Passenger Seats (including seat backs) are an MEL item on at least one Boeing model and may be inoperative and occupied providing the seat back is latched in the upright position and so placarded. This procedure requires action by a qualified mechanic.
Alternatively, a seat back retaining strap may be employed IF passenger access is not restricted. This procedure may be accomplished by flight crew and requires placarding.
Alternatively, a seat back may be inoperative in other than the upright position IF passenger access is not restricted, the affected seat does not restrict an emergency exit and the seat back is secured. This may be acomplisehed by flight crew and requires placarding.
Seats on and in front of an emergency row generally are modified to be non reclining.
Phew it's a little hot in here. I'd better take my anorak off now.
