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nd
Edition – Rev 0
51-20
DAMAGE CLASSIFICATION AND REPAIRS - GENERAL
STEP 2: DAMAGE EVALUATION
Foreword
After locating and identifying the area of damage, the damage must be evaluated on the
basis of allowed repairs addressed on Pages Block 200 (Maintenance Practices) of this
Chapter: all repairs not reported in this Manual are not allowed.
In these cases contact manufacturer who will indicate repair method or instruction for
structural component replacement.
Primary structural components
Damage to primary structure must be referred to the manufacturer.
Secondary and tertiary structural components
Damage to secondary and tertiary metal structure must be referred to the manufacturer.
Damage on secondary and tertiary structural composite components may be corrected
by a simple corrective action procedure, such as stop drilling cracks, but consideration
should be given to the economic viability of repair or replacement of the components.
If the damage is outside the allowed repair procedures addressed on Pages Block 200
(Maintenance Practices) it must be referred to the manufacturer.
In event of more than one damage close to a structural member, this case must be
referred to the manufacturer.
For the removal and installation procedures for components refer to the appropriate
Chapter of this Manual.
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