TM 1-1520-238-23
2-423
2.117.
CLASSIFICATION OF WING DAMAGE AND TYPES OF REPAIR
2.117.1. Description
This task covers:
Damage Limit Categories. Types Of Damage (Examples): Limits and Action. Corrosion. Impact
or Fatigue Damage.
2.117.2. Damage Limits Categories
The following damage categories help you establish repairable limits for particular areas and parts. Only applicable
categories are listed 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
2.117.3. 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 area
with no affect on adjacent structure.
Patch repair (TM 1-1500-204-23) not to
exceed 25 percent of total panel area.
C
More than 50 percent of panel skin
thickness.
Replace affected area with patch repair
(TM 1-1500-204-23).
b. Type: Skin or Sheet Metal Holes, Cracks, or Tears
A
---
---
B
---
---
C
No cracks or tears more than 25 percent
of shortest skin panel dimension. 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).
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