Home / Aviation News / Bristow: Pilot noticed instrument failure, declared Mayday twice-AIB
L-R Mr. Tunji Oketunbi, General Manager, AIB; Dr. Felix Abali, Commissioner, AIB; and Engineer Emmanuel Diala, Director of Engineering, AIB at the agency's press conference in Lagos, recently

Bristow: Pilot noticed instrument failure, declared Mayday twice-AIB

L-R Mr. Tunji Oketunbi, General Manager, AIB; Dr. Felix Abali, Commissioner, AIB; and Engineer Emmanuel Diala, Director of Engineering, AIB at the agency's press conference in Lagos, recently
L-R Mr. Tunji Oketunbi, General Manager, AIB; Dr. Felix Abali, Commissioner, AIB; and Engineer Emmanuel Diala, Director of Engineering, AIB at the agency’s press conference in Lagos, recently

Accident Investigation Bureau (AIB) has revealed that the pilot of the Bristow Helicopters Sikorsky 76C++ which was ditched into the Atlantic Ocean had noticed instrument problems while in flight and declared a Mayday twice before ditching the helicopter.

Commissioner of AIB, Dr. Felix Abali, who gave the insights this evening into the Bristow Helicopters’ Sikorsky 76C++ aircraft incident said the first Mayday was declared by the crew at the 78 Nautical Miles from Lagos complaining of instrument problems While she declared declared the other Mayday to the radio operator at the offshore platform, which was relayed to the air traffic controller by two separate aircraft.

Mayday is an emergency procedure word used internationally as a distress signal in voice procedure radio communications.

It is used to signal a life-threatening emergency primarily by aviators and mariners. The call is always given three times in a row “Mayday Mayday Mayday” to prevent its being mistaken for some similar-sounding phrase under noisy conditions, and to distinguish an actual Mayday call from a message about a Mayday call.

Avail sad,”The crew declared May Day twice. The first was declared by the crew at the 78 Nautical Miles from Lagos complaining of instrument problems. The aircraft descended from 3000 feet to 1500 feet. At this time the flying officer (FO) was the pilot flying (PF).

“The captain took over control expecting to stabilize the helicopter but the aircraft was not responding to control inputs. She declared the 2nd MayDay to the radio operator at the offshore platform, which was relayed to the air traffic controller by two separate aircraft. One aircraft was following the communication and relayed the ditching, which occurred at 10:20am at 29 nautical miles away from the platform,” he said.

After the rescue, Abali said the nine passengers and two crew members were met by AIB where they (passengers and crew) were transferred to Lagoon Hospital, Lagos Island.

He said toxicological tests administered on the crew proved negative of any substance abuse.

He said initial field investigation was carried out by AIB and vital components relevant to the investigation including flight data recorder and cockpit voice recorder (FDR/CVR) and the cockpit image recorder were retrieved for further investigation.

The commissioner said essential flight recorders will be flown out for downloading while TRIM actuators would be sent to the manufacturers for investigative testing.

 

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