Bleed system records
ATR PRSOV functional test interval evidence review
operators, airlines, CAMOs use this page when ATR maintenance program revision or induction puts the PRSOV AD status under review. The work traces PRSOV AD status and Functional test task card to Test result record, Maintenance release entry, current status data, and supplied acceptance criteria. Findings identify missing source pages, unsupported applicability, serial or location conflicts, and open corrective evidence. The buyer receives a cited register, evidence map, request list, and closure plan.
When this review is needed
- A ATR maintenance program revision or induction is approaching and the records owner needs a page-level proof set.
- The summary status uses shorthand that cannot be defended without the underlying task, release, or configuration record.
- A counterparty has asked which exceptions are true blockers and which are retrieval issues.
The problem
PRSOV AD status evidence often looks complete until the reviewer asks which page proves the actual aircraft, engine, component, or location. The review focuses on those trace points instead of accepting inherited status language.
What gets reviewed
- The review notes that confirm the reduced functional-test interval is reflected in the task-control system.
- Review test cards for affected valve, result, date, and aircraft reference.
- Compare next-due calculations against the last accomplished test.
- Check corrective action evidence for failed or incomplete tests.
- List aircraft where interval control and source evidence do not align.
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 test evidence and tracking export support the same reduced interval.
- Fail when the old interval remains in the forecast after AD incorporation.
- Pass when failed tests have corrective closure before release.
- Fail when a test card identifies the system but not the affected valve or aircraft.
Evidence normally required
- AD status report
- PRSOV functional test cards
- maintenance program or task-control update
- test result sheets
- aircraft logbook releases
- next-due tracking export
Common discrepancies
- Task-control interval updated centrally but not in the aircraft forecast.
- Functional test card signed without recording the result.
- Corrective action closed in maintenance tracking but absent from source records.
- Next-due date based on the prior interval.
What is at stake
If the gap survives to closing or delivery, the next owner may inherit a disputed status line and a harder retrieval problem. Schedule, reserve, or acceptance decisions can then rest on assumptions instead of records.
Move from findings to resolution
Move from findings to a documented resolution path.
How the work runs
Frame 2025 Atr
The review notes that confirm the exact event, affected file set, buyer role, and decision standard before any prsov ad status is treated as sufficient.
Trace Functional Test
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 Review
Group exceptions by closure route: document retrieval, data correction, engineering disposition, authority response, or contractual decision.
Package System Records
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
- Bleed system records discrepancy log with source-page citations
- Evidence map for accepted, rejected, and unresolved lines
- Targeted retrieval list for records owners
- Closure brief for technical and commercial decision makers
Who uses the output
- Aircraft records analyst uses the register to decide which lines can be accepted or escalated.
- Maintenance program planner uses the evidence map to request missing technical records.
- Systems engineer uses the closure plan for transaction, audit, or delivery decisions.
How the work fits into the transaction or program
AD 2025-24-09 (Amendment 39-23206, effective January 13, 2026) applies to ATR42 and ATR72 airplanes and requires repetitive functional tests of each pressure regulator and shut-off valve at a reduced interval, with corrective action, after a design review found the prior interval left a dormant-failure risk that combined with icing could lead to loss of control. The evidence set centers on AD status report, PRSOV functional test cards, maintenance program or task-control update, and test result sheets. The likely weak points are functional tests still scheduled at the superseded longer interval, a single test line covering both PRSOVs where each valve must carry its own result, and a failed test closed without the mandated troubleshooting trail. Handoff: aircraft records analyst, ATR maintenance program revision or induction, ATR PRSOV functional test interval.
Jurisdiction-specific considerations
FAA and EASA references are used as evidence context for recordkeeping and compliance support. The review does not treat one authority's record format as automatic acceptance by another authority or by a counterparty.
Regulatory limits
This work is an evidence review only. It does not approve a repair, modification, inspection, manual revision, aircraft, engine, appliance, or part, and it does not replace the regulator, authorized release personnel, operator, or maintenance organization.
What this review does not cover
- Physical inspection or borescope work outside the records set
- Engineering approval of repairs or alternate methods
- Commercial negotiation of credits or reserves
Specific to this review
- For this review, interval-change ADs fail in records when the first test is evidenced but the continuing control is not.
- A recurring records trap is that pRSOV evidence needs both the test result and proof that the reduced cadence entered the planning system.
- A transaction review should identify whether the next buyer inherits a due task sooner than the summary suggests.
- The scope uses the 2025 Atr Prsov Functional question as the control point, so the review stays tied to ATR maintenance program revision or induction and the buyer decision behind it.
- The evidence starts with PRSOV AD status and follows Test Interval Evidence Review 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 Bleed System Records Proving questions in the records or certification lane and sends technical acceptance issues to the authorized people who own them.
- The handoff value comes from Bleed system records discrepancy log with source-page citations; 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 the reduced-interval PRSOV functional-test evidence for the ATR bleed-system AD..
Sources
U.S. Government (eCFR). The legal basis for issuing and enforcing Airworthiness Directives on U.S.-registered products.
European Union / EASA. Continuing airworthiness, maintenance records, CAMO responsibilities, and the airworthiness review process in the EASA system.
U.S. Government (eCFR). Maintenance recordkeeping content and approval-for-return-to-service requirements, including 43.9, 43.11, and Appendix B.
Frequently asked questions
What makes this records review different from a general file audit?
The scope is tied to 2025 atr prsov functional and to the decision named in the request. A general audit can list weak records; this pass ranks the gaps by whether they block atr maintenance program revision or induction or can be closed later without changing the decision.
What evidence has to be available before this work starts?
The starting point is prsov ad status, 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
Talk to an engineer who has done this work
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.