicopter, one Wright C7BA series engine and 12 seats. Its airworthiness certificate is restricted category, dated June 7, 1973.

N31611 has 1 accident/incident record on file (most serious damage: substantial); details are below.

Safety record

Accident & incident history

1980-08-27 Accident · Titusville,Fl, 09 Damage: Substantial NTSB · 3 2434
Reported aircraft: Sikorsky S-55B
Probable cause: UND LOOSE IN CLUTCH ASSY HOUSING.

Sources: NTSB aviation accident database and CAROL case system, FAA preliminary accident & incident notices. Search accident records

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Browse: Sikorsky aircraft for sale· Aircraft registered in Kentucky· Registry by state· FAA registry stats

Data: FAA Aircraft Registry (October 2026), including deregistered aircraft; NTSB and FAA accident data; fyiAero listing history. Individual owners' names are shown to signed-in users and street addresses are never shown. Type figures are published specifications, not this aircraft's.