Day 13 Progress Check Flashcards
What should be inspected when a lavatory fire extinguisher system has been activated?
The integrity of the extinguisher’s solder-sealed nozzles.
What is the primary way to determine whether a lavatory fire extinguisher bottle is empty or full?
By weighing the bottle.
What triggers the lavatory smoke detection system to send signals to the cabin control panels and flight crew?
Smoke entering the sensing chamber of the smoke detector.
Why must the fire detection system’s test switch be regularly checked during maintenance?
To verify the alarm and detection circuits are functioning properly.
What common issue can cause intermittent false alarms in a lavatory smoke detection system?
Intermittent shorts in the detector system wiring.
Why is it important to check for abrasion on sensing elements during fire detection system maintenance?
Abrasion can create false alarms by exposing internal wiring.
What is the main reason why Halon 1301 is still used in lavatory fire extinguishing systems despite environmental concerns?
There is no equally effective replacement for Halon 1301 in aviation applications.
What must be done if a lavatory fire extinguisher cartridge is removed during maintenance?
It should not be used in another discharge valve assembly due to possible variations in contact point protrusion.
Why is it important to inspect rubber grommets in the mounting clamps during fire detection system maintenance?
Damaged grommets can cause abrasion on sensing elements.
How does a lavatory smoke detector typically cancel the alarm once smoke dissipates?
The system automatically resets when no smoke is detected.
What type of extinguisher is typically used in lavatory waste compartments?
Halon 1301 extinguisher.
Why are aircraft with a capacity of 20 or more required to have lavatory smoke detection systems?
To meet regulatory standards and ensure passenger safety.
What happens when the lavatory waste compartment temperature reaches approximately 170°F?
The Halon 1301 fire extinguisher system discharges.
How can kinks and sharp bends in sensing elements cause problems in the fire detection system?
They can cause internal wires to short intermittently to the outer tubing.
What is the purpose of checking the continuity of sensing loops during fire detection system troubleshooting?
To ensure the loop is electrically intact and operational.
