BOEING-VERTOL 234

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered BOEING-VERTOL 234 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

02 /  NTSB Records

Events involving BOEING-VERTOL 234 aircraft

1 event(s) on file. Showing the most recent 1.

• Aug 22, 2008

  N239CH

  Burns, Oregon

  NTSB Docket →

02c /  Academic Research

Scholarly work mentioning BOEING-VERTOL 234

Papers and reports across NASA, NTSB, FAA CAMI, AOPA ASI, Embry-Riddle, arXiv, and the broader academic graph that mention this airframe. Title or keyword match — drill into each for full abstract + author list + PDF link.

• Embry-Riddle Scholarly Commons 2017 · Conference paper

  Age Differences in Helicopter Accidents: A Preliminary Investigation

  This study utilized the NTSB database from 2006 to 2016 to examine differences in severity of accidents by age for helicopter operations.

Browse the full corpus — academia portal ↗

03 /  Airworthiness Directives

FAA directives applicable to BOEING-VERTOL 234

No matching airworthiness directives are on file for this make and model in the Federal Register.

04 /  Type Certificate Data Sheets

FAA TCDS for BOEING-VERTOL 234

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

• H9EA Historical Rev 3 · 12/15/2006

  Boeing Defense & Space Group

  Models: 234

  Atlas TCDS → DRS ↗

06 /  Supplemental Type Certificates

Modifications approved for BOEING-VERTOL 234

27 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 ↗

• 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 ↗

• 02/21/2012

  STC SH3319NM

  Installation of Precise Pulselite Control System

  Precise Flight Inc

  Atlas STC → DRS ↗

• 01/04/2007

  STC SH2928NM

  Installation of an improved engine electrical wiring harness on Boeing Vertol 234 with Lycoming AL5512 engines

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 05/09/2006

  STC SR01674SE

  Fabrication of Columbia Helicopters, Inc. (CHI) Support Assembly, part number C34D6001-9.

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 03/17/2004

  STC SR01392SE

  Fabrication and Installation of "Provisional Hardpoints" per Columbia Helicopter Master Drawing List, Document No. 04-RDE-0208, revision B, dated March 17, 2004, or later FAA appro…

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 02/25/2004

  STC SR00811NY

  Installation of Technisonic Industries Limited TFM-138 series transceiver models.

  Technisonic Industries Limited

  Atlas STC → DRS ↗

• 11/26/2003

  STC SR01834NY

  Installation of Globalstar Satellite Telephone System.

  Atlantic Avionics Inc.

  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 ↗

• 08/08/2003

  STC SR00811NY

  Installation of Technisonic Industries Limited TFM-138 series transceiver models.

  Technisonic Industries Limited

  Atlas STC → DRS ↗

• 06/20/2003

  STC SH2720SO

  Installation of Aero Aire Model 234 Environmental Control System (ECS) in accordance with Aero Aire Master Drawing List Document No. A234R002, Revision B, dated March 7, 1990, or l…

  Enviro Systems Inc.

  Atlas STC → DRS ↗

• 01/29/2003

  STC SR00811NY

  Installation of Technisonic Industries Limited TFM-138 series transceiver models.

  Technisonic Industries Limited

  Atlas STC → DRS ↗

• 10/21/2002

  STC SR00811NY

  Installation of Technisonic Industries Limited TFM-138 series transceiver models.

  Technisonic Industries Limited

  Atlas STC → DRS ↗

• 01/24/2002

  STC SR01041SE

  Modification and installation of the Columbia Helicopters, Inc. C34E2057 Utility Interior Configuration, 1-19 Passengers, in accordance with Columbia Helicopters, Inc. (CHI) Master…

  Columbia Helicopters Inc

  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 ↗

• 08/17/2001

  STC SR00956SE

  Installation of offset cyclic and collective control sticks in accordance with McClenahan Engineering Master Drawing List No. DM0118-3, Revision A, dated July 13, 2001, or later FA…

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 08/17/2001

  STC SR00955SE

  Replacement of the pilot and co-pilot cockpit doors with bubble doors in accordance with McClenahan Engineering Master Drawing List No. DM0116-3, dated June 2, 2001, or later FAA a…

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 02/16/2001

  STC SR00875SE

  Installation of Honeywell Solid State Flight Data Recorder (SSFDR) and Teledyne Digital Flight Data Acquisition Unit (DFDAU) per Columbia Helicopters, Inc., Master Drawing List 99-…

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 03/06/1996

  STC SR00288SE

  Modification of internal auxiliary fuel tank from a dry-cell type to a wet-cell type.

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 07/16/1993

  STC SH5973NM

  Approve increased altitude and weight capability when operated in Category And B operations.

