AD evidence
AD 2025 16 01 A220 Engine Feed Check Valve Evidence source evidence review
The decision turns on AD 2025-16-01 (Amendment 39-23098, effective September 18, 2025) applies to A220 (BD-500-1A10/-1A11) airplanes and, after multiple in-service engine-feed check-valve failures causing in-flight fuel imbalance, requires repetitive replacement of the left and right engine-feed check valves and prohibits dispatch under certain conditions; confirm each check-valve replacement is recorded per side with part number and next-due, that the repetitive clock is running, and that any dispatch under the prohibited. Read AD status entry, maintenance task card, work order closure, and inspection result first. Resolve a single AD line masking left/right per-side replacement status, a replacement recorded without resetting the repetitive interval, and MEL/dispatch records that do not evidence the AD's dispatch restriction.
When this review is needed
- A transaction gate is coming up: A220 induction or pre-purchase review.
- The first evidence to test is AD status entry.
- The open question is AD 2025-16-01 (Amendment 39-23098, effective September 18, 2025) applies to A220 (BD-500-1A10/-1A11) airplanes and, after multiple in-service engine-feed check-valve failures causing in-flight fuel imbalance, requires repetitive replacement of the left and right engine-feed check valves and prohibits dispatch under certain conditions; confirm each check-valve replacement is recorded per side with part number and next-due, that the repetitive clock is running, and that any dispatch under the prohibited.
The problem
The difficult point is a single AD line masking left/right per-side replacement status, a replacement recorded without resetting the repetitive interval, and MEL/dispatch records that do not evidence the AD's dispatch restriction.
What gets reviewed
- Trace the ad 2025-16-01 a220 engine feed check valve claim from summary status to source page.
- Compare serial numbers, dates, revisions, and configuration references across the file.
- Identify missing support for applicability, accomplishment, transfer, or closure.
- Classify each exception as acceptance blocker, valuation issue, or cleanup item.
Scope this review
Tell us the asset, the event, and the evidence in scope, and we will outline a focused first engagement.
Send a representative, redacted record set and we will scope the review.
What gets validated
- Pass when the cited page proves the same asset and status claim.
- Fail when the record supports a different serial number, location, or configuration.
- Check that later revisions or changes are bridged back to the current status line.
- Reject spreadsheet-only closure where the underlying source page is absent.
Evidence normally required
- AD status entry
- maintenance task card
- work order closure
- inspection result
- release certificate
- service information reference
Common discrepancies
What is at stake
If unresolved, a single AD line masking left/right per-side replacement status, a replacement recorded without resetting the repetitive interval, and MEL/dispatch records that do not evidence the AD's dispatch restriction changes the A220 induction or pre-purchase review position for AD 2025 16 01 A220 Engine Feed Check Valve Evidence source.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Frame 2025 A220
Confirm the exact event, affected file set, buyer role, and decision standard before any ad status entry is treated as sufficient.
Trace Feed Check
Walk the named evidence from index entry to source artifact and mark where the trail supports, conflicts with, or fails to answer the page-specific question.
Sort Evidence Source
Group exceptions by closure route: document retrieval, data correction, engineering disposition, authority response, or contractual decision.
Package Proving Repetitive
Deliver the exception list, evidence map, and owner sequence in a form that can move directly into remediation, submittal cleanup, or transaction negotiation.
What the buyer receives
- Decision register for AD 2025 16 01 A220 Engine Feed Check Valve Evidence source, split into supported, disputed, and missing evidence.
- Source map for AD status entry tied to the controlling status records.
- Owner action list for document retrieval, data correction, technical disposition, or acceptance decision.
- Briefing note tying the open items to A220 induction or pre-purchase review.
Who uses the output
- Aircraft records analyst uses the output to decide acceptance conditions.
- Fuel systems engineer uses the output to request missing pages.
- Asset manager uses the output to brief pricing or delivery risk.
