AD 59-12-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 1A | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 2A | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 5A | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 5BA | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 6A | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 6BA | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 7A | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 7AXC | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 8A | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
| aircraft | de Havilland Aircraft Co., Ltd., The | D.H. 104 Dove Series 8AXC | Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft |
Unsafe Condition
The powerplant fire extinguisher spray pipe P/N 4M99ND may have been installed without the required spray holes drilled, leading to ineffective fire suppression.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the spray pipe to verify spray holes are drilled. If holes are missing, remove and replace the pipe with a serviceable item or rework it per de Havilland Technical News Sheet CT (104) No. 163. Ensure all spare powerplants and spares stock are inspected before installation.
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Compliance Time
not later than July 20, 1959
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Affected Aircraft
de Havilland Aircraft Co., Ltd.'s Model 104 'Dove' Series 1A, 2A, 5A, and other listed series aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fire Extinguisher Spray Pipe
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-12-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-12-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft Subject: Fire Extinguisher Spray Pipe Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: de Havilland Aircraft Co., Ltd., The Model: D.H. 104 Dove Series 1A | D.H. 104 Dove Series 2A | D.H. 104 Dove Series 5A | D.H. 104 Dove Series 5...Show more Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-12-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-12-08 SUBJECT HEADING: Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-12-08 de HAVILLAND: Applies to All Model 104 "Dove" Aircraft. Compliance required not later than July 20, 1959. A case has been reported where a powerplant fire extinguisher spray pipe P/N 4M-99ND had been installed without having the spray holes drilled in it. (1) Spray pipe P/N 4M99ND must be inspected to ascertain whether it has the spray holes drilled in it as follows: (a) Open the engine cowlings and inspect the spray pipe running from the distributor unit round the blower casing. (b) If the pipe has not had the spray holes drilled in it remove the pipe and replace with a serviceable item; or (c) The unserviceable pipe may be rendered serviceable by working to the details shown in de Havilland Technical News Sheet CT (104) No. 163. (2) The above inspection, and replacement or rework action where necessary, must be accomplished on all spare powerplants and spares stock before installation in aircraft. The British Air Registration Board considers this mandatory. (de Havilland TNS CT (104) No. 163 covers the same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_59-12-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-12-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft Subject: Fire Extinguisher Spray Pipe Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: de Havilland Aircraft Co., Ltd., The Model: D.H. 104 Dove Series 1A | D.H. 104 Dove Series 2A | D.H. 104 Dove Series 5A | D.H. 104 Dove Series 5...Show more Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-12-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-12-08 SUBJECT HEADING: Airworthiness Directives; de Havilland Model 104 "Dove" Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-12-08 de HAVILLAND: Applies to All Model 104 "Dove" Aircraft. Compliance required not later than July 20, 1959. A case has been reported where a powerplant fire extinguisher spray pipe P/N 4M-99ND had been installed without having the spray holes drilled in it. (1) Spray pipe P/N 4M99ND must be inspected to ascertain whether it has the spray holes drilled in it as follows: (a) Open the engine cowlings and inspect the spray pipe running from the distributor unit round the blower casing. (b) If the pipe has not had the spray holes drilled in it remove the pipe and replace with a serviceable item; or (c) The unserviceable pipe may be rendered serviceable by working to the details shown in de Havilland Technical News Sheet CT (104) No. 163. (2) The above inspection, and replacement or rework action where necessary, must be accomplished on all spare powerplants and spares stock before installation in aircraft. The British Air Registration Board considers this mandatory. (de Havilland TNS CT (104) No. 163 covers the same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
79-02-07
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