Piston helicopter

N4029S

1980 Hiller UH-12E

Registered 1 NTSB/FAA record
Built
1980
Serial
5129
Class
Piston helicopter
Engines
Lycoming VO-540 series
Status
Current as of October 2026
Registered owner
Slikker Flying Service Inc (Corporation)
Based
Buttonwillow, CA
Registration record

N4029S on the FAA register

Type
1980 Hiller UH-12E
Serial
5129
Engines
Lycoming VO-540 series
Registered owner
Slikker Flying Service Inc
Buttonwillow, CA
Certificate issued
2011-08-19
Airworthiness date
1980-05-02
Registration expires
2027-08-31
Airworthiness class
Restricted
Mode S (hex)
A4B7B3
Mode S (octal)
51133663
Seats (type)
4
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2027-08-31
    Registration expires (renewal due).
  • 2011-08-19
    Certificate of registration issued as N4029S to the current registrant.
  • 1997-05-29
    Accident at Granby, NY; damage: substantial.
  • 1980-05-02
    Airworthiness date on the current FAA record (restricted category).
  • 1973-03-09
    N4029S previously assigned to a Sikorsky S-65C3 (s/n 65354); cancelled.
Overview

About N4029S

N4029S is a 1980 Hiller UH-12E, serial number 5129. The FAA register lists Slikker Flying Service Inc as the registrant in Buttonwillow, California. The current certificate of registration was issued on August 19, 2011 and expires on August 31, 2027.

The FAA aircraft reference file describes the type as a piston helicopter, one Lycoming VO-540 series engine and 4 seats. Its airworthiness certificate is restricted category, dated May 2, 1980.

N4029S has 1 accident/incident record on file (most serious damage: substantial); details are below.

Safety record

Accident & incident history

1997-05-29 Accident · Granby, NY Damage: Substantial Serious injury NTSB · NYC97LA101
Reported aircraft: Hiller UH-12E
Probable cause: failure of the pilot/owner to replace the torsional clutch as specified by the manufacturer, and subsequent failure of the helicopter's clutch, which resulted in a forced landing (autorotation). A related factor was: the encounter with trees in the emergency landing area.

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

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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.