SARAH MESPELT LARRANAGA
AIRCRAFT INTERIOR DESIGN
ACCEPTANCE & DELIVERY
AIRCRAFT OUTFITTING
COMPLETION CONTRACTS
DESIGN ENGINEERING
PROJECT MANAGEMENT
MAINTENANCE OVERSIGHT
EXTERIOR DESIGN
PAINT OVERSIGHT
Our Expertise Brings Peace of Mind
Creating a top-tier destination for selective aviation clients, Sarah Mespelt Larranaga has designed and delivered over 100 aircraft from Gulfstream Aerospace, Falcon Jet, Bombardier, Boeing, and Airbus. From design ideation and aircraft customization to final delivery, we exist to make first-rate interiors and exteriors the client's reality. In private aviation, luxury refinement merges aesthetics, mechanics, and user experience. Our team intends to exceed client expectations by designing and spearheading cutting-edge interiors and exteriors. As experts in innovative, upgrading avionics, quality building standards, and well-appointed materials, we ensure they maximize their downtime. With 19 years of experience across aviation design, engineering, project management, and maintenance oversight, we execute a successful project outcome.
Explore Design Services
Benefit from our expertise while reducing aircraft cost and schedule. A good design is quality, as managing a schedule is to budget. We strive to exceed clients' expectations by limiting downtime, maintaining a budget, perfecting quality, and mastering design.
Where Bespoke Aviation Concepts Become Reality
Take a virtual walkthrough in our design studio in Los Angeles, California.
From ideation to certified reality, this is where we bridge the gap between visionary aesthetics and rigorous technical compliance, transforming the world’s finest business aircraft from the inside out.
2026 Awards & Recognition
Raising the Bar of Design
We excel at refurbishing, taking your aircraft from the past into the future with everything from new lighting, avionics upgrades like Starlink, Venue, PSKU, passenger reconfigurations, new materials, and a fresh new paint job. From a complete refurbishment of the entire aircraft to just a reconfiguration or materials renewal, we have the expertise and experience to create results with the most impressive impact.
A green aircraft completion is a chance to experience the high standard to which we design and manage with efficiency and excellence. The entire process, from the initial development of a floor plan to enrich a passenger's travel style to luxurious design details, state-of-the-art engineering, attentive quality control, and coordinated completion center management, will set new standards in aircraft design and management expectations.
Aircraft Solutions
Benefit from our expertise while reducing aircraft cost and schedule. A good design is quality, as managing a schedule is to budget. We strive to exceed clients' expectations by limiting downtime, maintaining a budget, perfecting quality, and mastering design.
Aircraft Oversight
When the time comes for minor maintenance, complete cabin refurbishment, or a new completion, trust our team to provide tailored solutions to your aircraft needs. With meticulous attention to detail, our technical oversight and design engineering team will manage your project from ideation to completion and delivery.
Quality Control
With a complete hands-on approach and an eye for detail, our team monitors every aspect of the build, ensuring quality is maintained at every point.
Schedule Monitoring
Monitoring schedule and work scope with your preferred facility, including maintenance supervision, is key in an on-time departure and keeping delay and cost increase to a minimum. We coordinate the approval process and build milestones, ensuring production stays on track and quality can be maintained without interrupting scheduled delivery dates.
Innovative Solutions
We are the premier destination for discerning aviation clients. From design ideation to customization to final delivery, we exist to make the exceptional Our client a reality. In private aviation, luxury is the union of aesthetics and mechanics. We intended to exceed clients' expectations by not only designing bespoke interiors and exteriors but also as experts in innovative avionics, structures, and cutting-edge materials. We assure them they get the most out of their downtime.
White Glove Delivery
The aircraft is inspected and prepared for return and delivery to the client. We ensure all discrepancies are rectified, and quality is perfect. We can assist in planning future maintenance and coordination in aircraft management, registration, and de-registration support. We facilitate the best solutions for taking new ownership and delivering a new or refurbished aircraft.
We facilitate each aircraft need with the maintenance management of your records, maintenance planning, and oversight to enhance your aircraft's resale. Our expertise extends beyond new aircraft to state-of-the-art cabin upgrades, avionics upgrades, and refurbishments.
Our Expertise Brings Peace of Mind
Tracking progress
Managing resources
Schedule savings
Problem solving when unexpected issues arise
Benefit From:
Define clear standards
Conduct regular Inspections
Address deviations promptly
Implement feedback
Process improvement to enhance project quality
Quality Control:
Management Tasks & Process
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We will evaluate, or our team will design clarifications the completion center provides, including custom design materials and/or avionics specifications for downtime.
Aircraft evaluation and direction from completion center on configuration and schedule.
Review the aircraft interior for current condition and any needed repairs for the new interior scope. The aircraft records are after the aircraft is selected for completion refinement.
Review each element of the provided design for best quality control and schedule feasibility.
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Audit the aircraft interior build and paint quality while the aircraft is in the completion and paint process to identify areas of concern that must be addressed.
We will supply rendering aids and material selections for the interior shops to help ensure absolute design and quality control during the build process.
Before furniture installation, the project manager will inspect the veneer finish for possible conditions that should be corrected before furniture installation. The veneering of cabinets is inspected from the beginning of the veneer to the completion of the finishing process before installation.
Conduct a seat review for each individual seat and divan from the foam building process to the covering process to ensure quality and design elements are on target to meet design expectations.
Inspect all materials for quality as they are applied to ensure schedule accuracy.
Review the carpet layout and cutting before installation.
Inspect weekly progress of all interior avionics work, exterior paintwork, and interior finishing to ensure on-time delivery and perfected quality.
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Provide aircraft completion schedule and weekly updates on the schedule process.
Provide a final aircraft exterior/interior inspection for quality and compliance completion of interior and exterior design and work scope.
Daily inspections will include but are not limited to:
Veneer build and veneer finish inspections and approvals.
Stitching and seat detail inspections
Seat and Divan quality control
Carpet Review and Approval
Dado inspection
Sidewall inspection
Lighting and PSU inspection
Monitor avionics installation followed by avionics functionality inspection.
Assist in aircraft customer acceptance flight and test of the aircraft cabin management system and meet all the documented requirements.
CONTACT US IN SUNNY LOS ANGELESsarah@sarahstream.com
+1 310-488-9452
+1 912-414-8276