A Rano Air Embraer ERJ-145, registration 5N-BZY performing flight R4-2024 from Abuja to Sokoto (Nigeria) with 51 passengers and 4 crew, was enroute at FL260 when the crew observed increasing oil temperature for the left hand engine (Ae3007) followed by decreasing oil pressure. The crew reduced thrust on the left hand engine and decided to descend. During the descent smoke developed on the flight deck, cabin crew also reported smoke in the cabin. The flight crew donned their oxygen masks, worked the related checklists and declared emergency. Descending through FL100 the crew received indications the left hand engine had failed, the smoke dissipated. The aircraft continued to Sokoto for a safe landing.
The aircraft remained on the ground in Sokoto until Jul 8th 2025, then positioned to Abuja and resumed service.
Nigeria's NSIB released their preliminary report into the occurrence rated a serious incident stating:
During a post-occurrence interview, the maintenance engineer who worked on the aircraft after the occurrence stated that a large oil leak was discovered on the center scavenge oil sump transfer to the fairing core oil tube diffuser fittings. The engineer conducted a cleaning of the engine area and then cranked the engine without ignition (motoring), during which another oil leak was observed.
The engineer stated that the source of the smoke was determined to be oil entering the bypass duct, where fan air flows to the pre-cooler and mixes with bleed air from the engine that supplies air to the Environmental Control System (ECS).
The aircraft remained on the ground in Sokoto until Jul 8th 2025, then positioned to Abuja and resumed service.
Nigeria's NSIB released their preliminary report into the occurrence rated a serious incident stating:
During a post-occurrence interview, the maintenance engineer who worked on the aircraft after the occurrence stated that a large oil leak was discovered on the center scavenge oil sump transfer to the fairing core oil tube diffuser fittings. The engineer conducted a cleaning of the engine area and then cranked the engine without ignition (motoring), during which another oil leak was observed.
The engineer stated that the source of the smoke was determined to be oil entering the bypass duct, where fan air flows to the pre-cooler and mixes with bleed air from the engine that supplies air to the Environmental Control System (ECS).
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