Maintenance window constraints

• What maximum aircraft on ground (AOG) duration can you tolerate for a retrofit during a scheduled maintenance slot? Options: 0-3 days, 4-7 days, 8-14 days, 15+ days (likely infeasible)
• Do you have blackout periods when retrofit work cannot be scheduled? Options: No, Yes — I will list dates in the next field
• If yes, please list blackout months or date ranges for scheduling work

Decision process and stakeholders

• Who signs commercial approval for fleet modifications and which technical or lessor roles must be included in conversations?
• How long does your approval cycle typically take from proposal to signed agreement? Options: Under 2 weeks, 2 to 6 weeks, 6 to 12 weeks, 12+ weeks

Budget window

• Is there an allocated budget range for this program we should design to fit? Options: No budget allocated yet, Indicative range: under $500k, $500k to $2M, $2M to $5M, Over $5M (may require custom scope)

Timeline and acceptance criteria

• What target window are you aiming for to complete the first aircraft modification? Options: Within 3 months, 3 to 6 months, 6 to 12 months, 12+ months, Undecided
• Are there firm acceptance requirements we should design to meet for certification, lessor acceptance, AOG tolerance, or performance warranties? Options: No firm criteria yet, Yes I will provide acceptance criteria, Yes lessor technical acceptance required, Yes specific fuel or payload warranty required
• Is there any existing data or documentation we should review before a full discovery call (maintenance records, previous retrofit reports, lessor letters, STC files)?

Why this program matters to your fleet

• How would you summarize the primary business driver for your operation in considering this modification now? Options: Reduce fuel burn, Increase payload or range, Extend airframe life, Meet a regulatory mandate, Improve passenger or cargo experience, Other
• Who on your team will own the program outcomes if you move forward? Options: Fleet planner, VP engineering, Director of maintenance, Program manager, Lessor technical representative, Other
• Walk me through the specific aircraft types and serial ranges in your fleet you expect to include in the program.
• How many airframes in your active fleet would be within the candidate window for this modification? Options: 1-5, 6-20, 21-50, 51-100, 100+
• If the modification could not be completed within your next peak-season maintenance window, would you stop the program or adjust scheduling? Options: Stop the program, Adjust scheduling and continue, Re-evaluate with stakeholders, Unsure

Where daily operations feel the squeeze

• What single operational failure in the past 12 months would have made a retrofit unacceptable for your operation?
• When a retrofit overruns scheduled downtime, what immediate cost lines rise for your operation? Options: Lost revenue from aircraft, AOG support and ferry costs, Route rescheduling costs, Crew and hotel costs, Regulatory or contractual penalties, Other
• Estimate the minutes or days of AOG your organization will tolerate per aircraft before service and leasing penalties trigger vendor escalation.
• Which parts of your maintenance cycle are least flexible for adding retrofit work? Options: Heavy checks, C-checks, Line maintenance, Peak-season windows, Scheduled storage or dormancy, Other
• What would be the single acceptance threshold on turnaround time that, if unmet, would make your team cancel a vendor contract? Options: AOG > 24 hours, AOG > 48 hours, AOG > 72 hours, Exceeds planned maintenance window, Other

Big risks that stop programs cold

• Who or what in your organization typically vetoes a retrofit after technical review? Options: Lessor technical team, Regulatory compliance, Fleet planning, Finance/procurement, Executive leadership, Other
• Describe the most common certification or lessor objection you've faced on prior STC efforts and how much schedule delay it caused.
• Have you had an STC submission rejected or deferred in the last five years? Options: Yes, rejected, Yes, deferred with major changes, Yes, minor deferral, No
• If regulatory approval extended beyond your planning window, would the program still be viable financially for your organization? Options: Yes, still viable, No, not viable, Only with contract-priced schedule guarantees, Unsure
• Which lessor constraints are hardest for your team to satisfy during installation and acceptance? Options: Flight test limitations, Return-to-service condition, Warranty transfer restrictions, Named technical acceptance, Insurance or lease clauses, Other

The other options you're weighing

• What would have to be true about your current approach for you to keep it rather than hire an external vendor?
• Which alternatives are on the table right now for your program, including internal projects, incumbent vendors, or other retrofit providers? Options: Stay with incumbent vendor, Use internal engineering and install, Select a different external provider, Delay modification, Retire or phase out aircraft instead, Other
• Who is the internal champion or incumbent contact who would argue against changing course in your organization?
• What single proof would make your team sign with a new vendor within 30 days? Options: Verified AOG times on similar installs, STC already approved for your aircraft type, Binding schedule guarantee, Lessor pre-acceptance letter, Other
• How many incumbent reference operators would your team expect to speak with before choosing a new partner? Options: 0, 1-2, 3-5, 6+

