AD 59-12-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; VICKERS Models 745D and 810 Series Aircraft |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; VICKERS Models 745D and 810 Series Aircraft |
Unsafe Condition
Graviner fire extinguisher cartridge types A216 and A217 may fail to operate at altitudes exceeding 20,000 feet due to a combination of altitude and temperature affecting the gunpowder charge.
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Required Actions
Install Graviner Modification AU 393 with improved firing units type A716 and A717, identified by a blue plastic band, replacing types A216 and A217. Implement Vickers-Armstrongs modifications PTL205, D.2926, PTL73, and FG.1695 as applicable.
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Compliance Time
October 31, 1959
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount 745D and 810 Series Aircraft
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Federal Register Abstract
Fire Extinguisher
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-12-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-12-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; VICKERS Models 745D and 810 Series Aircraft Subject: Fire Extinguisher Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Vickers-Armstrongs (Aircraft Limited) Model: Viscount 745D | Viscount 810 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-12-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-12-03 SUBJECT HEADING: Airworthiness Directives; VICKERS Models 745D and 810 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-12-03 VICKERS: Applies to All Viscount 745D and 810 Series Aircraft. Compliance required by October 31, 1959. Two cases have occurred of the Graviner fire extinguisher cartridge types A216 and A217 failing to operate at altitudes exceeding 20,000 feet. The failures were due to a combination of altitude and temperature affecting the gunpowder charge. To preclude such failures the Graviner Manufacturing Company has issued Modification AU 393 introducing improved firing units type A716 (replacing type A216) and type A717 (replacing A217). The new units have a modified bridge wire arrangement and may be identified by a blue plastic band around the neck of the cartridge. The British Air Registration Board considers the embodiment of this modification mandatory. (Graviner Manufacturing Company Modification No. AU 393 and Vickers-Armstrongs PTL205 and Modification D.2926 (700 Series) and PTL 73 and Modification FG.1695 (800/810 Series) covers this subject.) FOOTER:
Document Text
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AD Final Rules - DRS_59-12-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-12-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; VICKERS Models 745D and 810 Series Aircraft Subject: Fire Extinguisher Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Vickers-Armstrongs (Aircraft Limited) Model: Viscount 745D | Viscount 810 Product Type: Aircraft Product Subtype: Large 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: 59-12-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-12-03 SUBJECT HEADING: Airworthiness Directives; VICKERS Models 745D and 810 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-12-03 VICKERS: Applies to All Viscount 745D and 810 Series Aircraft. Compliance required by October 31, 1959. Two cases have occurred of the Graviner fire extinguisher cartridge types A216 and A217 failing to operate at altitudes exceeding 20,000 feet. The failures were due to a combination of altitude and temperature affecting the gunpowder charge. To preclude such failures the Graviner Manufacturing Company has issued Modification AU 393 introducing improved firing units type A716 (replacing type A216) and type A717 (replacing A217). The new units have a modified bridge wire arrangement and may be identified by a blue plastic band around the neck of the cartridge. The British Air Registration Board considers the embodiment of this modification mandatory. (Graviner Manufacturing Company Modification No. AU 393 and Vickers-Armstrongs PTL205 and Modification D.2926 (700 Series) and PTL 73 and Modification FG.1695 (800/810 Series) covers this subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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