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Type Record · As of May 3, 2026

BELL TEXTRON INC 525

Rotorcraft

Registered

4

NTSB Events

4

Airworthiness Directives

5

01 /  Distribution

Where the fleet lives and was built

Counts of currently-registered BELL TEXTRON INC 525 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.

By State (top 10)

  • TX 100.0% 4

By Decade of Manufacture

  • Unknown 100.0% 4

02 /  NTSB Records

Events involving BELL TEXTRON INC 525 aircraft

4 event(s) on file. Showing the most recent 4.

02b /  NASA ASRS Reports

Near-miss reports involving BELL TEXTRON INC 525

NASA's voluntary, confidential reporting system surfaces what almost went wrong. 3 de-identified ASRS reports reference this airframe. Pilot-written narrative. ASRS reports are voluntary and not investigated — they represent the reporter's perspective and cannot infer prevalence.

02c /  Academic Research

Scholarly work mentioning BELL TEXTRON INC 525

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.

Browse the full corpus — academia portal ↗

03 /  Airworthiness Directives

FAA directives applicable to BELL TEXTRON INC 525

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

  • Mar 22, 2022

    Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters

    The FAA is superseding Airworthiness Directive (AD) 2020-20- 06, which applied to certain Bell Helicopter Textron Canada Limited (now Bell Textron Canada Limited) Model 429 helicopters. AD 2020-20-06 required repetitive inspections of certain cyclic and collective assembly bearings. This AD was prompted by new bellcra…

    Atlas AD → Federal Register ↗

  • Jan 14, 2022

    Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters

    The FAA proposes to supersede Airworthiness Directive (AD) 2020-20-06, which applies to certain Bell Helicopter Textron Canada Limited (now Bell Textron Canada Limited) Model 429 helicopters. AD 2020-20-06 requires repetitive inspections of certain cyclic and collective assembly bearings. Since the FAA issued AD 2020-…

    Atlas AD → Federal Register ↗

  • Sep 25, 2020

    Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

    The FAA is adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 429 helicopters. This AD requires repetitive inspections of certain cyclic and collective assembly bearings. This AD was prompted by reports that precipitation can lead to reduced effectiveness of the grease…

    Atlas AD → Federal Register ↗

  • Mar 20, 2020

    Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters

    The FAA proposes to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada Limited (BHTC) Model 429 helicopters. This proposed AD would require repetitive inspections of certain cyclic and collective assembly bearings. This proposed AD is prompted by reports that precipitation can lead to reduced…

    Atlas AD → Federal Register ↗

  • Jun 7, 2013

    Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters

    We propose to adopt a new airworthiness directive (AD) for certain Bell Model 206L-3 and 206L-4 helicopters. This proposed AD would require installing a placard beneath the engine power dual tachometer and revising the limitations section of the rotorcraft flight manual (RFM). This proposed AD is prompted by several i…

    Atlas AD → Federal Register ↗

04 /  Type Certificate Data Sheets

FAA TCDS for BELL TEXTRON INC 525

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 BELL TEXTRON INC 525

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

  • 03/30/2026

    STC SA04750NY

    Installation of the Electric Flushing Toilet and External Service Panel

    Skyway Group Inc.

    Atlas STC → DRS ↗

  • 03/25/2026

    STC SA12345IB

    Replacement of the Halon Type 1211 portable fire extinguisher with the Halotron BrX portable fire extinguisher

    Cessna Duesseldorf Citation Service Center GmbH

    Atlas STC → DRS ↗

  • 02/03/2026

    STC SA02017WI

    The Installation of the Parker-Meggitt iPRESS™ System

    3S Certification LLC

    Atlas STC → DRS ↗

  • 01/16/2026

    STC SA12014LA

    Installation of aluminum and fiberglass wheel covers

    Premiere-Aviation Inc.

    Atlas STC → DRS ↗

  • 11/05/2025

    STC SA04619CH

    INSTALL SMARTSKY LITE SYSTEM

    Apcela IFC JV, LLC dba Apcela ATG

    Atlas STC → DRS ↗

  • 10/29/2025

    STC SA11222DS

    Installation of automatic dependent surveillance- broadcast( ADS-B) Out

    BHE & Associates Ltd.

