About A1Aviation Group


A1Aviation is dedicated to its mission of professional, accurate, and timely aircraft appraisals.

Appraisals are comprehensive, detailed reports of a plane’s value and condition, delivered after careful examination. There is no guesswork here. With extensive experience, education and accuracy, A1Aviation delivers independent, impartial aircraft appraisals to financing entities, insurance companies, private buyers, and law firms.

A1Aviation Group is certified by the National Aircraft Appraisers Association (NAAA). What this credential means to our valued clients is that A1Aviation abides by rigid standards of professional conduct. A1Aviation also adheres to nationally recognized Uniform Standards of Professional Appraisal Practice (USPAP), ensuring objective, thorough evaluations of aircraft.

Whether serving as an expert witness or giving a buyer a substantiated analysis of a plane, A1Aviation is a trusted resource in the aircraft appraisal industry


About Ivan Leibbrandt



The force behind A1Aviation Group is Ivan Leibbrandt, who brings a robust and knowledgeable background to clients in search of an expert aircraft appraisal.

A native of South Africa with experience as an airline pilot, instructor, and aircraft mechanic, Ivan is a certified appraiser with the National Aircraft Appraisers Association (NAAA). Ivan has worked in aviation for the Air National Guard, Cayman Airways, Branniff, and is currently employed as a Check Airman/Instructor for a major U.S. FAR 121 Flag carrier.

Clients depend on Ivan because of:

  • Nearly 40 years of military, general aviation, and airline experience
  • FAA licensed Airframe & Powerplant (A&P) mechanic
  • 23,000+ flying hours, including J-3 Cub thru 747-400
  • Type-rated in numerous aircraft
  • Certified flight instructor (CFI)
  • Instrument Instructor (CFII)
  • Multi-engine instructor (CFI-ME)
  • ATP rating, commercial helicopter, seaplane
  • Member of NAAA, EAA, AOPA, ALPA, IPA, ALEA, SPA, Alaska Airmen Association, NAFI
  • Experienced in accident investigation
  • Expert witness experience
  • Subject Matter Expert (SME)


Ivan’s work in aviation consulting and appraising spans the globe. He and his family make their home in Central Florida.