It would be interesting to get a view from a military ordnance expert whether an explosion near the aircraft could cause an overpressure in an enclosed space with vents to the outside (the aft lavatory)
AAM warheads have a very small explosive charge which would cause no damage.
The charge is used is used as either the core of a fragmentation warhead which would leave multiple puncture holes, or to expand a continuous rod.
Think of a continuous rod as like a bicycle chain which expands outwards like a circular saw. it's designed to cut through and sever the wing or fuselage of the target maximising the chances of disabling an essential component.
