On 14th January, 2021, an Embraer EMB-145LR aircraft with nationality and registration marks 5N-BVD, operated by Air Peace Limited, was scheduled for normal passenger flight (four sectors); Lagos-Owerri-Lagos and Lagos-Kaduna-Lagos, with the same flight crew to operate the flights.
At 10:27 h, 5N-BVD departed Murtala Muhammed International Airport Lagos (DNMM) for Kaduna airport (DNKA) for the third sector as Flight APK7376 on an Instrument Flight Rules (IFR) flight plan with 53 persons on board (49 passengers and 4 crew) and fuel endurance of three hours. The Co-Pilot was the Pilot Flying (PF), while the Pilot was the Pilot Monitoring (PM).
According to the flight crew, as APK7376 was climbing out of Lagos, an advisory light Hydraulic 1 low quantity (HYD1 LO QTY) indication on the Engine Indicating and Crew Alert System (EICAS) came ON. The Co-pilot transferred control to the Pilot and read out the Quick Reference Handbook (QRH) section 10-7 (HYDRAULIC SYSTEM LOW QUANTITY), which advised the flight crew to monitor the affected system. The flight crew then monitored the hydraulic system 1 indication on the Multi-Function Display (MFD), which indicated low hydraulic quantity. At this time, the Co-Pilot took over control of the aircraft again and the crew continued to monitor the hydraulic system 1 until landing at the destination airport.