| AD Number | 58-20-02 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Aircraft"] | Product Subtype | ["Small Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | de Havilland Aircraft Co., Ltd., The |
| Model(s) | D.H. 104 Dove Series 1A D.H. 104 Dove Series 2A D.H. 104 Dove Series 5A D.H. 104 Dove Series 5BA D.H. 104 Dove Series 6A D.H. 104 Dove Series 6BA D.H. 104 Dove Series 7A D.H. 104 Dove Series 7AXC D.H. 104 Dove Series 8A D.H. 104 Dove Series 8AXC |
58-20-02 de HAVILLAND: Applies to All Model 104 "Dove" Aircraft.
Compliance required by January 1, 1959.
In an emergency such as a wheels up landing, the placing of the ground/flight switch on the "Ground" position to minimize fire risk would isolate the fire extinguisher system.
Dove Modification 655 has therefore been introduced which provides an electrical supply to the fire extinguisher circuit from the battery side of the ground/flight switch, even when the switch is in the "Ground" position, thus ensuring that the fire extinguisher system is operative at all times.
The British Air Registration Board considers this mandatory. The FAA concurs with this action and considers compliance therewith mandatory.
(de Havilland TNS CT (104) No. 153 covers the same subject.)