# AD 80-08-04: Auxiliary Fuel System - Type: Airworthiness directive - Status: Current - Products: Chadwick C-20 auxiliary fuel system (Phoenix Air-Atlanta STC SH129WE or SH139WE) - Effective: April 17, 1980 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Amendment: 39-3736 - Registered aircraft: 2,089 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/99DCABC37C29DB2986256A3400625BE8.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/80-08-04 ## The airworthiness directive 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. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H3WE](https://openairdocs.org/tcds/H3WE): MD Helicopters LLC; names 10 of 12 models: 369D, 369E, 369F, 369FF, 369HS, 369HM, 369HE, 369H… - [TCDS H2SW](https://openairdocs.org/tcds/H2SW): Bell Textron Canada Limited; names 8 of 12 models: 206L, 206B, 206L-1, 206L-4, 206A, 206L-3, 206B-1, 206A-1 (OH-58A) ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 2,089 (2,089 by airframe model, 0 by engine model) - Makers: Bell 1,125, Hughes Helicopters 241, Bell Helicopter Textron 178, MD Helicopters 142, Hughes 123, Bell Helicopter Textron Canada 117, Mcdonnell Douglas Helicopter 83, Cessna 55, Mcdonnell Douglas Heli 17, Summa 5 Models with the most aircraft: - [Bell 206B](https://openairdocs.org/model/bell-206b): 790 aircraft (airframe model) - [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 207 aircraft (airframe model) - [Bell 206L-3](https://openairdocs.org/model/bell-206l-3): 159 aircraft (airframe model) - [Bell Helicopter Textron 206L-1](https://openairdocs.org/model/bell-helicopter-textron-206l-1): 149 aircraft (airframe model) - [Bell 206-L4](https://openairdocs.org/model/bell-206-l4): 122 aircraft (airframe model) - [Bell Helicopter Textron Canada 206L-4](https://openairdocs.org/model/bell-helicopter-textron-canada-206l-4): 103 aircraft (airframe model) - [MD Helicopters 369FF](https://openairdocs.org/model/md-helicopters-369ff): 94 aircraft (airframe model) - [Mcdonnell Douglas Helicopter 369E](https://openairdocs.org/model/mcdonnell-douglas-helicopter-369e): 83 aircraft (airframe model) - [Hughes 369HS](https://openairdocs.org/model/hughes-369hs): 69 aircraft (airframe model) - [Cessna 206](https://openairdocs.org/model/cessna-206): 55 aircraft (airframe model) - [MD Helicopters 369E](https://openairdocs.org/model/md-helicopters-369e): 42 aircraft (airframe model) - [Hughes 369A](https://openairdocs.org/model/hughes-369a): 32 aircraft (airframe model) - [Bell Helicopter Textron 206B](https://openairdocs.org/model/bell-helicopter-textron-206b): 29 aircraft (airframe model) - [Hughes Helicopters 369E](https://openairdocs.org/model/hughes-helicopters-369e): 29 aircraft (airframe model) - [Bell 206A](https://openairdocs.org/model/bell-206a): 23 aircraft (airframe model) - [Mcdonnell Douglas Heli 369FF](https://openairdocs.org/model/mcdonnell-douglas-heli-369ff): 17 aircraft (airframe model) - [Bell 206](https://openairdocs.org/model/bell-206): 16 aircraft (airframe model) - [Hughes 369A (OH-6A)](https://openairdocs.org/model/hughes-369a-oh-6a): 11 aircraft (airframe model) - [Bell Helicopter Textron Canada 206B](https://openairdocs.org/model/bell-helicopter-textron-canada-206b): 10 aircraft (airframe model) - [Bell 206A-1](https://openairdocs.org/model/bell-206a-1): 6 aircraft (airframe model) All 38 models: https://openairdocs.org/ad/80-08-04/models.md Every aircraft: https://openairdocs.org/ad/80-08-04/aircraft.md ## Related documents - [AC 43.13-1B CHG 1 Ed Update](https://openairdocs.org/ac/43.13-1): Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair. Cited as AC 43.13 in the AD's requirements - [AC 43.13-2C](https://openairdocs.org/ac/43.13-2): Acceptable Methods, Techniques, and Practices – Aircraft Alterations. Cited as AC 43.13 in the AD's requirements - [STC SH129WE](https://openairdocs.org/stc/SH129WE): Installation of Chadwick C-20 auxiliary fuel system. (369HS (SN 0101 & subs), 369HE (SN 0101 & subs), 369HM (SN 0201 & subs), 369D (SN 033 & subs)). Phoenix Air-Atlanta, Named in the applicability - [STC SH139WE](https://openairdocs.org/stc/SH139WE): Installation of Chadwick C-22 auxiliary fuel system and C-30 ferry kit.. Phoenix Air-Atlanta, Named in the applicability --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.