How ready your operations really are

• If we needed full access to your maintenance records and structural repair data next week, who in your organization would approve or decline access?
• Which systems in your environment hold the aircraft technical data we would need, and can those systems export serviceable digital packets? Options: Maintenance records system, Digital logbook platform, Paper records only, Proprietary vendor system, Other
• Do you have a named maintenance facility and windows already committed, or would schedule confirmation be required before contracting? Options: Named facility and windows confirmed, Facility named but windows tentative, No facility selected, need assistance, Unsure
• Estimate the number of dedicated engineering hours per week your team can assign to support kit integration and certification. Options: None, 1-5 hours, 6-15 hours, 16-40 hours, 40+ hours
• Are there any contractual or insurance clauses affecting your fleet that would prevent third-party kit installs at your preferred facilities? Options: Yes, strict restrictions, Some restrictions with approval, No restrictions, Unsure

What success will prove

• What measurable fleet outcome would make this program an unambiguous win for your leadership?
• Which performance metrics do you track in-service for your fleet that we must match or beat? Options: Fuel burn per flight hour, Payload capacity, Range extension, Block time improvement, Residual value on lease return, Other
• If we commit to a specific fuel burn improvement, what verification data would your team accept during the warranty period? Options: Flight data recorder reports, Block fuel sampling over a set of flights, Operator fuel receipts and reconciliations, Independent flight testing, Other
• If the pilot program proves the promised numbers, what would stop your organization from signing the production contract that same month? Options: Lessor acceptance delay, Budget cycle timing, Internal procurement approvals, Nothing, we would sign, Other
• Over a five-year horizon, which financial metric matters most for your team when approving capital spend? Options: Net present value, Payback period, Internal rate of return, Per-aircraft installed cost, Residual value preservation, Other

Next steps that move the schedule forward

• Which single scheduling blocker would prevent your program from starting within 60 days?
• Who needs to approve the initial statement of work in your organization and by what internal deadline? Options: Fleet operations, VP engineering, Lessor technical rep, Procurement, Executive leadership, Other
• When would your procurement team need a fixed-price scope to include in the next budget cycle? Options: Immediately, Within 2 weeks, Within 1 month, In next quarter, Unsure
• Assuming we provide a firm installation window, binding schedule milestones, and named owner accountability, would you be authorized to execute a contract within 7 days? Options: Yes, authorized, Yes with executive sign-off, No, additional approvals required, Unsure
• Which documentation or attestation will your legal or lessor teams in your organization require before contract signature? Options: Warranty terms and transfer, STC approval milestones, Named lessor acceptance letter, Insurance certificates, Parts traceability and batch records, Other

• Data Package Confirmation and Gap List
• Maintenance Schedule and Downtime Integration Workshop
• Reference Retrofit Record Review and Applicability Decisions
• Installation Constraints Matrix and Technical Sign-off

• Prepare tooling and access drawings reflecting resolved constraints for facility planning and pre-kitting.
• Present summarized reference cases and outcomes
• Catalog of reference-case mitigations classified as adopt, adapt, or reject with rationale for each.
• Defined evidence list for each adopted mitigation required for engineering validation and certification.
• Create and distribute the reference-case applicability matrix with adopt/adapt/reject decisions.
• Compile the specific tests and inspection steps needed to validate each adopted mitigation.
• Update the installation checklist with changes derived from reference-case lessons.
• Review draft installation constraints matrix
• Signed installation constraints matrix accepted for engineering and kit design, or a short list of escalations with decision deadlines.
• Finalized weight and balance inputs and a clear set of acceptance criteria for post-installation flight testing.
• Publish the final installation constraints matrix or the escalation list with required evidence and decision dates.
• Update the STC work plan and kit design inputs with the confirmed constraints and W&B numbers.
• Confirm session scope and success criteria
• Validated list of received documents and a single prioritized gap list with criticality for each item.
• Clear definition of the exact evidence or document needed to close each gap and the acceptable formats.
• Produce and distribute the prioritized data gap list with required document templates and acceptable formats.
• Request missing maintenance and structural records as listed in the gap list.
• Schedule any necessary follow-up data clarification calls for items marked critical.
• Review maintenance calendars and blackout periods
• Three named schedule scenarios, each with start and end dates and estimated aircraft-on-ground durations.
• List of critical path tasks and agreed mitigation approaches for each scenario.
• Clear decision on the preferred scheduling scenario to carry into installation planning.
• Produce the integrated schedule scenarios document with critical path and downtime estimates.
• Prepare a risk and mitigation register tied to each schedule scenario.
• Confirm facility-level constraints and tooling availability that affect the preferred scenario.
• Resolve open engineering decisions
• Decompose modification tasks into installable work packages
• Walk through submitted airframe records
• Compare reference cases to current airframe and installation context
• Finalize weight and balance and performance input values
• Identify applicable mitigations and necessary adjustments
• Overlay work packages on calendar to produce schedule scenarios
• Data quality and discrepancy identification
• Identify critical path items and mitigation options
• Prioritize gaps and define closure steps
• Record escalations and acceptance criteria for unresolved items
• Agree evidence requirements for adopted mitigations

