MANILA (AP) - The Philippine Air Force has grounded its fleet of U.S.-made MG-520 helicopter gunships after one crashed at sea while taking part in a clash with Muslim insurgents, killing one of its two pilots, officials said Sunday.
Lt. Gen. Eugenio Cedo, a regional military commander, denied news reports that the helicopter was shot down by rebel gunfire, saying engine trouble apparently brought the aircraft down while it was flying back to a military camp.
Air force spokesman Lt. Col. Epifanio Panzo said 17 McDonnell-Douglas MG-520s were ordered grounded pending an investigation into the cause of the crash Saturday of one of the four-seat attack helicopters off southern Basilan island.
Air force investigators were at the crash site to supervise the retrieval of the helicopter and determine why it crashed, Panzo said.
With the MG-520s grounded, government troops will have to temporarily rely on a fleet of Vietnam War-era Huey helicopters and OV-10 bomber planes in an offensive against Abu Sayyaf insurgents on Basilan and nearby Jolo island, Panzo said.