AD 80-08-04
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206A | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206A-1 (OH-58A) | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206B | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206B-1 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L-1 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L-3 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L-4 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| aircraft | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | Auxiliary Fuel System | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206A | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206A-1 (OH-58A) | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206B | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206B-1 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L-1 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L-3 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 206L-4 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | Auxiliary Fuel System | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369 | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369A | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369D | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369E | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369F | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369FF | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369H | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369HE | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369HM | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
| appliance | Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. | 369HS | Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE |
Unsafe Condition
Static discharge type of source ignition could occur due to inadequate bonding and grounding of the Chadwick Model C-20 or C-22 Auxiliary Fuel System installations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install the Chadwick, Inc. supplied bonding and grounding harness kit within 120 days after the effective date. Conduct a continuity check every 100 hours time in service to ensure proper grounding.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 120 days after the effective date of this Airworthiness Directive
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hughes Model 369 Helicopters with Chadwick Model C-20 Auxiliary Fuel System per STC SH129WE and Bell Model 206 Helicopters with Chadwick Model C-22 Auxiliary Fuel System per STC SH139WE
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Auxiliary Fuel System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_80-08-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-08-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped wit...Show more Subject: Auxiliary Fuel System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/17/1980 Make: Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. Model: 206 | 206A | 206A-1 (OH-58A) | 206B | 206B-1 | 206L | 206L-1 | 206L-3 | 206L-4 | Auxiliary Fuel Syst...Show more Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-08-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3736 AD NUMBER: 80-08-04 SUBJECT HEADING: Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE ACTION: SUMMARY: DATES: Effective April 17, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-08-04 CHADWICK, INC.: Amendment 39-3736. Applies to all Hughes model 369 helicopters equipped with Chadwick model C-20 Auxiliary Fuel System installed as per STC SH129WE and Bell model 206 helicopters equipped with Chadwick, Inc. model C-22 Auxiliary Fuel System installed per STC SH139WE. Compliance is required as indicated. To prevent a static discharge type of source ignition, accomplish the following: A. Within 120 days after the effective date of this Airworthiness Directive, unless already accomplished, install the Chadwick, Inc. supplied appropriate bonding and grounding harness kit in accordance with Chadwick, Inc., Installation Instructions dated January 2, 1980, (for the C-20 installation) or December 27, 1979, (for the C-22 installation), or an equivalent modification approved by the Chief, B. Conduct a continuity check every 100 hours time in service while equipped with the Chadwick, Inc. auxiliary fuel system, to assure proper grounding between attach points of bonding and grounding kits. Reference: AC 43.13.1A, Chapter 11, Section 3, Paragraph 452, Page 188. The manufacturer's specifications and procedures identified and described in this Directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Chadwick, Inc., 11969 Southwest Herman Road, Sherwood, Oregon 97140. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective April 17, 1980. FOOTER:
Document Text
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AD Final Rules - DRS_80-08-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-08-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped wit...Show more Subject: Auxiliary Fuel System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/17/1980 Make: Bell Helicopter Textron Canada Limited | Chadwick, Inc. | MD Helicopters, Inc. Model: 206 | 206A | 206A-1 (OH-58A) | 206B | 206B-1 | 206L | 206L-1 | 206L-3 | 206L-4 | Auxiliary Fuel Syst...Show more Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-08-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3736 AD NUMBER: 80-08-04 SUBJECT HEADING: Airworthiness Directives; CHADWICK, INC.: Applies to all Hughes Model 369 Helicopters Equipped with Chadwick Model C-20 Auxiliary Fuel System Installed as per STC SH129WE and Bell model 206 Helicopters Equipped with Chadwick, Inc. Model C-22 Auxiliary Fuel System Installed per STC SH139WE ACTION: SUMMARY: DATES: Effective April 17, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-08-04 CHADWICK, INC.: Amendment 39-3736. Applies to all Hughes model 369 helicopters equipped with Chadwick model C-20 Auxiliary Fuel System installed as per STC SH129WE and Bell model 206 helicopters equipped with Chadwick, Inc. model C-22 Auxiliary Fuel System installed per STC SH139WE. Compliance is required as indicated. To prevent a static discharge type of source ignition, accomplish the following: A. Within 120 days after the effective date of this Airworthiness Directive, unless already accomplished, install the Chadwick, Inc. supplied appropriate bonding and grounding harness kit in accordance with Chadwick, Inc., Installation Instructions dated January 2, 1980, (for the C-20 installation) or December 27, 1979, (for the C-22 installation), or an equivalent modification approved by the Chief, B. Conduct a continuity check every 100 hours time in service while equipped with the Chadwick, Inc. auxiliary fuel system, to assure proper grounding between attach points of bonding and grounding kits. Reference: AC 43.13.1A, Chapter 11, Section 3, Paragraph 452, Page 188. The manufacturer's specifications and procedures identified and described in this Directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Chadwick, Inc., 11969 Southwest Herman Road, Sherwood, Oregon 97140. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective April 17, 1980. FOOTER:
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Retrieved: Apr 8, 2026
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