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Type Record · As of May 3, 2026

HILLER UH-12C

Rotorcraft · FRANKLIN 6A&6V335 SER

Registered

30

Year Range

1955–1959

NTSB Events

27

Airworthiness Directives

5

Aircraft Resources

Engine · Franklin Engine Corp (PZL-Aero) → Search FAA TCDS →

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered HILLER UH-12C aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • TX 33.3% 10
  • OR 10.0% 3
  • FL 6.7% 2
  • PA 6.7% 2
  • WY 6.7% 2
  • NV 6.7% 2
  • MN 3.3% 1
  • GA 3.3% 1
  • AL 3.3% 1
  • NY 3.3% 1

+5 more states

By Decade of Manufacture

  • 1950s 76.7% 23
  • Unknown 23.3% 7

02 /  NTSB Records

Events involving HILLER UH-12C aircraft

27 event(s) on file. Showing the most recent 25 · 2 more available on NTSB CAROL.

03 /  Airworthiness Directives

FAA directives applicable to HILLER UH-12C

5 directive(s) on file. Showing the most recent 5.

  • Dec 6, 2000

    Airworthiness Directives; Siam Hiller Holdings, Inc. Model UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, UH-12E-L, UH-12L, and UH-12L4 Helicopters

    This amendment adopts a new airworthiness directive (AD), for Siam Hiller Holdings, Inc. (Hiller), formerly Rogerson Hiller Corporation, Model UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, UH- 12E-L, UH-12L, and UH-12L4 helicopters, that requires replacing all undrilled-shank bolts at pivoting joints in the control s…

    Atlas AD → Federal Register ↗

  • Aug 31, 2000

    Airworthiness Directives; Siam Hiller Holdings, Inc. Model UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, UH-12E-L, UH-12L, and UH-12L4 Helicopters

    This document proposes the adoption of a new airworthiness directive (AD) for Siam Hiller Holdings, Inc. (Hiller), formerly Rogerson Hiller Corporation, Model UH-12, UH-12A, UH-12B, UH-12C, UH- 12D, UH-12E, UH-12E-l, UH-12L, and UH-12L4 helicopters. The AD would require replacing all undrilled-shank bolts at pivoting…

    Atlas AD → Federal Register ↗

  • Oct 8, 1997

    Airworthiness Directives; Hiller Aircraft Corporation Model UH- 12A, UH-12B, UH-12C, UH-12D, and UH-12E Helicopters

    This amendment supersedes an existing airworthiness directive (AD), applicable to Hiller Aircraft Corporation Model UH-12A, UH-12B, UH-12C, UH-12D, and UH-12E helicopters, that currently requires a dye penetrant inspection of the head of the main rotor outboard tension- torsion (T-T) bar pin for cracks; a visual inspe…

    Atlas AD → Federal Register ↗

  • May 23, 1997

    Airworthiness Directives; Hiller Aircraft Corporation Model UH- 12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, CH-112, H-23A, H-23B, H- 23C, H-23D, H-23F, HTE-1, HTE-2, and OH-23G Helicopters

    This amendment supersedes an existing airworthiness directive (AD), applicable to Hiller Aircraft Corporation Model UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, CH-112, H-23A, H-23B, H-23C, H-23D, H- 23F, HTE-1, HTE-2, and OH-23G helicopters, and UH-12D and UH-12E helicopters converted to turbine engine power in acc…

    Atlas AD → Federal Register ↗

  • Jun 8, 1995

    Airworthiness Directives; Hiller Aircraft Corporation Model UH- 12A, UH-12B, UH-12C, UH-12D, and UH-12E Helicopters

    This amendment adopts a new airworthiness directive (AD) that is applicable to Hiller Aircraft Corporation (Hiller) Model UH-12A, UH- 12B, UH- [[Page 30185]] 12C, UH-12D, and UH-12E helicopters. This action requires a dye-penetrant inspection of the head of the main rotor outboard tension-torsion (T-T) bar pin for cra…

    Atlas AD → Federal Register ↗

04 /  Type Certificate Data Sheets

FAA TCDS for HILLER UH-12C

The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.

06 /  Supplemental Type Certificates

Modifications approved for HILLER UH-12C

40 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.

