Bulk Cargo and ULD Handling for Air Cargo Operations: Load Planning, Restraint, and Ramp Control Guide

Bulk cargo and Unit Load Device handling links warehouse preparation with aircraft structural limits, weight and balance, restraint, ground equipment, and flight release. A shipment can be acceptable for air transport but unsuitable for a particular aircraft position, ULD contour, or loading sequence. Operators therefore need coordinated control from cargo acceptance through unloading. For multi-station operations, Just Aviation can receive the operator’s cargo requirements as one coordination point and arrange the relevant handlers, specialist facilities, ULD support, ground equipment, and local operational contacts.

Key Takeaways

• How should cargo loadability be confirmed before build-up?
• When should freight be bulk loaded or assigned to a ULD?
• Which aircraft limits control cargo and ULD positioning?
• How should ULD build-up, certification, condition, and restraint be controlled?
• How do special cargo, dangerous goods, GSE, security data, and load control affect aircraft release?

1. How Should Cargo Acceptance Establish Loadability?

Cargo acceptance establishes whether a shipment is ready to enter the planned air transport process. The review covers shipment description, actual weight, dimensions, piece count, packaging condition, destination, security status, and applicable special-handling codes. Cargo requiring controlled temperature, ventilation, additional security, dangerous goods procedures, unusual orientation, or specialist lifting should be identified at this stage.

Acceptance is separate from aircraft loadability. A shipment accepted into the cargo system still requires aircraft compatibility assessment before loading. The 2026 IATA Cargo Handling Manual, Edition 10, covers this operating chain from shipment preparation and acceptance through aircraft dispatch and destination handover.

2. When Should Cargo Be Bulk Loaded or Assigned to a ULD?

Bulk cargo consists of individual pieces loaded directly into an approved aircraft compartment. The compartment structure and approved restraint arrangement control the load during flight. ULD cargo is consolidated into an aircraft container or onto an aircraft pallet with a compatible pallet net before aircraft loading. IATA defines an aircraft ULD as an aircraft container or an aircraft pallet and pallet net used to group and restrain cargo, mail, or baggage.

The loading method is selected according to aircraft configuration, shipment dimensions, cargo characteristics, available ULD types, loading equipment, compartment access, and turnaround requirements. This decision should be resolved before warehouse build-up begins.

3. Which Aircraft Limits Control Cargo Positioning?

Aircraft structural and loading limits determine where cargo can be placed. The applicable Weight and Balance Manual, loading manual, Cargo Loading System data, and operator procedures provide the controlling values for the aircraft configuration.

Relevant controls include compartment maximum weight, individual position limits, floor loading, point loading, linear or area loading, ULD position center of gravity, aircraft center of gravity, contour restrictions, and adjacent-position limitations. FAA AC 120-85B notes that an authorized ULD still has to comply with the aircraft Weight and Balance Manual and Cargo Loading System requirements. A ULD’s own structural capability therefore does not establish suitability for every aircraft position.

4. How Should the Aircraft Load Plan Be Developed?

Load planning converts accepted freight into a configuration that meets aircraft structural, balance, and operational requirements. Bulk cargo is assigned to approved compartments, while ULDs are allocated to compatible loading positions.

The planner also considers destination sequence, through cargo, intermediate stops, unloading access, special cargo requirements, and aircraft turnaround priorities. Cargo for an earlier station should remain accessible without unnecessary movement of through freight. Once approved, the loading instruction becomes the controlling reference for the ramp team. A change involving position, ULD, weight, or offload status should be returned to load control before the physical aircraft configuration is changed.

5. How Should the Correct ULD Be Selected?

ULD selection begins with aircraft compatibility rather than warehouse availability. The unit should match the required type, contour, aircraft loading system, planned cargo, and approved operating configuration. Its identification markings should also remain legible for tracking and load-control purposes.

The 2026 IATA ULD Regulations, Edition 14, include updated aircraft contour information and a consolidated compatibility table for aircraft pallets and pallet nets. The edition also introduces additional contour information supporting newer aircraft configurations. Selecting the correct ULD before build-up reduces rebuilds caused by contour conflicts, incorrect pallet-net combinations, or incompatibility with the assigned aircraft position.

