DJ's Aviation Company

Market Analysis Grading Instructions Experimental Aircraft

To achieve the most accurate estimate of the aircraft's value it is important that the data be as complete and accurate as possible. Deviations from the following grading instructions will distort the value computation so follow the guidelines for assessing the various "Conditions" carefully.

Airframe Grading Instructions (Homebuilt, Sport & Experimental Aircraft)

  • Excellent:
    Structural exterior surfaces are flawless. External surfaces (aluminum, epoxy, wood and fabric) are wrinkle, crease and blemish free. Rivet, stitch or glue lines are straight and even. Rivets are pulled evenly. There is no evidence of any abnormalities and in every sense of the word the aircraft is in flawless, brand new condition with absolutely no damage history.

  • Very Good:
    Exterior surfaces are almost flawless. The aircraft has no skin or structural repairs and no damage history. Aircraft total time for year, make and model are considered low time.

  • Good:
    Airframe shows very well with a few areas of minor dents or deformations. Airframe is corrosion free, however it may have had minor surface corrosion which has been repaired and corrosion treated. Cowling fasteners may show wear, along with inspection panels, door and cargo door entry areas. Any repairs to airframe were accomplished in a manner which are undetectable and the only physical evidence of repairs are log entries and FAA Form 337Æs. Any damage history would not have involved major structural components of the airframe (wing spar, etc.). Any hail damage would have been repaired in a manner which is undetectable.

  • Average:
    The airframe will be structurally sound. The leading edges may show evidence of abrasion wear. The surfaces under the wings, fuselage and gear may show some evidence of nicks and abnormalities from prop slung pebbles, etc. Minor surface corrosion may be evident on external surface which can easily be repaired by stripping, chemically treating and repainting the affected areas. The exterior surfaces may show minor hail damage which would not be noticeable within 20 feet of the aircraft. Aircraft may have sustained damage, but has been repaired in a manner which is consistent with factory recommendations and procedures for repair. Airframe may have one or two small cracks which need to be stop drilled. Overall there may be some hangar rash type of discrepancies on the airframe which do not need to be repaired and do not affect the safety or flight performance of the aircraft. The overall appearance of the airframe is good.

  • Poor:
    The airframe is in poor condition and would require maintenance before the aircraft could pass an Annual Inspection. The aircraft has deteriorated to a point that continued service would be unwise.