Avianca F100 at Brasilia on Mar 28th 2014, landed without nose gear

An Avianca Brasil Fokker 100, registration PR-OAG performing flight O6-6393 from Petrolina,PE to Brasilia,DF (Brazil) with 44 passengers and 5 crew, was on approach to Brasilia when the crew reported an unsafe gear, aborted the approach and entered a hold to work the related checklists, but were unable to resolve the problem. The crew declared emergency and prepared for a possible partial gear landing at 18:36L (21:36Z) about 25 minutes after aborting the first approach. The aircraft landed on its main gear, the crew held the nose up as long as practicable before lowering the nose onto the runway and coming to a stop on the runway. Emergency services foamed the aircraft. There were no injuries, the aircraft sustained substantial damage.