Cut out a circular patch from a sheet of aluminum that is the same thickness and the original aircraft skin.
Aircraft sheet metal patch repair procedure.
Minimum rivet diameter is equal to the thickness of the thickest sheet to be riveted.
It is directly applicable to the repair being made.
Removal of rivet heads with a cold chisel and hammer is not recommended because skin damage and distorted rivet holes will probably result.
Fabricate a doubler of the same material but one size thicker than the part being repaired.
Sheet metal fabrication is considered a blend of art and science requiring finesse to achieve desirable results.
The patch plate should have a cross sectional area equal to or greater than that of the original damage.
The doubler should be of a.
Stop drill the crack ends with a no.
When repair of a damaged part is possible first study the part carefully to fully understand its purpose or function.
The diameter will depend on the number of rows of rivets you re planning on installing.
Maintain the original strength.
The art of sheet metal repair.
The proper length of rivet is an important part of the repair.
The primary objective of aircraft repair is to restore damaged parts to their original condition.
It is not contrary to manufacturer s data.
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.
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.
Aircraft sheet metal work prem mahendranathan structural repair.
Basic airframe repair subcourse number al0992 edition a us army aviation logistics school fort eustis virginia 23604 5439 4 credit hours edition date.
Control parts wing covering or similar parts of the aircraft.
Basic principles of sheet metal repair.
The resources and approved data vary by aircraft and operation but generally include the manufacturer s structural repair manual maintenance manual and ac.
The user has determined that it is appropriate to the product being repaired.
In spect rivet joints adjacent to damaged structure for partial failure by removing one or more.
Debur the outer edge of the patch.
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.
Maximum rivet diameter is three times the thickness of the thickest sheet to be riveted.
Place a splice where the member is.
Supported metal skin support the sheet metal on the inside with a bucking bar.
Maintain the original strength.