• Solution Experience: Modification Program Walkthrough

• Confirm the current state and cost to your operation
• You confirm the modeled performance gains meet your acceptance criteria or identify the gap that remains.
• Seller to deliver a validated performance and schedule model workbook using the provided aircraft data within 5 business days.
• Review the provided aircraft data and assumptions
• You confirm one schedule scenario that fits your planned maintenance windows and AOG tolerance.
• Buyer to provide final list of aircraft serials, confirmed maintenance windows, and your lessor acceptance criteria within 3 business days.
• Show the aircraft-specific performance model
• Seller to produce a STC milestone plan with contingency actions and estimated approval dates for the agreed scenario.
• You agree that the STC and lessor risk mitigation shown materially reduces the certification uncertainty you were facing, or list the remaining concerns to resolve.
• Buyer to confirm the internal decision date and the buying committee members who must sign acceptance of the displayed performance and schedule outcomes.
• Walk installation schedule scenarios
• Map certification and lessor acceptance risks
• Validate that this matches your needs

• Solution Experience: Modification Program Walkthrough
• Solution Experience Deck
• Solution Brief

• meeting
• slides
• document

• STC Development and Certification
• Winglet Kit Fabrication and Delivery
• Winglet Installation
• Freighter Conversion Kit Fabrication
• Freighter Conversion Installation
• Avionics Upgrade Installation and Wiring
• Cabin Reconfiguration Installation
• Structural Life-Extension Reinforcement Installation
• NDT Inspections and Structural Testing
• Structural Repair and Corrosion Treatment
• Performance Instrumentation Installation
• Post-Modification Flight Test and Data Report
• Maintenance Manual and AMM Revisions
• Parts Manufacturing and Spares Supply
• Fuel-Burn Validation Data Package

STC Development and Certification

• Which certification authority will lead the STC approval for the modification? Options: FAA, EASA, Other (specify)
• Provide the target STC approval date and any regulatory milestones tied to your fleet plan
• Identify the baseline type certificate number and any active Airworthiness Directives that must be addressed in the STC
• Describe the compliance demonstrations you expect included in the STC package (structural tests, electrical load analysis, EMI/EMC reports)
• Describe the STC acceptance evidence you will accept from the authority (final approval letter, FAA Form 8110-3 or EASA equivalent) and any certificate numbering requirements

Winglet Kit Fabrication and Delivery

• Confirm the delivery window you require for winglet kits relative to your planned maintenance slot Options: <30 days, 30-90 days, >90 days
• Which aircraft models and registration(s) or serial-number ranges will receive the kits?
• Specify preferred shipping and customs handling for kits (domestic delivery, bonded import, deferred duty) Options: Domestic delivery, Bonded import, Deferred duty, Other
• Do you require serialized kit tracking and individual kit traceability to aircraft tail numbers? Options: Yes, serialized tracking, Yes, batch only, No
• List spares and consumables you expect with each kit delivery (fastener kits, torqueing hardware, sealants, placards)

Winglet Installation

• Which maintenance check type will host the winglet installation on each aircraft (C-check, D-check, base heavy maintenance, line maintenance)? Options: C-check, D-check, Base heavy maintenance, Line maintenance
• Confirm the maximum allowed aircraft-on-ground time for the installation at each slot (hours or days)
• Who will perform the physical installation at each site — your MRO team, our field team, or a third-party MRO partner? Options: Your MRO team, Our field team, Third-party MRO partner
• Specify AMM chapters, SRM references, and any OEM service bulletin numbers we should use during installation
• Confirm the acceptance evidence required after installation to clear return-to-service (signed completion checklist, lessor witness report, aircraft logbook entry) Options: Signed completion checklist, Lessor witness report, Aircraft logbook entry, Other

