TM 1-1520-238-23
Change 2
2-37
2.12.
CLASSIFICATION OF FUSELAGE DAMAGE AND TYPES OF REPAIR
2.12.1. Description
This task covers:
Damage Limits Categories. Types of Damage (Examples): Limits and Action. Corrosion. Impact
or Fatigue Damage. Abrasion Damage.
2.12.2. Damage Limits Categories
The following damage limits categories are assigned to help you establish repairable limits for particular areas and
parts. Applicable categories are listed only for a damaged area or part.
Category
Description
A
Negligible damage to be repaired at first opportunity
B
Minor damage requiring immediate action with temporary repair
C
Major damage requiring immediate repair/replacement
2.12.3. Types of Damage (Examples): Limits and Action
Category
Limits
Action
a. Type:
Skin Corrosion
A
Less than 20 PERCENT of skin thickness
and no more than 25 PERCENT of panel
area.
Remove corrosion (para 1.49).
B
More than 20 PERCENT of skin thickness
and less than 50 PERCENT of panel with
no effect on adjacent structure.
Patch repair (TM 1-1500-204-23) not to
exceed 25 PERCENT of total panel.
C
More than 50 PERCENT of skin
thickness.
Replace affected area with patch repair
(TM 1-1500-204-23).
b. Type:
Skin or Sheet Metal Holes, Cracks, or Tears
A
No negligible limits allowed.
-------
B
No minor limits allowed.
-------
C
No cracks or tears more than 25
PERCENT of shortest skin panel
dimension.
Clean up and patch repair
(TM 1-1500-204-23).
No holes greater than 3.00 INCHES
diameter (clean up can be no closer than
2.00 INCHES to support structure).
Clean up and patch repair
(TM 1-1500-204-23).
GO TO NEXT PAGE
