5N-BQJ, Sikorsky S-76C++ aircraft, a domestic chartered flight operated by Bristow Helicopters Nigeria Limited, departed Lagos on the 3rd of February 2016, for ERHA FPSO (Floating Production Storage Off-loading). Instrument meteorological conditions prevailed at the time and Instrument Flight Rule (IFR) flight plan was filed. Two flight crew members and nine passengers were on the outbound trip that was almost uneventful. The captain was in command as the pilot flying (PF), upon landing in ERHA (Off Shore Platform location) a passenger onboard seated in the middle row complained about perceiving a burning smell; although, the flight crew did not perceive any smell. The PF had a word with the passenger and went back to check the internal and external of the aircraft for smell, the check result was negative. However, the crew reported that Digital Auto Flight Control System (DAFCS) and TRIM FAIL lights illuminated twice and were reset on the outboard leg to ERHA FPSO.