7.8.4 Aluminium and Alloys

All components: Aluminium oxides present in the environment, typically associated with silicon (dirt) contamination.

Reciprocating engine: Pistons; bearings; bushing; blocks; main and accessory cases and housings; some oil cooler tubing.

Turbine engine:
Main and accessory case, housing; some retainers; seals; baffles.

Transmission: Some cases; bushing and retainers.

Torque converter: Impellers. Differential: Bushing and thrust washers.

Final drive/reduction gearbox: Bushing and thrust washers.

Hydraulic:
Some pump housings.

Compressors:
Case; impellers, some pistons and crossheads; retainers.
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