Piston helicopter

N1255T

1954 Sikorsky S55B

Registered 1 NTSB/FAA record
Built
1954
Serial
55607
Class
Piston helicopter
Engines
Airesearch TSE331 series
Status
Current as of October 2026
Registered owner
Sierra Aeronautics LLC (LLC)
Based
Franklin, KY
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Registration record

N1255T on the FAA register

Type
1954 Sikorsky S55B
Serial
55607
Engines
Airesearch TSE331 series
Registered owner
Sierra Aeronautics LLC
Franklin, KY
Certificate issued
2021-09-21
Airworthiness date
1975-03-19
Registration expires
2028-09-30
Airworthiness class
Standard · normal
Mode S (hex)
A0695E
Mode S (octal)
50064536
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 N1255T.
  • 2009-07-24
    Accident at Chelan, WA; damage: substantial.
  • 1975-03-19
    Airworthiness date on the current FAA record (standard category (normal)).
  • 1954
    Manufactured (1954).
Overview

About N1255T

N1255T is a 1954 Sikorsky S55B, serial number 55607. 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 piston helicopter, one Airesearch TSE331 series engine and 12 seats. Its airworthiness certificate is standard category (normal), dated March 19, 1975.

N1255T has 1 accident/incident record on file (most serious damage: substantial); details are below.

Safety record

Accident & incident history

2009-07-24 Accident · Chelan, WA Damage: Substantial NTSB · WPR09LA371
Reported aircraft: Sikorsky S-55
Probable cause: Failure of a seal in the hydraulic system resulting in a loss of hydraulic pressure while maneuvering at low altitude.

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.