    Atlas STC → DRS ↗

  • 10/28/2025

    STC SA11158SC

    Demonstration of aircraft tolerance to potential electromagnetic interference from certain Transmitting Potable Electronic Devices (T-PEDS)

    Liberty Partners Inc.

    Atlas STC → DRS ↗

  • 08/15/2025

    STC SA01844WI

    Installation of Garmin GFC 600 Automatic Flight Control System

    Garmin International Inc.

    Atlas STC → DRS ↗

  • 06/03/2025

    STC SA11300DS

    Upgrade previously installed Collins Aerospace Radar Altimeter

    BHE & Associates Ltd.

    Atlas STC → DRS ↗

  • 05/27/2025

    STC SA12030NY

    Installation of the position/anti-collision LED lights and LED beacon light

    Sterling Helicopter

    Atlas STC → DRS ↗

  • 04/21/2025

    STC SA11301DS

    Installation of an AirSync flight data monitoring system

    BHE & Associates Ltd.

    Atlas STC → DRS ↗

  • 03/24/2025

    STC SA09887AC

    Installation of an Avionica MK-III mini Quick Access Recorder (QAR) and optional 4G or LTE Avionica\nCellular Module (avCM

    Aircraft Systems and Manufacturing Inc.

    Atlas STC → DRS ↗

  • 01/17/2025

    STC SA11874LA

    Installation of Collins Iridium Certus Satcom

    Q.C.M. Design GmbH

    Atlas STC → DRS ↗

  • 11/07/2024

    STC SA11301DS

    Installation of an AirSync flight data monitoring system

    BHE & Associates Ltd.

    Atlas STC → DRS ↗

  • 09/20/2024

    STC SA01848WI

    Modification of a Rockwell Collins Global Positioning System (GPS)

    Rockwell Collins Inc.

    Atlas STC → DRS ↗

  • 09/13/2024

    STC SA01844WI

    Installation of Garmin GFC 600 Automatic Flight Control System

    Garmin International Inc.

    Atlas STC → DRS ↗

  • 08/27/2024

    STC SA04837NY

    Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights

    AeroLED's Holdings, LLC

    Atlas STC → DRS ↗

  • 07/18/2024

    STC SA04619CH

    INSTALL SMARTSKY LITE SYSTEM

    LIBERTY PARTNERS INC.

    Atlas STC → DRS ↗

  • 07/12/2024

    STC SA00209IB

    Installation of Single Garmin GTN 725(Xi)/GTN 750 (Xi) Unit and optional Garmin Flight Stream FS 510

    AVIONIK STRAUBING ENTWICKLUNGS GmbH

    Atlas STC → DRS ↗

  • 05/28/2024

    STC SA04051CH

    Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders

    CMD Flight Solutions LLC

    Atlas STC → DRS ↗

  • 03/05/2024

    STC SA03316CH

    Activation of an 802.11 a/b/g/n WiFi System

    Elliott Aviation Technical Products Development Inc.

    Atlas STC → DRS ↗

  • 02/02/2024

    STC SA02658SE (2 OF 2)

    Installation of Garmin GI 275 Multi-Function Display System

    Garmin International Inc.

    Atlas STC → DRS ↗

  • 09/15/2023

    STC SA11219SC

    Installation of a Rockwell Collins Pro Line Fusion ® embedded display system (EDS) with updated flight recorder data outputs for interface with the Digital Flight Data Recorder (D…

    BHE & Associates LTD

    Atlas STC → DRS ↗

  • 09/08/2023

    STC SA11158SC

    Demonstration of aircraft tolerance to potential electromagnetic interference from certain Transmitting Potable Electronic Devices (T-PEDS)

    Liberty Partners Inc.

    Atlas STC → DRS ↗

  • 06/23/2023

    STC SA01844WI

    Installation of Garmin GFC 600 Automatic Flight Control System

    Garmin International Inc.

    Atlas STC → DRS ↗

  • 06/22/2023

    STC SA00120IB

    Installation of the Universal Kapture Cockpit Voice Recorder (CVR) with Recorder Independent Power Supply (RIPS)

    Avmax Aviation Services Inc.