6. How Should ULD Build-Up Be Controlled?

ULD build-up determines how individual shipments are arranged inside a container or on a pallet. Cargo should remain within the approved contour while maintaining suitable distribution across the ULD structure.

Heavy pieces require controlled placement to avoid unsuitable concentrated loading. Fragile freight should be protected from surrounding cargo, while orientation-sensitive packages should remain in their required position. Palletized freight should use a compatible pallet and net arrangement.

Once build-up is complete, the ULD is weighed and identified. Its actual gross weight, including tare weight and contents, is then transferred to load control for inclusion in the aircraft loading calculation. Build-up data should not rely on estimated weight where an actual measured weight is available.

7. How Are ULD Certification and Aircraft Approval Different?

ULD certification establishes that the unit meets an approved design and performance standard. Aircraft authorization establishes whether that ULD type is permitted on the specific aircraft and loading system. FAA TSO-C90e is the current FAA Technical Standard Order covering Unit Load Devices. EASA introduced ETSO-C90e, Cargo Pallets, Nets and Containers, through CS-ETSO Amendment 18 on 15 September 2025.

Existing fleets also contain ULDs approved under earlier certification bases. Their continued use depends on the applicable approval, maintenance status, operator procedures, and aircraft Weight and Balance Manual rather than the publication date of the latest certification standard.

8. When Should ULD Serviceability Be Checked?

The primary serviceability inspection should take place while the ULD is empty because several structural components become difficult to inspect after build-up. Inspection areas include the base, frame, edge rails, panels, doors, closures, pallet net, fittings, attachment points, and identification markings according to the applicable maintenance data. Damage should be assessed against the approved Component Maintenance Manual and operational damage limits.

A unit outside the allowable condition is removed from the active loading process and directed to the appropriate repair or disposition channel. Additional condition checks during transfer and unloading help identify damage that occurred after the initial inspection.

9. How Should Bulk Cargo Be Restrained?

Bulk cargo relies directly on the aircraft compartment restraint arrangement. The selected method reflects the cargo mass, shape, compartment configuration, available structural attachment points, and operator loading procedures. Approved restraint can include compartment nets, straps, tie-down equipment, shoring, and other aircraft-specific systems. High-density cargo, wheeled equipment, irregular shapes, and cargo with a high center of gravity require additional attention because their movement characteristics differ from ordinary packages.

Restraint equipment also requires serviceability control. FAA AC 120-85B addresses bulk cargo restraint, cargo loading systems, and procedures for inspecting and removing unsuitable restraint equipment from service.

10. How Should Special Cargo Compatibility Be Planned?

Special cargo should be assessed for compatibility before shipments share a ULD, compartment, or adjacent aircraft position. Temperature-sensitive pharmaceuticals, perishables, live animals, valuables, wet cargo, human remains, and outsized freight have different environmental, security, access, and handling requirements. The 2026 ICHM includes revised segregation guidance and expanded treatment of stackable and unstackable cargo.

For multi-provider movements, the operator can provide Just Aviation with the shipment requirements and operating schedule. Just Aviation can then coordinate the suitable cargo terminal, specialist storage, ramp handler, local transport, and other required station services, returning the confirmed arrangements through one operational contact.

11. How Should Loading Sequence Be Planned?

Loading sequence determines when freight reaches the aircraft and how easily each shipment can be accessed later. The sequence should reflect aircraft balance, destination order, compartment access, cargo characteristics, GSE positioning, and turnaround timing.

Through cargo should not obstruct shipments scheduled for removal at an intermediate station. Temperature-sensitive freight benefits from controlled ramp exposure, while heavy or outsized pieces often need to move earlier because access becomes restricted as loading progresses. The loading sequence should be established before cargo leaves the warehouse. Changes made at the aircraft can affect ramp movement, aircraft position allocation, unloading order, and final load data, so they should be coordinated rather than improvised locally.

