Smoke detectors control System
Smoke detectors control System
Smoke Detection Control Panel (SDCP) is part of Smoke Detection system for forward lavatory and in the supernumerary area.
The SDCP provides smoke Alarms and test capability for the smoke detectors.

Develop and certificate - RTCA/DO-254 DAL-B , Design Assurance Guidance for Airborne Electronic Hardware

The system includes the following LRUs:
  • SDCP.
  • 2 smoke detectors.
The SDCP panel  installed on cockpit on Pedestal (P8 or P5) of B737-700 airplanes.

:System Functions
  • The system able to detect smoke in the forward lavatory and in the supernumerary area. 
  • The system perform a functional test of the smoke detector(s) when the TEST button is pressed. 
  • When smoke is detected, the system provide warning indication of the compartment in which smoke has been detected (either forward lavatory or supernumerary area). 
  • When smoke is detected, the system activate the aircraft aural warning. 
  •  the system able to silence the aural warning by pressing the BELL CUT-OUT button. 
 
Environmental Conditions:
  • RTCA, DO-160G, Par 4, Category A1Altitude15.000 ft
  • RTCA, DO-160G, Par 4.5.1 Category A1  Ground survival Low temperature -55°C
  • RTCA, DO-160G, Par 4.5.2 Category A1Operating Low Temperature-15°C
  • RTCA, DO-160G, Par 4.5.3 Category A1Ground survival High temperature +85°C
  • RTCA, DO-160G, Par 4.5.4 Category A1Operating High Temperature+55°C
  • RTCA, DO-160G, Par 5.0 Category A  Temperature variation-15°C +55°C
  • RTCA, DO-160G, Par 6.3.3 Category A Humidity+38°C - RH 85% max +50°C - RH 95% max.
  • RTCA, DO-160G, Par 7.0 Category E Operation Shock6g, 11 ms, sow tooth, 18 shocks
  • RTCA, DO-160G, Par 7.0 Category E Shock safety crash20g, 11 ms, sow tooth, 6 shocks
  • RTCA, DO-160G, Par 7.3.3 Category E Shock safety (sustained) crash (acceleration)18g, 3 sec
  • RTCA, DO-160G, Par 8.0 Category S Sine vibration20g, 5-500 Hz,
  • RTCA, DO-160G, Category B , 16.0 Electrical – power inputs  
  • RTCA, DO-160G, Category B , 17.0 Electrical – voltage spikes conducted    
  • RTCA, DO-160G, Category BC , 19.0 EMC – magnetic effects  
  • RTCA, DO-160G, Category BC , 19.0 EMC  - AF conducted susceptibility   
  • RTCA, DO-160G, Category BC , 19.0 EMC – induced signal susceptibility  
  • RTCA, DO-160G, Category S , 20.0 EMC – RF susceptibility (conducted and radiated) Conducted –F Radiated - F
  • RTCA, DO-160G, Category B , 21.0 EMC – Emission of RF energy  
  • RTCA, DO-160G, Category B , Level1 , 22.0 EMC- Lightning induced transient  
  • RTCA, DO-160G, Category C , 23.0 EMC- Electrostatic discharge