    Atlas STC → DRS ↗

  • 06/16/2023

    STC SA11219SC

    Installation of a Rockwell Collins Pro Line Fusion ® embedded display system (EDS) with updated flight recorder data outputs for interface with the Digital Flight Data Recorder (D…

    BHE & Associates LTD

    Atlas STC → DRS ↗

  • 03/06/2023

    STC SA02010WI

    Installation of the Mid-Continent Instruments & Avionics MD23 FLEX Custom Function Display (CFD)

    Mid-Continent Instruments and Avionics

    Atlas STC → DRS ↗

  • 03/01/2023

    STC SA10245SC

    Installation of Heads Up Technologies, Inc. XM 400 Radio Receiver and Antenna System

    Heads Up Technologies Inc.

    Atlas STC → DRS ↗

  • 01/30/2023

    STC SA00093IB

    Installation of the provisions for wireless connection of a PED/EFB to Garmin G3000 avionics via Garmin FS-510

    CESSNA DUESSELDORF CITATION

    Atlas STC → DRS ↗

+ 76 more STCs on file

07 /  PMA replacement parts

FAA-approved replacement parts for BELL TEXTRON INC 525

60+ 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.

  • HEM6519519-26#https://drs.faa.gov/browse/excelExternalWindow/E45AC4B153D9B6578625841D00571141.0001##

    Bearing

    Hemico Inc replaces 6519519-26

    PMA holder →

  • HEM6519519-26#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129852682520250307153902.0001##

    Bearing

    Hemico Inc replaces 6519519-26

    PMA holder →

  • HEM6519519-26#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID203001326202110251213430.0001##

    Bearing

    Hemico Inc replaces 6519519-26

    PMA holder →

  • 300SGL1103-8EH#https://drs.faa.gov/browse/excelExternalWindow/CF5E97FD57EEB953862582DA0071A672.0001##

    Shaft, Drive Assembly

    Seginus Inc replaces Skurka 300SGL1103-8

    PMA holder →

  • SK2222#https://drs.faa.gov/browse/excelExternalWindow/E70B92B2BB3A9597862582D300748331.0001##

    Radome Boot

    Skandia, Inc. replaces Modification Part

    PMA holder →

  • 996-0401-10#https://drs.faa.gov/browse/excelExternalWindow/A506C36B2DCDC011862581AE0077E736.0001##

    LCD DISPLAY MODULE

    Optical Display Engineering replaces 996-0401-08, 40-647-631

    PMA holder →

  • 996-0401-10#https://drs.faa.gov/browse/excelExternalWindow/14F0E5A17600F6288625818A006F01F2.0001##

    LCD DISPLAY MODULE

    Optical Display Engineering replaces 996-0401-08 40-476-631

    PMA holder →

  • 598-01-0203-049#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100575774020211209184039.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-049

    PMA holder →

  • 101-00-0000#https://drs.faa.gov/browse/excelExternalWindow/6C0C0B9CFC4B8AD1862580E90077AE11.0001##

    Cessna 525 Winglet and ATLAS Modification

    Tamarack Aerospace Group, Inc. replaces 101-00-0000

    PMA holder →

  • 101-00-0000#https://drs.faa.gov/browse/excelExternalWindow/EF5834E62BFAA1D086258570004DBB13.0001##

    Cessna525 Winglet ATLAS Modification

    Tamarack Aerospace Group, Inc. replaces 101-00-0000

    PMA holder →

  • 810-0315-362#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID492690487920210723191116.0001##

    Data Link Communication Application (DLCA_6500)

    Rockwell Collins Inc. replaces 810-0315-362

    PMA holder →

  • APS93-909-1#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127254395420250131173807.0001##

    Wear Pad

    Aviation Products Systems Inc replaces 93-909-1

    PMA holder →

  • 1201-4000-01#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134353505620240509162212.0001##

    L/R Deviation Converter

    JETTECH, LLC replaces Modification Article

    PMA holder →

  • APS170-231#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150949029420240223153720.0001##

    Insert

    Aviation Products Systems Inc replaces 170-231

    PMA holder →

  • 1201-4000-01#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID187821919420220511224722.0001##

    L/R Deviation Converter

    JETTECH LLC replaces Modification Part

    PMA holder →

  • 598-01-0205-005#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID990322544220211209184108.0001##

    GPS #2 Harness

    B/E Aerospace Inc replaces 598-01-0205-005

    PMA holder →

  • 598-01-0203-073#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID815004520220211209184048.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-073

