Opinion: Entry into service is the most underestimated phase of business aircraft ownership
May 4, 2026
Derek Holter is Vice President of Operations at ACASS, with extensive experience in aircraft management, charter operations and flight dispatch across the business aviation sector. Having progressed from Director of Aircraft Management, he now oversees operational readiness, regulatory compliance and resource planning, with a particular focus on entry into service and the coordination of complex aircraft transactions.
Entry into service: The most underestimated phase of business aircraft ownership
In business aviation, delivery day often captures the spotlight. The aircraft is accepted, ownership transfers, and the expectation is that operations can begin immediately. Yet for experienced owners, operators, and advisors, delivery is only one milestone. The far more consequential stage is what comes next: Entry into Service (EIS).
EIS is the process of converting a newly acquired aircraft into a fully operational, compliant, and owner-ready asset. It is where regulatory planning, operational readiness, technical execution, and timeline management converge. And despite its importance, it remains one of the most underestimated phases of aircraft ownership.
Why entry into service (EIS) is the most complex phase of aircraft ownership
It is fair to say the most complex phase of ownership frequently occurs before the aircraft ever flies for its new owner.
That complexity does not usually stem from one major obstacle, but from the number of moving parts that must align simultaneously. Regulatory approvals, crew readiness, insurance activation, maintenance planning, aircraft registration, documentation, and vendor onboarding each operate on separate timelines – often controlled by different third parties.
A modern EIS can involve coordination among civil aviation authorities, training providers, maintenance organisations, legal counsel, management companies, banks, insurers, and OEM support teams. In many transactions, more than a dozen stakeholders may influence readiness.
The challenge is not simply completing tasks. It is synchronising interdependent tasks within a fixed deadline.
Aircraft delivery vs operational readiness: Understanding entry into service
One of the most common misconceptions among first-time buyers is equating aircraft delivery with operational readiness.
Delivery is the transfer of ownership. Entry into Service (EIS) is the process of ensuring the aircraft can legally and efficiently operate under its intended mission profile.
That includes, but is not limited to, crew hiring, training, and regulatory qualification; inclusion under the operator’s certificate where applicable; operational approvals; insurance compliance; maintenance programme integration, aircraft manuals and procedures; vendor account setup and payment systems and cabin readiness and owner-specific standards.
An aircraft can be physically delivered yet remain unavailable for use if any of these elements are incomplete.
Aircraft registry selection and its long-term impact on operations
Among the most important decisions in EIS is the aircraft registry.
Whether an aircraft is placed on a U.S., Canadian, Irish, Cayman, San Marino, Isle of Man, or another registry can materially affect the operating model. Registry selection influences regulatory oversight, documentation requirements, maintenance compliance, crew licensing acceptance, operational flexibility, and timing.
Changing registry later is often far more disruptive than many anticipate.
A re-registration may require new registration markings and placards, emergency equipment reprogramming, certificate reissuance, manual revisions, crew licence validations or conversions, review of supplemental type certificates (STCs), re-entry into a new operating certificate, and temporary grounding during the transition period.
What appears to be an administrative decision at acquisition can become a costly operational event later.
Common entry into service delays: Approvals, training and supply chain challenges
Although technical findings can affect schedules, many EIS delays arise elsewhere.
- Regulatory approvals: Final operating approvals frequently create the most pressure because they are often the last step before release to service. Owners waiting to begin operations naturally focus attention here.
- Documentation gaps: Late or incomplete submissions, outdated manuals, or discrepancies in records can delay authority reviews and vendor onboarding.
- Crew training constraints: Simulator availability continues to be a bottleneck in parts of the market, particularly for in-demand long-range aircraft such as the Bombardier Global 7500, Gulfstream G650, and Dassault Falcon 8X. Without confirmed training slots, aircraft readiness can outpace crew readiness.
- Maintenance and supply chain issues: Upcoming inspections, deferred maintenance items, and parts delays can quickly alter schedules, especially if discovered late in the process.
- Financial and compliance onboarding: Fuel cards, trip support providers, and payment systems increasingly require detailed Know Your Customer (KYC) reviews that can take longer than expected.
Crew planning and pilot availability
Crew remains one of the most critical components of EIS.
Hiring too late can leave a ready aircraft without qualified pilots. Hiring too early can create unnecessary costs if the aircraft timeline slips.
The best approach is to align crew recruitment and training with realistic delivery forecasts, training centre capacity, and regulatory requirements. For many acquisitions, particularly larger-cabin aircraft, pilot sourcing should begin months before expected delivery.
In a competitive labour market, qualified flight crews are not always immediately available.
Key entry into service decisions that shape long-term aircraft operations
The early choices with the greatest long-term impact are typically those that are difficult or costly to reverse later. These include the aircraft registry and operating structure, the decision between private or commercial use, management company selection, maintenance programme strategy, crew quality and retention planning, and mission-specific cabin and operating standards.
Strong decisions made at the outset help reduce friction throughout the ownership cycle, while poor early choices often reappear later as recurring costs, operational downtime, or ongoing inefficiencies.
The industry still too often views entry into service as a checklist to complete after delivery.
EIS is a strategic project management discipline requiring experience, sequencing, contingency planning, and current market awareness. Supply chain volatility, training capacity constraints, labour shortages, and increasingly complex ownership structures have only increased the need for proactive planning.
When managed well, owners experience a seamless first flight and assume everything was straightforward.
When managed poorly, the aircraft is delivered – but not truly ready.
How entry into service shapes aircraft performance from day one
Business aircraft ownership begins long before the first trip. Entry Into Service is the phase where planning becomes reality and expectations are either met or missed.
For owners making significant capital commitments, EIS should not be treated as a back-office process. It is the bridge between acquisition and value realisation – and one of the clearest determinants of whether a new aircraft delivers on day one or disappoints from the start.
