What was found
(CAN) ON ARRIVAL BACK AT BASE, CREW NOTIFIED THAT THE NOSE GEAR DID NOT COMPLETELY RETRACT, WITH A NOSE GEAR IN TRANSIT WARNING ON. GEAR CIRCUIT BREAKER PULLED AND RESET. GEAR THEN LOCKED UP. INVESTIGATION FOUND THAT THE LEFT NOSE DOOR WAS DAMAGED AT ABOUT 12 INCHES FROM THE FRONT AS A RESULT OF HAVING CAUGHT THE FUSELAGE NOSE SKIN. BOTH DOORS WERE REMOVED AND LEFT DOOR REPAIRED, AND BOTH DOORS TRIMMED FOR CLEARANCE. THE LEFT NOSE SKIN HAD BEEN PREVIOUSLY REPLACED DUE TO A BIRD STRIKE. AD 90-06-06R1 AND SB SA226-32-055 ADDRESS A SIMILAR PROBLEM OF DOOR CLEARANCE.