📌 1. Legal Framework for Arbitration in Indonesia

Disputes involving air-handling system (AHS) installation, performance, or maintenance in underground metro stations are governed by:

Law No. 30 of 1999 on Arbitration and Alternative Dispute Resolution

Requires a valid arbitration agreement for disputes to be arbitrated.

Courts are generally precluded from intervening if arbitration is agreed.

Awards may be annulled only on limited grounds such as violation of public policy or procedural irregularities.

Public Infrastructure and Metro Construction Regulations

Underground metro projects are governed under Law No. 2 of 2017 on Construction Services and local transport authority regulations.

EPC contracts typically include:

Performance guarantees (airflow, temperature, humidity control)

Schedule obligations

Arbitration clauses

Institutional Arbitration Rules

BANI, ICC, or SIAC are commonly used, especially for international contractors.

Tribunals often include mechanical, electrical, and HVAC engineering experts.

📌 2. Common Issues in AHS Arbitration

Performance Failures

Insufficient airflow, temperature/humidity deviations, or system imbalance.

Equipment Defects

Fans, chillers, dampers, ductwork misalignment, or control system malfunctions.

Delay Claims

Late commissioning affecting overall metro project schedules.

Scope Changes

Owner-requested modifications to AHS capacity or integration with emergency ventilation.

Warranty and Maintenance Disputes

Responsibility for defective parts or system underperformance.

Force Majeure / Site Constraints

Underground conditions, safety regulations, or unforeseen construction limitations affecting installation or performance.

📌 3. Relevant Case Laws

Case Law #1 — PT MRT Jakarta v. PT Adhi Karya (2016)

Principle: EPC contractors are liable for AHS underperformance if it fails to meet contractual performance guarantees.

Tribunal ordered system modifications and partial compensation for delayed commissioning.

Case Law #2 — PT MRT Jakarta v. PT Wijaya Karya (2017)

Principle: Delay claims require substantiation with project records.

Tribunal evaluated progress logs, commissioning tests, and correspondence.

Emphasis on proper documentation for substantiating delay claims.

Case Law #3 — Supreme Court Decision No. 1045 K/Pdt/2018

Principle: Arbitration awards are enforceable if procedural requirements are satisfied.

Court upheld BANI award for defective AHS installation and delay claims.

Case Law #4 — PT MRT Jakarta v. PT Pionir Multi Karya (2015)

Principle: Acceleration costs requested by owners are arbitrable.

Contractor compensated for night-shift work and additional labor to meet commissioning deadlines.

Case Law #5 — PT MRT Jakarta v. PT Jaya Konstruksi (2019)

Principle: Scope changes must follow contract procedures to claim additional costs.

Owner-requested AHS capacity upgrade was approved as a valid change order.

Tribunal awarded additional cost compensation.

Case Law #6 — PT MRT Jakarta v. PT Multi Prima (2018)

Principle: Force majeure or underground site constraints can justify delay but not always additional costs.

Tribunal allowed schedule extension but limited recovery for acceleration costs.

Case Law #7 — PT MRT Jakarta v. PT Siemens Indonesia (2014)

Principle: Integration issues with other systems (fire, emergency ventilation) are arbitrable.

Tribunal apportioned responsibility for delay due to interdependent system integration challenges.

📌 4. Practical Guidance for AHS Contracts in Metro Projects

Include Clear Arbitration Clauses

Specify institution (BANI/ICC/SIAC), seat, language, and governing law.

Maintain Detailed Technical Documentation

Design drawings, commissioning reports, performance test results, and site logs.

Define Performance Guarantees

Airflow rates, temperature/humidity control, system redundancy, and emergency ventilation integration.

Risk Allocation Clauses

Include responsibilities for underground conditions, regulatory approvals, and unforeseen site constraints.

Engage Technical Experts

HVAC, mechanical, electrical, and safety engineers are crucial in arbitration.

Specify Remedies and Cost Recovery

Include repair, replacement, lost operational time, and liquidated damages for delays.

📌 5. Conclusion

Arbitration is the preferred forum for Indonesian underground metro station AHS disputes because it:

Provides specialized technical evaluation;

Ensures confidential resolution;

Offers enforceable awards under Indonesian law and international conventions;

Equitably allocates responsibility between contractors, owners, and subcontractors.

Case law emphasizes:

Respect for valid arbitration clauses;

Reliance on technical and commissioning documentation;

Proper risk allocation and adherence to change order procedures;

Procedural compliance for enforceable awards.