Significant modifications or repairs to over 25kg aircraft need to be notified to the LMA and inspected by an LMA inspector. Witnessed test flights will normally be needed when the modification or repair is completed.

If your aircraft needs a significant repair, please notify the LMA by completing the form below before starting work so an inspector can be appointed.

Significant modifications or repairs are-

• Any change or repair to the load bearing primary structure
• Any change or repair to the load bearing secondary structure larger than 100mm in any direction
• Any change or repair that will change the MTOM by more than 5%
• A change to the radio control system that is not a functionally like-for-like replacement
• An introduction of new control system functionality (such as installing a gyro stabilisation system)
• A change to the powerplant or fuel system that is not a like-for-like replacement
• If fabric covered, replacement of more than 25% of the covering