58-20-02: Fire Extinguisher Electrical Circuit
FAA order 58-20-02 is an airworthiness directive. The FAA's subject line: Fire Extinguisher Electrical Circuit. System: electrical power.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- de Havilland Aircraft Co., Ltd., The
- Models
- 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
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 (795 characters)
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.)
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/58-20-02.json · aircraft systems.