59-12-03: Fire Extinguisher
FAA order 59-12-03 is an airworthiness directive. The FAA's subject line: Fire Extinguisher. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Vickers-Armstrongs (Aircraft Limited)
- Models
- Viscount 745D, Viscount 810
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (980 characters)
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.)
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/59-12-03.json · aircraft systems.