Aircraft Sheet Metal Patch Repair Procedure

The resources and approved data vary by aircraft and operation but generally include the manufacturer s structural repair manual maintenance manual and ac.

Aircraft sheet metal patch repair procedure. Maintain the original strength. It is directly applicable to the repair being made. Stop drill the crack ends with a no. Fabricate a doubler of the same material but one size thicker than the part being repaired.

Control parts wing covering or similar parts of the aircraft. Sometimes the experience to achieve the desirable results can be costly. Attach the doubler to the part with clamps and drill holes. When repair of a damaged part is possible first study the part carefully to fully understand its purpose or function.

The repair data may also be used as approved data and the ac chapter page and paragraph listed in block 8 of faa form 337 when. The primary objective of aircraft repair is to restore damaged parts to their original condition. Removal of rivet heads with a cold chisel and hammer is not recommended because skin damage and distorted rivet holes will probably result. Basic principles of sheet metal repair.

September 1994 subcourse overview this subcourse is designed to provide you with a general familiarization of the airframe of today s aircraft and repair procedures. The user has determined that it is appropriate to the product being repaired. If the rivet is too long the formed head will be too large or the rivet may bend or. Maximum rivet diameter is three times the thickness of the thickest sheet to be riveted.

The art of sheet metal repair. The doubler should be of a. The proper length of rivet is an important part of the repair. Maintain the original strength.

Cut out a circular patch from a sheet of aluminum that is the same thickness and the original aircraft skin. Minimum rivet diameter is equal to the thickness of the thickest sheet to be riveted. In spect rivet joints adjacent to damaged structure for partial failure by removing one or more. Debur the outer edge of the patch.

It is not contrary to manufacturer s data. Supported metal skin support the sheet metal on the inside with a bucking bar. Aircraft sheet metal work prem mahendranathan structural repair. Sheet metal fabrication is considered a blend of art and science requiring finesse to achieve desirable results.

Principal requirements in repair of structures inspection of the damage and accurate estimate of the type of repair required important steps in repairing structural damage. The diameter will depend on the number of rows of rivets you re planning on installing.