How many fire detectors are installed on the aircraft?

The presence of fire detectors on the MH-60S is critical for ensuring safety during operations. The correct count of fire detectors consists of two located on each engine and one on the APU, totaling five detectors. This configuration is designed to provide comprehensive coverage and early detection of potential fire hazards in the aircraft's most critical areas.

Having two detectors for each engine enhances reliability and accuracy, as it allows for cross-verification of readings. Placing one additional detector on the Auxiliary Power Unit (APU) ensures that any overheating or fire condition in this area can be promptly addressed, which is vital given the APU's role in providing power and environmental control while the aircraft is on the ground.

This strategic placement of fire detection systems reflects the design philosophy focused on maximizing safety and responsiveness to fire-related incidents, which is paramount in aviation operations.