AD 59-12-03
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
October 31, 1959
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount 745D and 810 Series Aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.