12. How Are Dangerous Goods Integrated Into the Load?

Dangerous goods follow an additional regulatory process within the cargo handling chain. ICAO Doc 9284, 2025-2026 Edition, remains applicable through 31 December 2026, with current addenda and corrigenda forming part of the effective instructions.

The 2026 IATA Dangerous Goods Regulations are Edition 67.

Before aircraft loading, applicable packages are checked for condition, markings, labels, documentation, segregation, orientation, and loading restrictions. Consolidating dangerous goods inside a ULD does not remove these controls. The final aircraft position of the dangerous goods should also correspond with the information provided to the pilot-in-command.

13. What Additional Controls Apply to Active and Temperature-Controlled ULDs?

Active ULDs incorporate powered systems such as temperature-control or fire-protection equipment and therefore introduce requirements beyond ordinary containers. FAA AC 120-85B identifies temperature-controlled containers as a common active ULD application and notes their use of batteries, electrical wiring, fans, and related components.

Operational planning should confirm aircraft approval, battery status, charging requirements, operating mode, temperature setting, shipment duration, ground storage, and handling instructions.

The handling team should also distinguish an aircraft ULD from temperature-controlled shipping equipment that does not form part of the aircraft loading and restraint system. The manufacturer’s operating instructions and operator approval basis control how each device is accepted and carried.

14. How Should Cargo GSE Be Matched to the Aircraft and Load?

Cargo Ground Support Equipment provides the physical transfer between warehouse transport, ramp, ULD, and aircraft loading system. Bulk operations use equipment such as belt loaders, while ULD operations rely on dollies, transporters, lower-deck loaders, main-deck loaders, and transfer decks.

The equipment should match ULD dimensions, gross weight, aircraft sill height, deck position, and ramp conditions. Loader alignment also requires adequate clearance from doors, fuselage surfaces, sensors, engines, and surrounding equipment.

Where the mission depends on specialist equipment, Just Aviation can coordinate availability and operating windows with the selected handler or GSE provider before cargo reaches the ramp, including alternate equipment where the station has limited redundancy.

15. What Does the Aircraft Loading Supervisor Control?

The loading supervisor controls the physical execution of the current loading instruction. Before loading begins, the supervisor confirms the aircraft registration, active load plan, compartment condition, assigned positions, and relevant Cargo Loading System status.

During loading, cargo and ULD identification are checked against their allocated locations. Unapproved position changes should be stopped and referred back to load control.

The supervisor does not independently redesign the aircraft load. The role is to ensure the physical configuration corresponds with the authorized loading plan and to report deviations. This separation keeps load planning and ramp execution connected while maintaining clear responsibility for the final aircraft configuration.

16. How Should Final Load Reconciliation Be Completed?

Final load reconciliation establishes what is physically on the aircraft before weight and balance documentation is completed. Load control receives confirmed ULD positions, actual ULD weights, bulk compartment totals, offloads, substitutions, and last-minute cargo changes.

The final configuration should also match dangerous goods information and any other load details supplied to the crew.

Where the ramp configuration differs from the issued loading instruction, the final data should be corrected before flight release rather than carried forward from the original plan. This creates one controlled version of the aircraft load for the flight crew, OCC, load-control function, and post-flight operational record.

17. How Does Preloading Cargo Security Data Affect Operations?

Preloading Advance Cargo Information requirements operate separately from physical cargo loading but can determine whether freight progresses toward carriage.

IATA’s 2026 PLACI Manual, Edition 7, covers advance cargo information regimes in the United States, European Union, United Kingdom, United Arab Emirates, and Canada. The current edition also consolidates carrier-specific data requirements and provides an updated overview of existing PLACI programs.

Cargo information should therefore be available early enough to resolve data or security holds before planned aircraft transfer. A successful security-data filing does not replace cargo acceptance, customs procedures, dangerous goods checks, or aircraft loadability assessment.

18. Which Records Should Follow the Cargo?

The cargo record should provide traceability from acceptance through aircraft departure and destination handover. Depending on the shipment, records include the Air Waybill, cargo manifest, loading instruction, ULD identification, actual weight, dangerous goods documentation, pilot notification, special handling information, and final load-control data.

