HS 125 Series
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 120; Flight Crew Total 8800; Flight Crew Type 2200
Confusion; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
Departed empty on a quick-turn repositioning leg. I was PM (pilot monitoring). Shortly after a normal liftoff and commanding gear retraction; crew noticed a red 'R GEAR' lamp on the instrument panel. About the same time; the Tower radioed us and let us know our right main gear appeared to be fully extended; with the left and nose gears retracted. (all 3 green gear lights were extinguished). We continued our IFR departure and were handed off to Departure. ZZZ Tower had already informed ZZZ1 Departure of our gear issue; and Departure asked our intentions. I requested a level off and we referenced the 'Abnormal' checklist which directed us to lower the gear and land. I requested a change in destination to ZZZ1. During cruise to ZZZ1; I took the flight controls and became PF (pilot flying). The remainder of the flight and landing at ZZZ1 were normal. Visually checking the main gear after landing revealed no apparent problems. Gear locking pins were all accounted for and had been removed prior to our flight. After landing; I telephoned the Tower to gather more information. The Tower Controller re-confirmed that it was 'apparent' to him that the right main gear appeared to be fully extended while the nose and left had retracted.
HS-125 Captain reported right main landing gear failed to retract resulted in return to departure airport.