Controlled Flight Into Terrain (CFIT)

Definition

Controlled Flight Into Terrain (CFIT) refers to an accident or incident in which an airworthy aircraft, under full control of the pilot, unintentionally flies into terrain, obstacles, or water without prior awareness of the impending collision. In CFIT events, the aircraft is not malfunctioning, and the pilots are usually unaware of the danger until it is too late.

Purpose of Awareness

  • Highlight one of the leading causes of aviation fatalities, especially in instrument meteorological conditions (IMC)
  • Improve pilot situational awareness during all flight phases
  • Emphasize the need for terrain avoidance procedures and technologies

Common Causes of CFIT

  • Loss of situational awareness, especially in IMC or at night
  • Failure to follow published procedures (e.g., departure/approach charts)
  • Poor communication between pilots or between cockpit and ATC
  • Incorrect altimeter settings or overlooked terrain elevations
  • Fatigue or high workload during critical flight phases

High-Risk Scenarios

  • Non-precision approaches without vertical guidance
  • Night operations in mountainous or unfamiliar terrain
  • Unstabilized approaches in bad weather
  • Loss of situational awareness during circling approaches
  • Descending below minimum descent altitude (MDA) without visual reference

Prevention Measures

  • Strict adherence to published minimum altitudes and approach procedures
  • Use of Terrain Awareness and Warning Systems (TAWS/EGPWS)
  • Effective cockpit resource management (CRM) and communication
  • Proper use and interpretation of navigation charts and terrain data
  • Regular CFIT avoidance training for both VFR and IFR pilots

Technology Aids

  • EGPWS (Enhanced Ground Proximity Warning System): Provides forward-looking terrain alerts and warnings
  • TAWS: Combines GPS position, terrain databases, and aircraft performance to prevent terrain collisions
  • Moving map displays: Show real-time terrain overlays and aircraft position

Pilot Phraseology Examples

  • “Minimums, no contact, going around”
  • “Request vectors for terrain avoidance”
  • “Unable approach due terrain clearance – request holding”

Statistics and Reality

According to ICAO and industry data, CFIT has historically accounted for a significant proportion of aviation fatalities, particularly in approach and landing phases. Most CFIT accidents are preventable with proper situational awareness, adherence to procedures, and technology use.

Tips for Pilots

  • ✅ Always brief terrain and obstacle clearance for all phases of flight
  • ✅ Use terrain display and warning systems when available
  • ✅ Never descend below MDA/DA unless all required visual references are established
  • ✅ Use LearnATC to simulate challenging terrain environments and practice safe decision-making under IFR and VFR conditions