Freighter Conversion Kit Fabrication

• Indicate the freighter conversion variant required (main deck cargo door, reinforced floor, cargo handling system) and any major options
• Provide structural configuration details required for kit fit (existing floor beam spacing, cargo door cutout allowances, previous repairs recorded in the logbook)
• Specify required cargo system certifications or lessor constraints that must be included with kits (cargo restraint class, certified roller types)
• Do you require kits manufactured with long-term preservation or special corrosion-preventive packaging for storage prior to installation? Options: Yes, shelf-life treated, No, standard packaging, Other
• List expected spares and replacement items shipped with each conversion kit (floor panels, locks, rollers, tie-down fittings)

Freighter Conversion Installation

• Which hangar or MRO facility will perform the conversion and what is the facility's capability or rating that affects structural works?
• When do you plan to schedule the conversion relative to the aircraft's next heavy maintenance check?
• Describe any lessor, insurer, or third-party surveys required during conversion and their preferred timing
• Who will sign the structural logbook entries and certify repairs/alterations after conversion? Options: Your authorized engineering representative, Our certifying staff, Third-party certifier
• Specify ground-support constraints at the installation site (crane capacity, floor load limits, tooling clearances)

Avionics Upgrade Installation and Wiring

• Which avionics function or suite is in scope (FMS replacement, ADS-B Out, SATCOM, new flightdeck displays)?
• Provide existing wiring diagrams, rack layouts, and available rack slot allocations for the target aircraft registrations
• Indicate required databus integrations (ARINC 429, ARINC 664, MIL-STD-1553) and the number of channels to be connected
• Do you require software/firmware configuration and acceptance testing as part of the installation scope? Options: Include software configuration and test, Hardware-only installation, TBD
• Specify deliverables for avionics work: updated wiring diagrams, software load certificates, and configuration control documentation

Cabin Reconfiguration Installation

• Which cabin layout change do you require (seat reflow, lavatory relocation, premium cabin install, high-density seating) and which AMM or IPC chapters apply?
• Provide seat part numbers, certification basis, and any supplemental approvals required for installed furnishings
• Indicate whether galley or cabin modifications require additional flammability documentation or flame-test certificates Options: Yes, flame-test required, No additional required, TBD
• Describe the expected weight and balance impacts and whether you require an updated weight & balance report per aircraft registration
• Who will sign the interior conformity release and accept the cabin change for return-to-service? Options: Your release engineer, Our release engineer, Third-party inspector

Structural Life-Extension Reinforcement Installation

• Identify the structural locations and part numbers targeted for reinforcement (wing attach fittings, splice plates, stringer repairs) with SRM references
• Provide recent fatigue inspection records and any NDT findings that inform reinforcement scope
• Specify whether a dedicated fatigue test program or coupon testing must be delivered as part of the engineering assessment Options: Include fatigue test program, No fatigue testing required, TBD
• List the engineering deliverables you require: stress reports, finite element analysis models, and updated structural drawings
• Indicate preferred materials and corrosion-preventive processes for reinforced areas (alclad specification, primer type, touch-up procedures)

NDT Inspections and Structural Testing

• Which non-destructive testing methods do you require for acceptance and QA (ultrasonic, eddy current, dye penetrant, radiography)? Options: Ultrasonic, Eddy current, Dye penetrant, Radiography, Other
• When should NDT inspections be performed relative to the modification (pre-mod baseline, in-process, post-mod acceptance, all stages)? Options: Pre-mod baseline, In-process, Post-mod acceptance, All stages
• Provide access constraints or panel locations that affect probe access and NDT setup on the airframe
• Who must supply certified NDT technicians and what certification standard must they hold (NAS 410, EN 4179, other)?
• Specify required NDT reports and traceability for each serial-numbered part or structural item

Structural Repair and Corrosion Treatment

• List known corrosion zones and attach or reference the most recent corrosion inspection reports from the aircraft logbook
• Do you prefer permanent part replacement or field repair for corrosion-damaged skins and stringers? Options: Parts replacement preferred, Field repair preferred, Case-by-case basis
• Provide preferred corrosion treatment chemistries or painting system specifications if mandated by your maintenance program
• Who authorizes repairs in SRM-limited areas and signs the work package for release to service? Options: Your engineering authority, Our engineering authority, Third-party approval
• Indicate required documentation for repaired areas (repair drawings, torque procedures, logbook entries)

Performance Instrumentation Installation

• Which flight performance instruments do you require installed (mass flow meters, total fuel flow probes, GPS ground-track recorder, data acquisition unit) and on which serials?
• Specify the data channels and sampling rates required for fuel-burn validation (engine fuel flow, fuel temperature, weight, true airspeed)
• Indicate preferred sensor and DAU mounting locations with reference to station numbers or station lines on the aircraft
• Do you require real-time telemetry during flight test or only post-flight downloadable data packages? Options: Real-time telemetry, Post-flight download, Both
• Who will own and archive the raw flight test data and for how long must it be retained?