Operational changes should be captured when they occur rather than reconstructed after departure. The record should identify what was loaded, where it was positioned, which conditions applied, and which changes were accepted before release. This traceability supports discrepancy investigation, cargo claims, dangerous goods review, billing validation, and comparison between planned and completed ground handling activity.

19. How Should ULD Inventory and Custody Be Controlled?

ULD management continues when the unit is not on an aircraft. Operators need visibility of location, ownership, custody, serviceability, repair status, and availability across the network.

The 2026 IATA ULD Regulations cover ULD stock control, transfer receipts, ownership documentation, repair-station records, storage, transport, build-up, break-down, and operating instructions.

Inventory records should distinguish loaded, empty, serviceable, damaged, transferred, and under-repair equipment. Accurate visibility reduces operational shortages caused by equipment being held at another station or remaining unavailable without being reflected in planning systems. ULD custody should be updated whenever responsibility changes between operator, handler, station, or repair organization.

20. What Should Be Checked During Unloading?

Unloading provides the first opportunity to compare the arrived cargo condition with the departure record. Personnel should identify shifted freight, damaged packages, leakage, contamination, ULD distortion, restraint defects, Cargo Loading System damage, missing identification, or cargo located outside its recorded position.

The condition should be documented before affected freight or equipment returns to routine circulation. ULD damage is assessed under the applicable maintenance data, while cargo damage, dangerous goods discrepancies, or aircraft contact are directed into the relevant reporting process. The hold and loading system should also be checked when the observed condition indicates that aircraft equipment requires attention before the next loading cycle.

21. How Should Cargo Disruptions Be Managed?

Cargo disruptions often affect several service providers at the same time. A damaged ULD can require a replacement unit, warehouse rebuild, revised weighing, new loading data, and a changed ramp readiness time. An unavailable loader can affect both cargo transfer and departure sequencing.

The recovery process should identify the controlling problem first, then assign revised actions to the appropriate handler, ULD source, GSE provider, load-control team, and aircraft operation. For coordinated missions, the operator can send the revised requirement to Just Aviation instead of managing each local provider independently. Just Aviation can consolidate the station response and return the revised equipment status, cargo readiness time, and operational dependencies through the same coordination channel.

Practical Operational Scenario: A Pharmaceutical ULD Faces a Ramp Equipment Change at Hong Kong

A temperature-controlled pharmaceutical shipment is scheduled to depart Hong Kong International Airport in a ULD requiring controlled handling from cargo terminal to aircraft. Shortly before ramp transfer, the planned loader becomes unavailable. HKIA has extensive special-cargo infrastructure, and cargo operators at the airport hold certifications including IATA CEIV Pharma. The airport also lists dedicated facilities for pharmaceutical and other special cargo handling.

The operator sends the revised requirement to Just Aviation. Just Aviation coordinates with the cargo terminal to retain the shipment under the required storage condition while an alternative loader is confirmed with the ramp provider. The revised transfer time is then aligned with the handler and aircraft loading sequence.

Because the delay changes ramp exposure and aircraft readiness, the cargo is not released from controlled storage until the substitute equipment and loading window are confirmed. The completed ULD identification, gross weight, and position remain unchanged, so load control retains the planned aircraft configuration while updating the operational readiness time.

Operational lesson: The critical issue is not only whether suitable cargo facilities exist. The warehouse, equipment provider, ramp handler, and aircraft loading sequence need to remain synchronized when one part of the service chain changes.

22. How Should Cargo Handling Performance Be Reviewed?

Post-operation review should focus on recurring operational weaknesses rather than isolated events. Useful indicators include cargo acceptance delays, rebuilds, ULD damage, late weight changes, loading discrepancies, GSE contact events, dangerous goods findings, equipment shortages, and changes made after cargo reaches the ramp.

Patterns can identify problems in warehouse preparation, station equipment, training, provider communication, load planning, or data quality. Corrective action should be directed to the process that created the discrepancy. The 2026 ICHM includes guidance on an operational contingency framework, supporting a more structured approach to disruption readiness and recovery across cargo operations.

