Engine or APU on fire
May result in
abandoned take-off
engine failure
smoke or fire in the cockpit
emergency landing
Expect
heavy workload in cockpit
engine shutdown / fire extinguishing
Aircarft on the ground
hot brakes
passenger evacuation
RWY blocked
Aircraft in the air
pressurisation problems
aircrafts loosing altitude
landing next suitable airport
possible diversionary or forced landing (for single engine aircrafts)
Remember
A 'Acknowledge' - S 'Separate' - S 'Silence' - I 'Inform' - S 'Support - T 'Time'
ask if dangerous goods on board
ask for number of POB
inform landing airport
clear RWY according to local procedures and instructions
keep safety strip clear
in case of diversionary or forced landing, record last known position and time
If needed, inform pilot about
next suitable airport
airport details as soon as possible
weather infomation of landing airport
observed fire and/or smoke