How the work fits into the transaction or program
AD 2025-16-01 (Amendment 39-23098, effective September 18, 2025) applies to A220 (BD-500-1A10/-1A11) airplanes and, after multiple in-service engine-feed check-valve failures causing in-flight fuel imbalance, requires repetitive replacement of the left and right engine-feed check valves and prohibits dispatch under certain conditions; confirm each check-valve replacement is recorded per side with part number and next-due, that the repetitive clock is running, and that any dispatch under the prohibited. The evidence set centers on AD status entry, maintenance task card, work order closure, and inspection result. The likely weak points are a single AD line masking left/right per-side replacement status, a replacement recorded without resetting the repetitive interval, and MEL/dispatch records that do not evidence the AD's dispatch restriction. Handoff: aircraft records analyst, A220 induction or pre-purchase review, AD 2025 16 01 A220 Engine Feed Check Valve Evidence source.
Aircraft-specific considerations
For AD 2025 16 01 A220 Engine Feed Check Valve Evidence source, the records depend on AD 2025-16-01 (Amendment 39-23098, effective September 18, 2025) applies to A220 (BD-500-1A10/-1A11) airplanes and, after multiple in-service engine-feed check-valve failures causing in-flight fuel imbalance, requires repetitive replacement of the left and right engine-feed check valves and prohibits dispatch under certain conditions; confirm each check-valve replacement is recorded per side with part number and next-due, that the repetitive clock is running, and that any dispatch under the prohibited.
Jurisdiction-specific considerations
For AD 2025 16 01 A220 Engine Feed Check Valve Evidence source, FAA review starts with AD status entry; the trigger is A220 induction or pre-purchase review.
Regulatory limits
The boundary is AD status entry traceability, not an airworthiness release.
What this review does not cover
- Physical inspection of the aircraft or component.
- Regulatory applications or formal authority submissions.
- Legal interpretation of purchase, lease, or financing remedies.
Specific to this review
- The deciding issue is the link between the current status line and the original source record.
- A correct historical entry can become incomplete after later configuration movement.
- Short exception language works best when it names the missing page or unsupported fact.
- The scope uses the 2025 A220 Engine Feed question as the control point, so the review stays tied to A220 induction or pre-purchase review and the buyer decision behind it.
- The evidence starts with AD status entry and follows Check Valve Evidence Source references until every exception has a source location and a reason code.
- The finding logic separates missing paperwork, conflicting status, stale revision data, and unsupported disposition because each class closes through a different owner.
- The timing matters for Aircraft records analyst: the output is useful only if the unresolved items are visible before acceptance, submittal, handback, or negotiation pressure fixes the sequence.
- The boundary control keeps Review Proving Repetitive Replacements questions in the records or certification lane and sends technical acceptance issues to the authorized people who own them.
- The handoff value comes from Page-indexed ad 2025-16-01 a220 engine feed check valve exception register.; it gives the next reviewer a precise map instead of another broad request for a better file.
- The source discipline is stricter on this page than on a general audit because the claim being tested is Verify per-side check-valve replacement and dispatch-restriction evidence for the A220 fuel-system AD..
Sources
U.S. Government (eCFR). The legal basis for issuing and enforcing Airworthiness Directives on U.S.-registered products.
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
Federal Aviation Administration. Completion and use of FAA Form 8130-3, Authorized Release Certificate, for new and used parts.
Frequently asked questions
What makes this records review different from a general file audit?
The scope is tied to 2025 a220 engine feed and to the decision named in the request. A general audit can list weak records; this pass ranks the gaps by whether they block a220 induction or pre-purchase review or can be closed later without changing the decision.
What evidence has to be available before this work starts?
The starting point is ad status entry, the current status source, and any index or matrix that tells reviewers where the supporting artifact should live. Missing inputs are logged as findings rather than filled with assumptions.
Who decides whether an open item is acceptable?
The review explains what the evidence supports and gives aircraft records analyst a closure path. Acceptance remains with the buyer, operator, authority, delegated engineer, or authorized person responsible for the underlying airworthiness or certification decision.
Relevant glossary terms
Related pages
Where this fits
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We will walk through your current state, the records or evidence involved, and a scoped first engagement.
Talk through the aircraft, records, evidence, deadline, and next useful step.