How Just Aviation Coordinates Bulk Cargo and ULD Operations

Just Aviation provides operators with one coordination point for cargo services that involve several stations or local providers. Based on the operator’s requirements, coordination can cover cargo handlers, specialist storage, ULD availability, GSE, ramp services, special cargo facilities, local transport, and other station support.

The role is to connect these services into one operational plan and maintain communication when timing, equipment, cargo condition, or aircraft requirements change. Technical acceptance, dangerous goods classification, aircraft load control, certification, and other regulated decisions remain with the appropriately qualified operator, shipper, handler, or responsible authority.

Contact the Just Aviation Operations Control Center at [email protected] for 24/7 coordination of international cargo handling, ULD requirements, special cargo, ground support equipment, and aircraft loading services.

Frequently Asked Questions About Bulk Cargo and ULD Handling

1. What is the difference between bulk cargo and ULD cargo?

Bulk cargo is loaded as individual pieces directly into an approved aircraft compartment. ULD cargo is consolidated inside an aircraft container or onto a compatible aircraft pallet and pallet net before loading.

2. Does cargo acceptance confirm that the shipment can be loaded on the planned aircraft?

No. Acceptance establishes whether the shipment is ready for the cargo process. Aircraft loadability still depends on structural limits, available positions, dimensions, loading-system compatibility, restraint, balance, and aircraft configuration.

3. Can the same ULD type be used in every aircraft position?

No. Aircraft position, contour, ULD type, Cargo Loading System, gross weight, and aircraft approval data determine where a specific ULD can be used.

4. When should ULD serviceability be assessed?

A detailed inspection is performed before build-up while major structural areas remain visible. Additional checks during handling help identify damage that develops later in the ULD cycle.

5. What are the current ULD certification references?

FAA TSO-C90e is the current FAA standard for ULDs. EASA introduced ETSO-C90e in September 2025 for cargo pallets, nets, and containers under its current certification specification.

6. Can a certified and serviceable ULD still be unsuitable for loading?

Yes. Certification and serviceability do not replace aircraft compatibility. The assigned aircraft position and Cargo Loading System still have to support the ULD type, contour, weight, and configuration.

7. Why does loading sequence matter?

Loading sequence affects access to intermediate-stop cargo, aircraft balance, ramp movement, special cargo exposure, equipment positioning, and unloading efficiency at destination.

8. Do dangerous goods requirements change when the packages are inside a ULD?

No. Applicable package condition, markings, labels, segregation, documentation, loading restrictions, and pilot-information requirements remain in effect after consolidation.

9. What is PLACI?

Preloading Advance Cargo Information is shipment data submitted under applicable security regimes before cargo loading or movement. Requirements differ by jurisdiction and are separate from physical cargo acceptance and aircraft loading controls.

10. Why is ULD inventory tracking important?

Inventory control identifies ULD location, custody, condition, and operational availability. This supports planning and reduces equipment shortages caused by units being held, transferred, damaged, or under repair elsewhere.

11. Which current references support cargo and ULD operations in 2026?

Relevant references include operator-approved aircraft and cargo manuals, IATA ULDR Edition 14, ICHM Edition 10, IATA DGR Edition 67, PLACI Edition 7, FAA AC 120-85B, ICAO Doc 9284, and applicable FAA TSO or EASA ETSO standards.

Disclaimer

Cargo loading, ULD certification, dangerous goods, special cargo, cargo security, restraint, weight and balance, and ground handling requirements depend on the aircraft, operator, State, shipment, and equipment used. Operators should verify current approved manuals, aircraft limitations, regulatory publications, and applicable handling procedures before each operation.

Conclusion

Bulk cargo and ULD handling connects shipment acceptance, aircraft compatibility, ULD preparation, restraint, loading equipment, and final load control. Each stage manages a different operational risk and should provide accurate information to the next function. Special cargo, dangerous goods, security data, equipment condition, and ULD custody require separate controls within the same cargo chain. Clear responsibilities and coordinated provider management help reduce rebuilds, loading discrepancies, equipment conflicts, cargo damage, and avoidable turnaround disruption while keeping the final aircraft configuration aligned with approved operating data.