As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 1809 - WHILE CLIMBING OUT FROM HPN AT 16000 FT, CREW RECEIVED A 'HYD SYS 1 LOW QTY, ALERT. CREW PERFORMED THE ABNORMAL PROCEDURE CHECKLIST. AN EMERGENCY WAS DECLARED AND THE FLIGHT DIVERTED TO PHL. FLIGHT LANDED PHL WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE SPEED BRAKE ACTUATOR DUE TO HYDRAULIC LEAKAGE. (M)