SMOKE DETECTION AND THE COMPARTMENTS BEHIND THE WARNING
Smoke protection is allocated by compartment. The supplied overview identifies cargo and lavatory smoke/extinguishing functions, avionics smoke detection, and portable extinguishers for occupied areas. That inventory does not make all smoke warnings equivalent. An avionics-ventilation indication refers to detection in a ventilation path; a cargo warning identifies a different protected space and response. Maintain the warning’s location and its applicable procedure rather than substituting a generic smoke switch flow. [78, PDF p. 2]
The avionics-bay example links smoke detection in the ventilation duct with associated indications on the ventilation and electrical panels. It illustrates an important diagnostic principle: a panel light can represent smoke sensed elsewhere in the system, rather than failure of the labelled generator itself. Ventilation configuration and source isolation can then change both smoke transport and equipment cooling. Read the title and system context before interpreting one illuminated control in isolation. [78, PDF pp. 13–14] [87, PDF p. 163]
Cargo-compartment detection and extinguishing must be assessed with the compartment’s containment and air/heat configuration. Isolating a protected space and applying agent have different functions; reopening or ventilating it changes the situation. A lavatory installation is another distinct protection arrangement rather than a scaled-down cargo panel. This chapter intentionally does not infer bottle counts, discharge durations or a simulator reset sequence from the general contents page. The applicable compartment description and emergency procedure must establish those details for the chosen aircraft. [78, Chapter 1.26.40–1.26.50; lavatory and cargo-system scope] [88, ECAM philosophy; identified condition and applicable response]
Fire and smoke interact with electrical power, ventilation, breathing protection, communications and the time available for a suitable landing. Those consequences belong in the operational decision chapter; the systems role here is to preserve a correct map of what was detected and what the actions isolate. An indication clearing after a configuration change does not independently prove that every heat source is removed. Fenix cabin animations and crew announcements are useful context, but they do not by themselves validate a complete physical smoke model. Unsupported detector/agent details remain marked as reference architecture or unverified in the matrix. [78, PDF pp. 2, 13–14] [79, PDF pp. 2–9] [86, Failures Guide; implementation scope]