Post-Modification Flight Test and Data Report

• Provide the target flight test profile and required maneuvers with associated flight levels and weight conditions (climb, cruise points, handling checks)
• Which instrumentation baselines must be recorded on every test flight (block fuel, trip fuel, weight, center of gravity, ambient temperature, engine parameters)?
• Specify the flight test acceptance thresholds that will validate contractual performance warranties (fuel burn reduction percent, climb performance, handling quality limits)
• When do you require the formal flight test report and raw data package delivered after completion of flight testing? Options: Within 7 days, Within 14 days, Within 30 days, Custom
• Identify the flight test pilot and engineering signatories required on the test flight report for approval

• Master Services Agreement (MSA)
• Statement of Work (SOW)
• Purchase Agreement — Kits & Materials
• Installation Work Order & Site Access
• Schedule Guarantee Addendum
• Acceptance Criteria & Final Acceptance Certificate
• Warranty & Performance Guarantee
• Lessor and Third-Party Acceptance Addendum
• Regulatory & STC Delivery Plan
• Payment Terms, Escrow & Retention Schedule
• Change Order & Variation Process

• Go-live Health Check (weeks 1-4)
• First In-service Measurement (weeks 4-10)
• 90-day Acceptance Gate
• Quarterly Operational Review
• Annual Performance Validation

• Update the warranty claims log with root-cause summaries and expected closure dates within 3 business days.
• Publish the acceptance decision record including pass/fail per criterion and evidence within 24 hours.
• If conditional or failed, create a remediation tracker with actions, verification method, and resolution dates.
• Schedule any required follow-up flight tests or inspections and capture the dates in the shared calendar.
• Quarterly performance summary
• Confirmed quarterly performance against fuel burn reduction target and understanding of any variance drivers.
• All open warranty claims are documented with target resolution dates and tracking in the shared channel.
• Priority operational issues are assigned remediation tasks with target dates.
• Re-confirm completion checklist and owners
• Publish the quarterly performance dashboard and reconciled fuel-burn dataset to the shared channel.
• Create a parts and tooling replenishment plan for any shortages identified during the review.
• Annual cumulative outcomes report
• A validated annual statement of realized fuel burn reduction and residual value uplift versus Outcome Discovery targets.
• Clear understanding of warranty and reliability trends with agreed mitigations for high-impact failure modes.
• Ongoing issue and warranty intake process confirmed for the next year.
• Publish the annual outcomes report with supporting data tables and trend analysis to the shared repository.
• Produce a mitigation plan for the top two recurring failure modes with timelines and verification steps.
• Confirm the annual calendar of Quarterly Operational Review meetings and channel escalation contacts.
• All pre-flight and flight-test items are documented as complete or assigned with target resolution dates.
• A named channel for warranty and issue intake is active and accessible to both parties.
• Immediate operational blockers are captured and have agreed remediation actions and dates.
• Publish the completed installation checklist and outstanding-item register to the shared channel within 48 hours.
• Open warranty/issue intake thread in the agreed channel and circulate the intake workflow.
• Schedule follow-up ground or flight checks for any open flight-test items within 7 days.
• Present first in-service data
• Quantified view of fuel burn reduction percentage and payload capacity versus Outcome Discovery targets is agreed.
• Root causes for any shortfalls are identified and a remediation plan with dates is agreed.
• Data collection and reporting sources are confirmed to ensure comparability at the acceptance gate.
• Deliver a reconciled dataset showing baseline and measured fuel burn by route segment and phase of flight within 5 business days.
• Run a weight & balance audit for the sampled flights and report any discrepancies affecting payload measurement.
• Implement agreed operational adjustments or software/parameter updates and log completion dates.
• Restate acceptance criteria and targets
• A documented pass/fail result for each Outcome Discovery acceptance criterion with supporting evidence.
• Named buyer signatory captured for the acceptance decision and remediation timeline assigned where required.
• Remediation actions and verification steps are recorded with firm completion dates.
• Warranty and reliability review
• Warranty and lifecycle trends
• Present aggregated outcome data for each criterion
• Diagnose any performance gaps
• Installation and flight-test validation
• Open issues triage and prioritization
• Document pass/fail per criterion and rationale
• Long-term operational risks and mitigations
• Action plan to close gaps before acceptance gate
• Early operational signals and usage
• Confirm ongoing issue, warranty, and enhancement channel
• Open issues and immediate remediation actions
• Confirm data sources and measurement cadence
• Operational sustainment and supply readiness
• Formal acceptance decision and signatory capture
• Confirm communication channel and warranty intake process
• Agree remediation items for failed or conditional criteria