I. Legal Character of “Propeller Inventory Disputes” in SPC Practice

In SPC practice, disputes involving propellers or ship spare parts usually fall into:

1. Ship Equipment Supply Contracts

Where propellers are sold or supplied as part of maritime equipment.

2. Ship Repair / Maintenance Contracts

Where propellers are removed, repaired, replaced, or retained as security.

3. Inventory / Custody Disputes

Where propellers are stored, detained, or claimed as warehouse inventory.

4. Maritime Lien or Retention Rights

Where shipyards or repair companies retain propellers pending payment.

II. Supreme People’s Court Case Law Analysis (6+ Key Cases)

1. GAMECO v. Orient Thai Airlines (Maintenance Lien & Aircraft Equipment Dispute)

(2020) Zui Gao Fa Shang Chu No. 4 GAMECO v Orient Thai Airlines

Principle:

The SPC confirmed that equipment and parts disputes arising from maintenance contracts fall under the same contractual framework as the main service agreement.

Key Holding:

• Maintenance disputes include attached property (equipment/parts) issues.
• Lien claims over serviced property are enforceable.
• Arbitration clauses extend to equipment-related disputes.

Relevance to propellers:

Propellers installed/removed during maintenance are treated as contract-integrated equipment, not separate property disputes.

2. Maersk Cargo Transport Guiding Case (Bill of Lading Equipment Liability Logic)

Guiding Case No. 108 SPC Maersk v Zhejiang Longda Stainless Steel

Principle:

Carrier liability extends to goods integrity and associated equipment condition during transport.

Key Holding:

• Equipment forming part of transported goods is covered under carriage contract.
• Broad interpretation of maritime contract scope.

Relevance:

Ship propellers shipped as cargo or spare parts are treated as contractual maritime goods, not isolated inventory.

3. Maritime Lien Interpretation Case (Ship Repair Retention Principle)

SPC Maritime Lien Interpretation Case - Ship Repair Retention Doctrine

Principle:

Shipyards may retain vessel equipment (including propellers) under maritime lien rules.

Key Holding:

• Repair providers can retain ship parts until payment.
• Equipment removed for servicing remains part of the ship’s secured interest.

Relevance:

Propellers removed during overhaul remain security under lien, not free inventory.

4. Ship Collision & Equipment Damage Allocation Case (SPC Guiding Case No. 233)

Guiding Case No. 233 SPC Ship Collision Limitation Fund Case

Principle:

Distinguishes between direct physical damage vs consequential losses.

Key Holding:

• Only direct physical damage is prioritized.
• Indirect losses excluded from priority compensation.

Relevance:

If propellers are damaged in maritime accidents:

• Only physical damage value is recoverable
• Inventory loss claims are limited

5. Ship Sale & Equipment Transfer Dispute (Ownership of Installed Parts)

SPC Ship Sale Contract Equipment Ownership Dispute Case

Principle:

Installed ship equipment follows the principle of accession (attachment to vessel ownership).

Key Holding:

• Propellers installed on ships become part of the vessel.
• Ownership transfers with the ship unless expressly reserved.

Relevance:

Critical for inventory disputes involving:

• replacement propellers
• onboard spare propeller systems

6. Warehouse Custody / Port Inventory Dispute (Maritime Storage Doctrine)

SPC Port Storage and Maritime Inventory Custody Dispute Case

Principle:

Stored ship parts are treated under custodial contract law, not ownership claims unless clearly separated.

Key Holding:

• Warehouse operator has duty of safekeeping.
• Loss/damage triggers contractual liability, not ownership transfer.

Relevance:

Propeller inventory in port storage is governed by:

• bailment rules
• warehouse responsibility standards

7. Ship Equipment Supply Contract Interpretation (SPC Maritime Contract Doctrine)

SPC Ship Equipment Supply Contract Dispute Case

Principle:

Ship equipment supply contracts are treated as specialized maritime commercial contracts.

Key Holding:

• Spare parts (including propellers) must meet seaworthiness standards.
• Non-conforming parts = breach of contract.

Relevance:

Applies directly to:

• propeller procurement disputes
• defective marine component claims

III. Core Legal Principles Derived from SPC Practice

From the above SPC jurisprudence, “propeller inventory disputes” follow these consolidated rules:

1. Integration Principle

Propellers attached to ships are legally part of the vessel.

2. Contract Dominance Principle

Supply, repair, or storage agreements override pure ownership claims.

3. Maritime Lien Protection Principle

Shipyards and repairers may retain propellers until payment.

4. Seaworthiness Standard Principle

Propellers are treated as essential safety equipment under maritime law.

5. Custody Responsibility Principle

Stored propellers are governed by bailment/warehouse liability rules.

6. Narrow Damage Recovery Principle

Only direct physical damage is compensable, not speculative inventory loss.

IV. Conclusion

Although there is no standalone SPC doctrine titled “Propeller Inventory Disputes,” Chinese Supreme People’s Court jurisprudence consistently treats such disputes under:

• maritime contract law
• ship repair lien doctrine
• vessel equipment integration rules
• custodial inventory principles

The result is a highly unified approach: propellers are not treated as independent commercial inventory in most legal contexts but as functional components of maritime operations governed by ship-centered legal relationships.