| Narrative Type: NTSB FINAL NARRATIVE (6120.4) |
| THE INSTRUCTOR PLT (CFI) RPRTD HE ELECTED TO MAKE A PRECAUTIONARY LANDING AFTER HE SMELLED SMOKE IN THE COCKPIT. DRG THE LANDING, THE ACFT ENCOUNTERED SOFT DIRT & NOSED OVER, DAMAGING THE VERTICAL STABILIZER. AN EXAM OF THE ENG REVEALED THERE WAS A BIRD'S NEST IN THE VICINITY OF THE #2 & #3 CYLINDERS. NO EVIDENCE OF ANY OTHER POSSIBLE SOURCE OF SMOKE OR FIRE WAS FOUND. ACCORDING TO AN FAA INSPECTOR, WHO EXAMINED THE ACFT, THE NEST WAS PARTIALLY HIDDEN, BUT IT COULD HAVE BEEN SEEN DRG A PREFLIGHT INSPECTION WITH ADEQUATE LIGHTING. BOTH THE CFI & STUDENT HAD PREFLIGHTED THE ACFT, BUT NEITHER SAW THE BIRD'S NEST. |
| Narrative Type: NTSB PROBABLE CAUSE NARRATIVE |
| THE FOREIGN MATERIAL (BIRD NEST) IN THE ENGINE COMPARTMENT, AND FAILURE OF THE DUAL STUDENT OR INSTRUCTOR PILOT (CFI) TO IDENTIFY AND REMOVE IT DURING THEIR PREFLIGHT INSPECTION OF THE AIRCRAFT. SOFT TERRAIN IN THE EMERGENCY LANDING AREA AND SMOKE FROM THE ENGINE COMPARTMENT WERE FACTORS. |
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