FORD 2012 F-550 v.2 - Manual (Page 186)

The airbag SRS is designed to activate when the vehicle sustains lateral
deceleration sufficient to cause the sensors to close an electrical circuit
that initiates airbag inflation.
The fact that the airbags did not inflate in a collision does not mean that
something is wrong with the system. Rather, it means the forces were
not of the type sufficient to cause activation. Side airbags are designed
to inflate in side-impact collisions, not roll-over, rear-impact, frontal or
near-frontal collisions, unless the collision causes sufficient lateral
deceleration.
WARNING: Several airbag system components get hot after
inflation. Do not touch them after inflation.
WARNING: If the side
airbag has deployed, the
airbag will not function again.
The side airbag system
(including the seat) must be
inspected and serviced by an
authorized dealer. If the airbag
is not replaced, the unrepaired
area will increase the risk of injury
in a collision.
Safety Canopy ா System (if equipped)
WARNING: Do not place
objects or mount equipment
on or near the headliner at the
siderail that may come into
contact with a deploying Safety
Canopy
௡. Failure to follow these
instructions may increase the risk
of personal injury in the event of a
collision.
Seating and Safety Restraints
186
2012 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)