Type Record · As of May 3, 2026
BOEING-VERTOL CH-21C
Rotorcraft
Registered
1
NTSB Events
0
Airworthiness Directives
0
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered BOEING-VERTOL CH-21C aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- CA 100.0% 1
By Decade of Manufacture
- Unknown 100.0% 1
02 / NTSB Records
Events involving BOEING-VERTOL CH-21C aircraft
No NTSB-recorded events match BOEING-VERTOL CH-21C in the indexed corpus.
03 / Airworthiness Directives
FAA directives applicable to BOEING-VERTOL CH-21C
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 CH-21C
The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 2 matches in the FAA catalog.
- H11WE Historical Rev 0 · 03/01/1979
Lassen Air
Models: CH-21C
- H8WE Current Rev 2 · 03/05/1979
Schneck Jack A.
Models: CH-21C
06 / Supplemental Type Certificates
Modifications approved for BOEING-VERTOL CH-21C
8 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
-
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
-
02/21/2012
STC SH3319NM
Installation of Precise Pulselite Control System
Precise Flight Inc
-
10/13/1989
STC SA4302NM (PAGE 1)
Installation of Electronics Int'l digital automatic engine analyzer.
Electronics International
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for BOEING-VERTOL CH-21C
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
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 1 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 |
|---|---|---|---|---|
| N106MH | CA | — | · | 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 →