When the plane is flying at the beginning its call letters are C-FJSM. But after it crashes at least three of the letters are now LHA.
During the approach to the guerrilla camp, the Squad Leader pulls out a pair of binoculars. The strap covers the right-hand lens but in the next shot the strap is completely gone.
At 18:44 the chopper is seen going down in a ravine. But at 20:04 smoke from the wreckage and the crash survivors are seen in a jungle setting.
The throttle controls in the single engine plane shown at the beginning are actually for a dual engine plane.
When the terrorist fires the M72 LAW the rocket follows the helicopter as if it was a heat-seeking rocket, yet the M72 in real life is not, its designed for Anti-Tank and not lock on.
During the fire fight at the jungle base, one of the guerrillas is supposed to be firing an M-16 on full auto, but his finger isn't on the trigger, it is outside the trigger guard.
Marquez asks the Captain for some water, when he returns the canteen,
(1:10:20) the cap is missing from the plastic canteen.