TM 1-1520-238-23
13-4
SECTION I.
ENVIRONMENTAL CONTROL SYSTEM MAINTENANCE
13.1.
ENVIRONMENTAL CONTROL SYSTEM (ECS) INSPECTION
13.1.1. Description
This task covers:
Inspection.
13.1.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Materials/Parts:
Tape (item 200, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1500-204-23
TM 55-1500-323-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
13.1.3. Inspection
a. Check tubes for chafing, cracks, or nicks. Replace damaged tubing.
b. Check ducts for chafing, cracks, dents, nicks, or scratches. Replace damaged ducting. If duct is not
damaged and is chafing on components, install tape to protect duct (para 13.28).
c. Check duct cuffs and insulation for chafing, cracks, or tears. Replace damaged cuffs or insulation.
(1) Chafing between cuffs and insulation and other components is allowed if insulation compression does not
exceed 0.25 INCHES.
(2) Repair tears on insulation. Use tape (item 200, App F).
(3) Repair tears on cuffs less than 1 INCH. Use tape (item 200, App F).
d. Check ECS ducts for air leaks.
e. Check rubber seals for chafing, cuts, or fraying. Replace damaged seals (para 13.29).
f. Check clamps for security, wear, and cracks which can chafe and damage ducts. Replace damaged
clamps.
g. Check nutplates for loose rivets and stripped or damaged threads (TM 1-1500-204-23).
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