As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HPN/PHL - FLT 3158 - WHEN SELECTING GEAR UP, GEAR WOULD NOT RETRACT. RED, GREEN, AND HANDLE LIGHTS ON. GEAR CONFIRMED DOWN AND DOORS CLOSED. THE AIRCRAFT TURNED BACK TO HPN AND LANDED WITHOUT INCIDENT. REMOVED AND REPLACED THE 3261-K5 RELAY. (X)