Which indicators show there is smoke in the lavatory?

Which indicators show there is smoke in the lavatory?

• A. Amber light on ACP, amber light on Master Call at 1L, chimes, and red smoke detector light
• B. Red SOS beacon only
• C. Green light on ACP and no chimes
• D. No indicators, only smell

Answer: (A)

When smoke is detected in a lavatory, the alert pattern is designed to be unmistakable to both the flight deck and the cabin crew. The key signals are a red light on the lavatory smoke detector to confirm smoke, an amber light on the ACP (Audio Control Panel) to indicate an abnormal cabin condition, an amber Master Call light at station 1L to alert cabin crew, and audible chimes that grab attention. This combination ensures rapid and clear communications about a lavatory smoke event so crews can respond quickly. The other options don’t match this comprehensive alert: a red SOS beacon alone doesn’t specify lavatory smoke, a green ACP light with no chimes isn’t a warning, and no indicators with only a smell wouldn’t reliably alert the crew.

When smoke is detected in a lavatory, the alert pattern is designed to be unmistakable to both the flight deck and the cabin crew. The key signals are a red light on the lavatory smoke detector to confirm smoke, an amber light on the ACP (Audio Control Panel) to indicate an abnormal cabin condition, an amber Master Call light at station 1L to alert cabin crew, and audible chimes that grab attention. This combination ensures rapid and clear communications about a lavatory smoke event so crews can respond quickly. The other options don’t match this comprehensive alert: a red SOS beacon alone doesn’t specify lavatory smoke, a green ACP light with no chimes isn’t a warning, and no indicators with only a smell wouldn’t reliably alert the crew.