Type Record · As of May 3, 2026
HILLER UH-12
Rotorcraft · LYCOMING VO-540 SERIES
Registered
2
Year Range
1949–1961
NTSB Events
0
Airworthiness Directives
4
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered HILLER UH-12 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- ID 50.0% 1
- NV 50.0% 1
By Decade of Manufacture
- 1940s 50.0% 1
- 1960s 50.0% 1
02 / NTSB Records
Events involving HILLER UH-12 aircraft
No NTSB-recorded events match HILLER UH-12 in the indexed corpus.
03 / Airworthiness Directives
FAA directives applicable to HILLER UH-12
4 directive(s) on file. Showing the most recent 4.
-
Dec 4, 2001
Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company) 250-C20 Series Turboshaft and 250-B17 Series Turboprop Engines
This amendment supersedes an emergency airworthiness directive (AD) that was sent previously to all known U.S. owners and operators of Rolls-Royce Corporation (formerly Allison Engine Company) models 250- C20, -C20B, -C20F, -C20R, -C20R/1, -C20R/2, -C20S, and -C20W turboshaft engines, and 250-B17, -B17C, -B17D, -B17E,…
-
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…
-
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…
-
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…
04 / Type Certificate Data Sheets
FAA TCDS for HILLER UH-12
The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.
- 6H1 Historical Rev 12 · 10/28/2014
Siam Hiller Holdings Inc.
Models: UH-12, UH-12A
06 / Supplemental Type Certificates
Modifications approved for HILLER UH-12
60 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
-
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
-
12/29/2016
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
-
01/14/2015
STC SR02394AK
Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system
Seaplanes North LLC
-
06/09/2014
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
-
07/25/2013
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
-
10/17/2012
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
-
05/23/2012
STC SR02394AK
Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system
Floats Alaska LLC
-
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
-
02/21/2012
STC SH3319NM
Installation of Precise Pulselite Control System
Precise Flight Inc
-
10/20/2010
STC SA00068SE (PAGE 1)
Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1)
Electronics International Inc.
-
12/10/2009
STC SA2693NM (PAGE 1)
Installation of Electronics International digital volt/amp gauges and accessories.
Electronics International Inc.
-
02/10/2009
STC SA593CH (Page 1)
Install Champion SlickSTART magneto booster system.
Champion Aerospace LLC
-
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
-
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
-
04/02/2006
STC SA01240SE (1 OF 5)
Installation of secondary voltage indication system
Visual Instruments LLC
-
03/29/2006
STC SA02268CH (PAGE 3)
Installation of Airwolf Filter Corp. Air Oil Separator
Airwolf Filter Corporation
-
07/08/2005
STC SA00680SE (5 OF 6
Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.
Electronics International
-
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
-
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
-
01/24/2005
STC SA2693NM
Installation of Electronics International digital volt/amp gauges and accessories.
Electronics International Inc.
-
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
-
03/12/2004
STC SA593CH (2 OF 5)
Install Champion SlickSTART magneto booster system.
Champion Aerospace LLC
-
11/07/2003
STC SH3319NM
Installation of Precise Pulselite Control Unit in the Landing/Taxi/Recognition Visual Control Light System.
Precise Flight Inc
-
05/30/2002
STC SA02520AT
Installation of M-20 Oil Separator, model 600-WP.
M-20 Oil Separators LLC
-
12/03/2001
STC SH3319NM
Installation of Precise Pulselite Control Unit in the Landing/Taxi/Recognition Visual Control Light System.
Precise Flight Inc
-
10/25/2000
STC SA2687NM (PAGE 1)
Installation of Truboplus/ Electronics Int'l gauges and switches.
Aero Manufacturing Inc.
-
03/09/1999
STC SA00680SE (5 OF 6
Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.
Electronics International
-
03/09/1993
STC SA1626NM Page 1
Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)
Electronics International
-
02/24/1992
STC SA2687NM
Installation of Truboplus/ Electronics Int'l gauges and switches.
ACD Corporation
+ 30 more STCs on file
07 / PMA replacement parts
FAA-approved replacement parts for HILLER UH-12
8 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.
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AA-36101-1#https://drs.faa.gov/browse/excelExternalWindow/617B67CD1B8FAD7B8625809E006170B6.0001##
Cuff Assembly, Control Rotor
Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 36101-1
PMA holder → -
AA-31389#https://drs.faa.gov/browse/excelExternalWindow/71A13B988591437E8625809E0061703E.0001##
Arm, Collective Pitch Incidence
Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 31389
PMA holder → -
MDL TD 031851#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165624220220250508133547.0001##
VA-1A( )AndAccessories
Electronics International Inc replaces Modification Part
PMA holder → -
01-0790906-00#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153236874920220610124308.0001##
LED Landing Light
LoPresti Speed Merchants replaces Modification Part
PMA holder → -
P-UH-12E-7, -8,-9, -10, -11, -12#https://drs.faa.gov/browse/excelExternalWindow/1D9BFB84CE86CA8E8625734D00570257.0001##
Replacement Bubble Assy Chin
Nordam Group Inc, Transparency Division, The replaces Hiller Aviation64004-112, -113, -123
PMA holder → -
P-UH-12E-4, -5, -6#https://drs.faa.gov/browse/excelExternalWindow/0A5203106752046D8625734D00570237.0001##
Replacement Bubble Assy
Nordam Group Inc, Transparency Division, The replaces Hiller Aviation 64004-111, -121
PMA holder → -
P-UH-12E-13, -14, -15, -16, -17, -18, -25, -27, -29#https://drs.faa.gov/browse/excelExternalWindow/BA4770EFCE3899428625734D00570277.0001##
Window Assy Door
Nordam Group Inc, Transparency Division, The replaces Hiller Aviation 64090-4, -5, -6, -7 64168-11, -13, -17, -19 64093-1, -3 64169-5, -7, -11, -13 64153-17, -23
PMA holder → -
P-UH-12E-1, -2, -3#https://drs.faa.gov/browse/excelExternalWindow/0857C05EF9CD68028625734D00570218.0001##
Replacement Bubble Assy
Nordam Group Inc, Transparency Division, The replaces Hiller Aviation64004-120, -129
PMA holder →
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for HILLER UH-12
Advisory Circulars
ACs whose subject explicitly mentions HILLER or UH-12.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 2 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.
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →