Perhaps we shouldn’t get too excited about this bombing. In Jan 1985 there was a near identical event, and then from Oct 1985 to Oct 1986 there were another four quite similar.
Edited content from aerospaceweb.org:
23 January 1985 - Lloyd Ačreo Boliviano
Boeing 727 left La Paz, Mexico, for Santa Cruz, Bolivia. While en route with 127 occupants a passenger entered the forward lavatory carrying a suitcase. Inside the suitcase was dynamite that exploded, killing the passenger. Plane landed safely with no additional fatalities.
30 October 1985 - American Airlines
A bomb hidden in a tote bag exploded aboard a Boeing 727. The blast occurred in the forward baggage hold while being unloaded and there were no fatalities.
2 April 1986 - Trans World Airlines Flight 840
A Boeing 727 preparing to land at Athens, Greece, was badly damaged by a bomb explosion. The device consisted of 1 lb of plastic explosive placed under a seat cushion. The detonation blew a 24 ft˛ (2.25 m˛) hole in the fuselage resulting in a rapid decompression that sucked four people from cabin.
3 May 1986 - Air Lanka Flight 512
A Lockheed L-1011 carrying 148 was parked at Colombo terminal, preparing to continue on to the Maldives when an explosive concealed in an onboard cargo crate exploded. The blast ripped the plane in half killing 21 and injuring 41 people. The bomb was most likely planted by Tamil rebels to sabotage peace talks with the Sri Lankan government.
26 October 1986 - Thai Airways International Flight 620
Airbus A300 from Manila to Osaka with 239 occupants; while cruising at 33,000 ft over Tosa Bay off the coast of Japan, an explosion occurred in the aft lavatory. The blast caused a rapid decompression and damaged two of the plane's hydraulic systems. The captain and co-pilot initiated an emergency descent and managed to land heavily damaged aircraft safely at Osaka with no fatalities. The cause of the blast was a hand grenade a passenger was attempting to smuggle into Japan that exploded in the lavatory.
Most of the planes were repaired.