Date: 201312
Local time of day: 1801-2400
Location: ZZZ.Airport, US
Flight conditions: VMC
Weather elements / visibility: 10
Light: Night
Aircraft: Shorts SD-360
Operator: Air Taxi
Operating under: Part 135
Flight plan: IFR
Mission: Cargo / Freight / Delivery
Flight phase: Landing
Airspace: Class B ZZZ
ATC / advisory: Tower ZZZ
Aircraft component: Indicating and Warning - Landing Gear
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Pilot Flying; Captain
Reporter qualification: Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Flight Instructor
Human factors: Troubleshooting; Human-Machine Interface
Anomaly: Aircraft Equipment Problem Critical; Ground Event / Encounter Other / Unknown
Detector: Person Flight Crew
When detected: In-flight
Result: Aircraft Aircraft Damaged; Flight Crew Landed in Emergency Condition; General Maintenance Action; General Evacuated; General Declared Emergency
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: I was serving as Pilot in Command aboard a Shorts 360-300; along with my First Officer. We were flying into a major Class B Airport in the early evening and First Officer was flying the aircraft at the time. Weather at our destination airport was VFR and we were cleared for the ILS 30. In accordance to our SOP's I began running the Approach Checklist. When the landing gear selector was placed in the down position; the right main gear light illuminated red instead of its normal green color. Upon discovery of the gear unsafe condition we informed ATC of our problem and asked for delayed vectors so we could trouble shoot our problem and run the Appropriate Checklist. I then decided to declare an emergency. While the First Officer was flying the aircraft I completed the Emergency Checklist and was unable to resolve the issue. I then took the controls from First Officer and flew the aircraft while First Officer double checked my execution of the checklist procedures. We then came back around on a low approach to Runway 30L so that the emergency ground crews and Control Tower personnel could visually inspect our gear as we flew by. After completing the low approach all Ground and Tower personnel had stated that the gear looked to be down. We then asked ATC for further vectors so we could verify the checklist was indeed completed correctly and informed them we would be making a full stop landing. Every time the Emergency Checklist had been reviewed it was determined that all items were performed correctly even though we could not get the landing gear down and locked. Since all the checklist items were completed and no change in our situation had occurred I felt our best option was to make a full stop landing due to its runway length and availability of emergency personnel. I was vectored around to the ILS 30L and performed a full stop landing left of centerline in order to keep the aircraft on the runway in case a right main gear collapse occurred. Upon touch down the all three landing gear held the weight of the aircraft for approximately five seconds. After that time the right main landing gear collapsed. Upon collapse of the right main landing gear I instructed the First Officer to shut down both engines and we both evacuated the aircraft safely.




Synopsis: An SD-360-300 had a right main landing gear unsafe indication when the gear were lowered; so an emergency was declared; a Tower fly by confirmed gear down; but after landing and stopping on the runway the right gear collapsed.