History of the Flight
On 10 January 2011, an Embraer EMB-505 aircraft, registered A4O-CY, operated by the Royal Oman Police/DGPA as a demonstration flight, departed from Muscat International Airport at 09:17 UTC. During the first visual circuit, after selecting landing gear down, the crew received a Crew Alerting System indication that the right main landing gear was not locked down. The crew cycled the landing gear and performed flypasts to visually confirm gear extension, but the indication persisted. Believing the issue was a faulty proximity switch, the crew proceeded to land on Runway 08 at 09:39 UTC.
Shortly after touchdown, the right main landing gear partially collapsed, causing the aircraft to bank right and the right wing tip to scrape the runway surface for approximately 1130 meters before the aircraft came to a stop to the right of the runway centerline. There was no fire, and all eight occupants evacuated without injury.
Injuries to Persons
No injuries were reported among the two crew members and six passengers.
Damage to Aircraft
The aircraft sustained considerable damage to the right wing lower skin, front spar (outboard), winglet, rib 20, right wing leading edge, and right flap.
Aircraft Information
The EMB-505, serial number 50500039, was manufactured on 29 September 2010 and registered in Oman on 22 December 2010. It had accumulated 25 hours and 35 minutes of total airframe time and 12 cycles at the time of the incident. The aircraft is a low-wing monoplane with retractable tricycle landing gear, powered by two Pratt & Whitney Canada PW535E turbofan engines.
Examination of the right main landing gear revealed that the extension hydraulic port of the locking actuator was obstructed by a rubber contaminant, preventing full extension to the down and locked position.