Type Record · As of May 3, 2026
HILLER UH-12A
Rotorcraft · FRANKLIN 6A&6V335 SER
Registered
16
Year Range
1949–1962
NTSB Events
14
Airworthiness Directives
5
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered HILLER UH-12A aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- FL 12.5% 2
- TX 12.5% 2
- OK 12.5% 2
- CA 6.3% 1
- NV 6.3% 1
- VA 6.3% 1
- MI 6.3% 1
- DE 6.3% 1
- NH 6.3% 1
- SD 6.3% 1
+3 more states
By Decade of Manufacture
- 1940s 12.5% 2
- 1950s 25.0% 4
- 1960s 6.3% 1
- Unknown 56.3% 9
02 / NTSB Records
Events involving HILLER UH-12A aircraft
14 event(s) on file. Showing the most recent 14.
-
Aug 27, 2023
N8178HMosby, Missouri
NTSB Docket → -
Jun 29, 2013
N6331DFlorence, Alabama Serious
NTSB Docket → -
Feb 24, 2007
N8180HBethlehem, Georgia Fatal
NTSB Docket → -
Sep 11, 1999
N212WSATARTIA, Mississippi Minor
NTSB Docket → -
Sep 16, 1995
N8180HBONNERS FERRY, Idaho
NTSB Docket → -
Oct 8, 1978
N330MMUSKEGON, Michigan
NTSB Docket → -
Dec 16, 1975
N57USAN DIEGO, California
NTSB Docket → -
Dec 13, 1975
N8117HADA, Oklahoma
NTSB Docket → -
Jun 11, 1971
N8178HBROOKS, Oregon Fatal
NTSB Docket → -
Jul 11, 1970
N8180HMAUPIN, Oregon
NTSB Docket → -
Jun 14, 1967
N8180HFAIRBANKS, Alaska
NTSB Docket → -
Oct 13, 1966
N8109HHONESDALE, Pennsylvania
NTSB Docket → -
Jun 6, 1966
N263SSLOS ANGELES, California
NTSB Docket → -
Mar 4, 1964
N162MVAN NUYS, California Unknown
NTSB Docket →
03 / Airworthiness Directives
FAA directives applicable to HILLER UH-12A
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…
-
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…
-
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…
-
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…
-
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…
04 / Type Certificate Data Sheets
FAA TCDS for HILLER UH-12A
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-12A
36 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
-
11/13/2014
STC SH276WE
Installation of UH-12C Upper Canopy
Heck Research 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
-
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
-
06/08/1994
STC SH276WE
Installation of UH-12C upper canopy.
Penland Helicopter Repair, Inc
-
03/09/1993
STC SA1626NM Page 1
Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)
Electronics International
+ 6 more STCs on file
07 / PMA replacement parts
FAA-approved replacement parts for HILLER UH-12A
2 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-51407-1#https://drs.faa.gov/browse/excelExternalWindow/035EF83D5C8365528625809E00619733.0001##
Plate Set, Main Rotor Tension -Torsion
Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 51407-1
PMA holder → -
AA-24582#https://drs.faa.gov/browse/excelExternalWindow/D145CB8472783CE48625809E00617F1C.0001##
Ring, Tail Rotor Univ. Joint Snap
Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces 24582
PMA holder →
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for HILLER UH-12A
Advisory Circulars
ACs whose subject explicitly mentions HILLER or UH-12A.
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 16 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.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N162DL | FL | — | · | Look up ↗ |
| N162M | CA | 1962 | ● | Look up ↗ |
| N212W | NV | — | ● | Look up ↗ |
| N263SS | TX | — | ● | Look up ↗ |
| N330M | VA | — | ● | Look up ↗ |
| N4254A | MI | 1950 | · | Look up ↗ |
| N4733C | DE | — | · | Look up ↗ |
| N4977E | NH | 1951 | · | Look up ↗ |
| N57U | SD | — | ● | Look up ↗ |
| N613HL | OK | — | · | Look up ↗ |
| N6331D | OK | — | ● | Look up ↗ |
| N69085 | NY | — | · | Look up ↗ |
| N8109H | FL | 1949 | ● | Look up ↗ |
| N8117H | LA | 1949 | ● | Look up ↗ |
| N8178H | MO | 1950 | ● | Look up ↗ |
| N8180H | TX | 1950 | ● | 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
- 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 →