Component Repair & Overhaul Management - AMOS Series

Written By EXSYN Aviation Solutions

The CROM Module (Component Repair & Overhaul Management) is a new AMOS module (APN 3075), designed to replace the legacy Component Maintenance (CM) APNs.

The former CM functionality had several structural limitations. CROM introduces a modernized framework fully aligned with AMOS worktemplate logic, offering improved flexibility, control, and integration with existing aircraft maintenance processes.

What’s New?

1. Worktemplate-Based Structure

CROM fully utilizes the standard AMOS worktemplate concept.

Two worktemplate types are applicable:

Shopcards (SH)

  • Executable templates

  • Used to perform the actual component maintenance work

Component Requirements (COR)

  • Non-executable templates

  • Used to define customer or contractual requirements

  • Linked to Shopcards that execute the required work

This separation enables clearer requirement definition and standardized execution.

2. Work Step Phases (Type “C”)

Instead of defining CM task types, CROM uses Work Step Phases, similar to aircraft maintenance logic.

  • Phase Type: “C” (Component-specific)

  • Not mandatory, but recommended for structured process control

This ensures harmonization between aircraft and component maintenance logic.

3. EWI & Digital Signoff Integration

CROM supports:

  • EWI (Electronic Work Instructions)
    When a CMM is linked to a work step.

  • E-Signature functionality
    If configured in:
    APN 10 → Signoff Settings → Configure Signing Events → Component Workpackage (3075)

This enables digital compliance and process traceability.

Work Execution & Control

Component Workpackage (APN 3075)

All component work is managed in:

APN 3075 – Component Workpackage
(Comparable to APN 58 for aircraft workpackages)

Here, users can:

  • Collect required Component Requirements (COR)

  • Assign linked Shopcards

  • Control execution and signoff

  • Monitor progress

Each accomplished Shopcard automatically generates a corresponding Workorder, following the same logic as aircraft workpackages.

Capability & Condition Validation

CROM includes built-in validation mechanisms:

Shop Capability Validation

Before execution, AMOS verifies:

  • Shop capability setup

  • Validity of capability

  • Required approval configuration

If capability is missing or invalid, the workpackage cannot be released.

Component Condition Validation

Validation is performed against the required component condition defined in APN 18 – Condition

This ensures that maintenance is only performed within approved shop and condition parameters.

Component Planning (New APN 3508)

A new planning functionality has been introduced:

APN 3508 – Component Planning

This module allows planning of upcoming component maintenance:

  • Based on part requirements

  • Based on part requests

  • Even while the component is still installed on aircraft

This enables proactive component maintenance forecasting and workload preparation.

Key Benefits

  • Full alignment with AMOS worktemplate philosophy

  • Clear separation between requirements and execution

  • Digital process support (EWI + e-signature)

  • Built-in capability and condition validation

  • Integrated workorder generation

  • Improved component maintenance planning

CROM modernizes component overhaul management and brings it to the same structural level as aircraft maintenance within AMOS.

EXSYN Aviation Solutions
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