INADVERTENT FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IIMC)

INADVERTENT FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IIMC)

TO: ALL FLIGHT STUDENTS AND FLIGHT INSTRUCTORS

FROM: DR. MICHAEL CANDERS, AVIATION CENTER DIRECTOR

DATE: APRIL 17, 2018

RE: INADVERTENT FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IIMC)

Inadvertent VFR flight into IMC or IIMC is extremely dangerous for all pilots, regardless of experience level, but especially so for non-instrument rated pilots:

FROM THE AIRPLANE FLYING HANDBOOK FAA-H-8083-3B P 17-15

The first steps necessary for surviving an encounter with IMC by a VFR pilot are as follows:

  • Recognition and acceptance of the seriousness of the situation and the need for immediate remedial action
  • Maintaining control of the airplane
  • Obtaining the appropriate assistance in getting the airplane safely on the ground

IF IIMC IS ENCOUNTERED

  1. Remain calm and begin an instrument scan to maintain control of the aircraft (always have aircraft trimmed properly for the selected altitude and airspeed and don't over control)
  2. Advise ATC on the selected frequency that you have entered inadvertent IMC and require immediate assistance.
  3. Squawk 7700
  4. Follow ATC guidance to exit IMC. Turn with not more than ten degrees angle of bank.

TRAINING TECHNIQUES

CFIs must ensure that they prepare their students for IIMC especially prior to approval for solo cross country flights. Student and instructor should read the Airplane Flying Handbook section on IIMC in Chapter 17, Emergency Procedures. Simulate IIMC on a training flight or in the simulator. Instructors should play the role of an air traffic controller on the intercom and have the student practice talking to you on the intercom to get instructions. Have the students practice turns while wearing foggles under simulated ATC control.

Last Modified 3/6/20