  • 04/14/2023

    STC SH3319NM

    Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 05/19/2020

    STC SH3319NM (1 OF 2)

    Installation of Precise Flight Pulselite Control Unit in the\nLanding /Taxi Recognition Visual Control Light system,

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 12/29/2016

    STC SH3319NM

    Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 01/14/2015

    STC SR02394AK

    Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system

    Seaplanes North LLC

    Atlas STC → DRS ↗

  • 06/09/2014

    STC SH3319NM

    Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 07/25/2013

    STC SH3319NM

    Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 10/17/2012

    STC SH3319NM

    Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 05/23/2012

    STC SR02394AK

    Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system

    Floats Alaska LLC

    Atlas STC → DRS ↗

  • 03/15/2012

    STC SR02394AK

    Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system per Installation Instructions LED03-20R, Rev. IR, dated October 27, 2010.

    Floats Alaska LLC

    Atlas STC → DRS ↗

  • 02/21/2012

    STC SH3319NM

    Installation of Precise Pulselite Control System

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 10/20/2010

    STC SA00068SE (PAGE 1)

    Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1)

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 12/10/2009

    STC SA2693NM (PAGE 1)

    Installation of Electronics International digital volt/amp gauges and accessories.

    Electronics International Inc.

    Atlas STC → DRS ↗

  • 06/26/2009

    STC SA01734SE (PG 2)

    Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts.

    Stewart Thomas D. and Stewart Dan R.

    Atlas STC → DRS ↗

  • 02/10/2009

    STC SA593CH (Page 1)

    Install Champion SlickSTART magneto booster system.

    Champion Aerospace LLC

    Atlas STC → DRS ↗

  • 07/24/2008

    STC SA02033AT (PAGE 5)

    Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW)

    M-20 Oil Separators LLC

    Atlas STC → DRS ↗

  • 04/10/2006

    STC SA02033AT (PAGE 1)

    Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW)

    M-20 Oil Separators LLC

    Atlas STC → DRS ↗

  • 04/02/2006

    STC SA01240SE (1 OF 5)

    Installation of secondary voltage indication system

    Visual Instruments LLC

    Atlas STC → DRS ↗

  • 03/29/2006

    STC SA02268CH (PAGE 3)

    Installation of Airwolf Filter Corp. Air Oil Separator

    Airwolf Filter Corporation

    Atlas STC → DRS ↗

  • 07/08/2005

    STC SA00680SE (5 OF 6

    Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.

    Electronics International

    Atlas STC → DRS ↗

  • 06/29/2005

    STC SA02033AT (PAGE 1)

    Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW)

    M-20 Oil Separators LLC

    Atlas STC → DRS ↗

  • 05/17/2005

    STC SA02033AT (PAGE 1)

    Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW)

    M-20 Oil Separators LLC

    Atlas STC → DRS ↗

  • 11/04/2004

    STC SA02033AT (PAGE 3)

    Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW)

    M-20 Oil Separators LLC

    Atlas STC → DRS ↗

  • 03/12/2004

    STC SA593CH (2 OF 5)

    Install Champion SlickSTART magneto booster system.

    Champion Aerospace LLC

    Atlas STC → DRS ↗

  • 11/07/2003

    STC SH3319NM

    Installation of Precise Pulselite Control Unit in the Landing/Taxi/Recognition Visual Control Light System.

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 05/30/2002

    STC SA02520AT

    Installation of M-20 Oil Separator, model 600-WP.

    M-20 Oil Separators LLC

    Atlas STC → DRS ↗

  • 12/03/2001

    STC SH3319NM

    Installation of Precise Pulselite Control Unit in the Landing/Taxi/Recognition Visual Control Light System.

    Precise Flight Inc

    Atlas STC → DRS ↗

  • 10/25/2000

    STC SA2687NM (PAGE 1)

    Installation of Truboplus/ Electronics Int'l gauges and switches.

    Aero Manufacturing Inc.

    Atlas STC → DRS ↗

  • 03/09/1999

    STC SA00680SE (5 OF 6

    Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.