    PMA holder →

  • 598-01-0206-015#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID912648979320211209184115.0001##

    3rd VHF Comm Harness

    B/E Aerospace Inc replaces 598-01-0206-015

    PMA holder →

  • 598-01-0203-103#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID980345962020211209184100.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-103

    PMA holder →

  • 598-01-0011-001#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID233819358420211209184126.0001##

    Installation-No. 2 GPS

    B/E Aerospace Inc replaces 598-01-0011-001

    PMA holder →

  • 598-01-0203-061#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID381898768120211209184044.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-061

    PMA holder →

  • 598-01-0208-001#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID867288282820211209184120.0001##

    DBU Harness

    B/E Aerospace Inc replaces 598-01-0208-001

    PMA holder →

  • 598-01-0203-093#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID878350625320211209184056.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-093

    PMA holder →

  • 598-01-0203-097#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID265687133420211209184058.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-097

    PMA holder →

  • 598-01-0203-051#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID727763048720211209184040.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-051

    PMA holder →

  • 598-01-0203-003#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153321924120211209184020.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-003

    PMA holder →

  • 598-01-0203-071#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID865785033120211209184048.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-071

    PMA holder →

  • 598-01-0203-063#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID628889814520211209184044.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-063

    PMA holder →

  • 598-01-0206-003#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID628615590320211209184111.0001##

    3RD VHF Comm Harness

    B/E Aerospace Inc replaces 598-01-0206-003

    PMA holder →

  • 598-01-0203-013#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID622578875320211209184024.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-013

    PMA holder →

  • 598-01-0203-101#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID691125505820211209184059.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-101

    PMA holder →

  • 598-01-0203-033#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID790083533420211209184032.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-033

    PMA holder →

  • 598-01-0203-011#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID584558519202112091840240.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-011

    PMA holder →

  • 598-01-0203-069#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID740475178202112091840470.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-069

    PMA holder →

  • 598-01-0203-077#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID827440729720211209184050.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-077

    PMA holder →

  • 598-01-0203-057#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID919767431020211209184042.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-057

    PMA holder →

  • 598-01-0203-001#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID375679924320211209184019.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-001

    PMA holder →

  • 598-01-0203-081#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID805726633320211209184052.0001##

    Assembly-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-081

    PMA holder →

  • 598-01-0203-079#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID643845416620211209184051.0001##

    Assemby-Cabin Harness

    B/E Aerospace Inc replaces 598-01-0203-079

    PMA holder →

  • 598-01-0206-007#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID642680716420211209184112.0001##

    3RD VHF Comm Harness

    B/E Aerospace Inc replaces 598-01-0206-007

    PMA holder →

+ 20 more PMA parts on file

08 /  Special Conditions

Type-specific airworthiness rules for BELL TEXTRON INC 525

2 Special Conditions on file. Issued under 14 CFR 21.16 when this type's design features fall outside the applicable airworthiness regulations and require a tailored standard.

  • 29-057-SC

    Special Conditions: Bell Textron Inc. (Bell) Model 525 Helicopter; Static Longitudinal Stability Compliance

    Parts 29, 21, 11, 34, 36

    08/22/2024 →

  • 29-054-SC

    Special Conditions: Bell Textron Inc., Model 525 Helicopter; Fly-By-Wire (FBW) \nFlight Control System (FCS)

    Part 29

    01/28/2021 →

09 /  Equivalent Level of Safety findings

ELOS findings issued for BELL TEXTRON INC 525

1 ELOS finding on file. The FAA issues an ELOS when an applicant proposes an alternative means that achieves the same safety outcome as a literal regulation — a standing record of which certification deviations the agency has approved for this model series.

  • ST1964DRB-A-P-1

    Electronic Engine Control Systems, Powerplant Engine Display

    § 23.1305, 23.1311, 23.1337, 23.1549…

    04/23/2020 →

04 /  Regulations watching this type

Advisory Circulars and Federal Register activity for BELL TEXTRON INC 525

05 /  Aircraft of this type

All 4 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.

4 of 4
N-number St Year NTSB FAA
N5251 TX — · Look up ↗
N5257 TX — ● Look up ↗
N5258 TX — ● Look up ↗
N5259 TX — · 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 →