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 10/15/1992

  STC SH5685NM

  Installation of an improved N2 control system.

  Columbia Helicopters Inc

  Atlas STC → DRS ↗

• 09/22/1992

  STC SH5762NM

  Installation of Advanced Technology Aircraft Co. engine barrier filter.

  Advanced Technology Aircraft Company

  Atlas STC → DRS ↗

• 03/15/1990

  STC SH2720SO

  Installation of Aero Aire Model 234 environmental control system (ECS).

  Aero Aire Corporation

  Atlas STC → DRS ↗

07 /  PMA replacement parts

FAA-approved replacement parts for BOEING-VERTOL 234

14 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.

• 31-75101-3214-4#https://drs.faa.gov/browse/excelExternalWindow/97EBF5EF139BCFB98625848D005DDD11.0001##

  Scavenge Pump, Right Hand Ref Model 1106-5

  Parker Hannifin Corp replaces 414DS222-5

  PMA holder →

• 31-75101-3215-4#https://drs.faa.gov/browse/excelExternalWindow/F0131B5A0C5D87918625848D005DDD30.0001##

  Scavenge Pump, Left Hand Ref Model 1106-6

  Parker Hannifin Corp replaces 414DS222-6

  PMA holder →

• AC7031F897#https://drs.faa.gov/browse/excelExternalWindow/28E572A836F80A8186257A610055E83D.0001##

  Hydraulic Filter Element

  Pall Aeropower Corporation replaces AC-7031F-897

  PMA holder →

• AE48251211Y1#https://drs.faa.gov/browse/excelExternalWindow/B9F28D43351DEF9986257A610055E839.0001##

  Hydraulic Return Line Filter Assembly

  Pall Aeropower Corporation replaces 414HS135-1

  PMA holder →

• AE4825161Y4#https://drs.faa.gov/browse/excelExternalWindow/F944035B1442DC0286257A610055E83A.0001##

  Single Stage Hydraulic Filter

  Pall Aeropower Corporation replaces 414HS135-2

  PMA holder →

• AC766565#https://drs.faa.gov/browse/excelExternalWindow/2B982DB47CFDE45E86257A610055E84D.0001##

  Filter Element

  Pall Aeropower Corporation replaces 414HS120-2

  PMA holder →

• AC7665F45#https://drs.faa.gov/browse/excelExternalWindow/27C33441D4C28C7E86257A610055E84B.0001##

  Filter Element

  Pall Aeropower Corporation replaces 414HS120-1

  PMA holder →

• ACA671F5#https://drs.faa.gov/browse/excelExternalWindow/371BF4E1C623BAC786257A010056FF9D.0001##

  Element Assembly

  Pall Aeropower Corporation replaces 145DS514-5

  PMA holder →

• 114R2139-2AS#https://drs.faa.gov/browse/excelExternalWindow/A6612DF2D7B844D5862570740056E83F.0001##

  Plain Encased Seal

  Aerospace Sealants, LLC replaces Boeing Defense & Space Group P/N: 510863 (SCD 114R2139-2)

  PMA holder →

• 114RS212-2AS#https://drs.faa.gov/browse/excelExternalWindow/5FECACBBE3FF528D862570740056E036.0001##

  Plain Encased Seal

  Aerospace Sealants, LLC replaces Boeing Defense & Space Group P/N 520253 (SCD 114RS212-1)

  PMA holder →

• 114R2142-3AS#https://drs.faa.gov/browse/excelExternalWindow/059CB81270209656862570740056E59D.0001##

  Plain Encased Seal

  Aerospace Sealants, LLC replaces Boeing Defense & Space Group P/N: 517868 (SCD 114R2142-3)

  PMA holder →

• 114RS212-1AS#https://drs.faa.gov/browse/excelExternalWindow/47651E62E499C1EE862570740056DD84.0001##

  Plain Encased Seal

  Aerospace Sealants, LLC replaces Boeing Defense & Space Group 520253 (SCD 114RS212-1)

  PMA holder →

• 114RS215-1AS#https://drs.faa.gov/browse/excelExternalWindow/1875695B5F781624862570740056E2D3.0001##

  Plain Encased Seal

  Aerospace Sealants, LLC replaces Boeing Defense & Space Group P/N 523519 (SCD 114RS215-1)

  PMA holder →

• 8140-1#https://drs.faa.gov/browse/excelExternalWindow/3F361EAF095B8CA3862572EB00576ACD.0001##

  O-Ring (Packing, Preformed)

  Wencor LLC replaces AA92271640D, 243

  PMA holder →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for BOEING-VERTOL 234

05 /  Aircraft of this type

All 6 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 →