    Electronics International

    Atlas STC → DRS ↗

  • 03/09/1993

    STC SA1626NM Page 1

    Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)

    Electronics International

    Atlas STC → DRS ↗

  • 06/06/1990

    STC SA2350NM Page 1

    Installation of Electronics International Inc digital carburetor/outside air temperature gauges

    Electronics International

    Atlas STC → DRS ↗

+ 10 more STCs on file

07 /  PMA replacement parts

FAA-approved replacement parts for HILLER UH-12C

9 parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.

  • AA-52110-3#https://drs.faa.gov/browse/excelExternalWindow/CDD4F24CD23D5A38862581A1006681BC.0001##

    Fork - Main Rotor Blade Root

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 52110-3

    PMA holder →

  • AA-51446#https://drs.faa.gov/browse/excelExternalWindow/E52CE1EE1DCBF27B8625809E006199C7.0001##

    Bushing, Main Rotor Hub

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 51446

    PMA holder →

  • AA-36126#https://drs.faa.gov/browse/excelExternalWindow/6FEC9A8C75DEBA8B8625809E00618179.0001##

    Cup, Seal, Control Rotor Hub

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 36126

    PMA holder →

  • AA-24571#https://drs.faa.gov/browse/excelExternalWindow/2CC76FDA7E8937208625809E00617DBF.0001##

    Retainer - Cardan Joint - Bearing

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 24571

    PMA holder →

  • AA-24576#https://drs.faa.gov/browse/excelExternalWindow/402C60FE92C2B8568625809E00617EA5.0001##

    Ring - Cardan Joint, Lock

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 24576

    PMA holder →

  • AA-24575#https://drs.faa.gov/browse/excelExternalWindow/44F81EDBB50C5E068625809E00617E32.0001##

    Housing, Tail Rotor Drive, Cardan Joint

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 24575

    PMA holder →

  • AA-43031#https://drs.faa.gov/browse/excelExternalWindow/0A1C0D4D23E84A828625809E006173FE.0001##

    Spring Tube Assy, Skid Gear - Front

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 43031

    PMA holder →

  • AA-36101-3#https://drs.faa.gov/browse/excelExternalWindow/F76DDAA9D298923D8625809E0061712B.0001##

    Cuff Assembly, Control Rotor

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 36101-3

    PMA holder →

  • AA-31114-1#https://drs.faa.gov/browse/excelExternalWindow/BD77568A1A359A2D8625809E00616FB6.0001##

    Arm - Collective Pitch Blade Incidence

    Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 31114-1

    PMA holder →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for HILLER UH-12C

Advisory Circulars

ACs whose subject explicitly mentions HILLER or UH-12C.

05 /  Aircraft of this type

All 30 registered N-numbers

Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.

30 of 30
N-number St Year NTSB FAA
N103JA FL — · Look up ↗
N10728 OR 1956 · Look up ↗
N112BK OR 1957 · Look up ↗
N1348X TX 1957 · Look up ↗
N1348Z TX 1958 ● Look up ↗
N156PT MN 1956 · Look up ↗
N17MQ PA — · Look up ↗
N222TE TX 1955 ● Look up ↗
N239SB OR 1956 · Look up ↗
N26US GA 1957 · Look up ↗
N38767 TX — ● Look up ↗
N469DW TX 1956 · Look up ↗
N49983 TX — ● Look up ↗
N5315V WY 1956 ● Look up ↗
N5317V NV 1956 ● Look up ↗
N5320V AL 1956 ● Look up ↗
N5321V TX 1956 ● Look up ↗
N5326V WY 1956 ● Look up ↗
N5330V FL 1959 ● Look up ↗
N54594 NY — ● Look up ↗
N57CD IA 1957 · Look up ↗
N57FD TX — ● Look up ↗
N57PD PA 1956 · Look up ↗
N780C NV 1956 · Look up ↗
N783TT TX 1956 · Look up ↗
N9010Q TX 1955 · Look up ↗
N90724 DC — · Look up ↗
N9734C TN 1956 ● Look up ↗
N9739C DE 1956 ● Look up ↗
N9774C WA 1958 · Look up ↗

Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)

05 /  Sources & Methodology

Every count traces back to a primary US-government source

We render counts and lists as the agency publishes them. Read the methodology →