Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
In the descent at Toman intersection; we received a TA (traffic advisory). Our clearance was to cross 45 nautical miles prior to Hosba intersection at FL140. Airspeed was 290 Kts; with the speed brakes fully deployed to meet the restriction. Shortly after that we received an RA (resolution alert); which started as basically flying level flight to a 2000 fpm climb; followed by a 2000 fpm descent. We advised Singapore ATC of the TA and the RA. We also advised ATC that we were following the TCAS RA instructions and that we were unable to comply with the ATC altitude clearance. Visual contact was established with an Indonesian fighter; just off to the right of our aircraft; at the same altitude and close enough to see the pilot clearly. We had been intercepted by at least 2 Indonesian fighters (at least one behind us also). The fighter that we had visual contact with; appeared to be an SU-27. We established radio contact on 121.5 with the fighter. He advised us that we did not have permission to fly in Indonesian airspace. I told him that we were operating on a filed flight plan; with diplomatic clearance to fly in Indonesian airspace. He kept repeating that we did not have permission. I replied that we did and repeated what I said before. I think my exact words at that point were; back off; we are proceeding to Singapore. Shortly after that the fighters left and we proceeded to Singapore and landed.  We need to find out what is going on with Indonesia. We heard another N registered US military flight get intercepted with a very similar dialogue that took place. That flight was going from WSAP to the Philippines. I spoke with Singapore ATC on the telephone. They said there is a big increase in unidentified traffic; which I'm assuming is Indonesian fighter traffic. We were on our flight plan and did have a current Indonesian over-fly number.
Air carrier pilot descending into WASP reported a TCAS RA caused by two Indonesian fighter aircraft that ordered the flight to leave Indonesian Airspace. The reporter stated that he is on a filed flight plan; has an Indonesian overfly number; and is proceeding to WASP. The fighters broke away.