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Accident: Sun Express B738 at Antalya on May 1st 2016, nose gear retracted at gate
A Sun Express Boeing 737-800, registration TC-SNP performing flight XQ-366 from Antalya (Turkey) to Paderborn (Germany), was preparing for departure at the gate, passengers had not yet boarded, technicians were working to replace one of the nose gear tyres when the nose gear retracted. A technician received minor head, two cabin crew members minor injuries, all were taken to a hospital. (avherald.com) 기타...
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I must have missed something here. If they were replacing a nose wheel and had the gear jacked up, why would you even think about removing the gear pin as it has nothing to do with tire changing! Not being a mechanic, but I seem to remember an incident where a disgruntled mech set up the crew by, disabling the wow switch, removing the gear pin, selecting the gear lever up, turning on the electric hydraulic pump ( all on a dark airplane) and when the crew arrived for preflight, they turned on the battery switches and the nose gear rolled out (retracted) from under them.
The accident report provides contradictory information, first it states the nose gear retracted, then later states the nose gear collapsed. This is two differing failures, one is likely caused by incorrect indications to the aircraft systems for WOW (weight on wheels), the other is indicative of a mechanical failure mechanism. From the verbiage of the report, it seems the former is most likely true, the WOW was probably faulty or bypassed, and somehow a gear retract activation was sensed by the aircraft system. Since there was maintenance occurring during the time of the accident, it is most likely someone was not following a procedure.
Was the technician that received minor head, in the cockpit???
I wonder what Preacher would say.
I'm guessing the proper maintenance procedure was not followed.
I guess if the gear was purposely retracted, the gear override must have been used because WOW would prevent retraction on the ground. Once they extracted the nose gear pin, the guy in the cockpit raised the handle again and obviously the nose gear retracted. It didn't collapse. I assume the mains were pinned. Funny that if he acted really quick and put the handle down again, the gear might have come down to prevent the damage.
