Digitization quality
How to evaluate scan and indexing quality for aircraft records
Evaluating scan and indexing quality means checking whether a digitized records set is legible, complete against the originals, and indexed so a reviewer can actually find a given document. It is read by records teams deciding whether a digitization project can be relied on. The work covers scan legibility and resolution, completeness against the original count, the index structure, retrieval tested by trying to find specific records, and the handling of stamps, signatures, and multi-page documents. You finish with a quality result covering legibility, completeness, and findability, plus a defect list of pages and entries that need rework.
When this review is needed
- A digitization project has delivered a scanned set and someone has to confirm it can be relied on.
- A data room is being built from scans and the index has not been tested for retrieval.
- A set was scanned years ago and its legibility and completeness are now in doubt.
- A records set is moving with the aircraft and the digital copy has to stand in for the paper.
The problem
A scanned set looks like progress, but a pile of images that cannot be searched or trusted is worse than the paper it replaced, because it carries the appearance of a usable record without the substance. The pages that fail most often are the ones that matter, the stamps, signatures, and handwritten entries that prove a release or an accomplishment, because they need more resolution than typed text to stay legible. An index that lists documents the set does not contain hides the gap until a reviewer goes looking for one of them.
What gets reviewed
- Scan legibility and resolution on a representative page sample
- Completeness of the digital set against the original document count
- The index structure and whether its entries match the documents
- Retrieval, tested by trying to find specific records through the index
- Handling of color stamps, signatures, and multi-page documents
- The specification the scanning project was supposed to meet
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
- Sampled pages are legible at the resolution the records need
- The digital document count reconciles with the originals
- Index entries point to the documents they claim to
- A reviewer can retrieve a named document through the index in one step
- Stamps, signatures, and handwritten entries are legible, not just typed text
Evidence normally required
- The digitized records set and its index
- The original documents or a reliable count of them
- The retrieval scenarios the set has to support
- Any specification the scanning project was supposed to meet
Common discrepancies
- Pages scanned too low to read a stamp, signature, or handwritten entry
- A digital count that falls short of the original document set
- Index entries that point to the wrong document or a missing one
- Multi-page documents split or merged so a record reads as incomplete
- Color stamps captured in grayscale so an annotation is lost
What is at stake
A legible document nobody can retrieve through the index is functionally missing from the record set, so a weak index quietly subtracts from the records it was meant to organize. A scan too low to read a stamp or a signature cannot support the trace it sits in, so a buyer or an inspector treats it as absent regardless of the original behind it.
How the work runs
Sample for legibility
Pull a representative page sample and check resolution against the hardest content, the stamps, signatures, and handwriting.
Reconcile the count
Compare the digital document count against the originals or a reliable count to surface what is missing.
Test retrieval
Use the index to find named documents and confirm a reviewer can reach each in one step.
List the defects
Compile the pages and index entries that need rework, with the retrieval test record attached.
What the buyer receives
- A quality result covering legibility, completeness, and findability
- A defect list of pages and index entries that need rework
- A retrieval test record showing which documents could be found
Who uses the output
- Records managers accepting or rejecting the digitization
- Data-room teams relying on the scans for diligence
- Records teams commissioning the rework the defect list calls for
How the work fits into the transaction or program
A quality check sits between a digitization project and any use of its output, whether that is a data room or a records set that travels with the aircraft. Its defect list drives the rework, and its retrieval record shows the set can carry the trace a reviewer needs.
Regulatory limits
A quality check confirms the digital set is legible, complete, and findable against the originals. It does not certify the records themselves, make an airworthiness determination, or replace the originals where an authority requires the source document.
What this review does not cover
- Performing the scanning or re-scanning itself
- Verifying the technical content of the documents
- Any airworthiness determination or regulatory approval
Specific to this review
- A scanned set is only as useful as its index, since a legible document nobody can retrieve is functionally missing from the record set.
- Stamps, signatures, and handwritten entries fail a scan-quality check most often, because they need higher resolution than typed text to stay legible.
- A color stamp captured in grayscale can lose an annotation entirely, so color handling is part of the check rather than an afterthought.
Sources
Federal Aviation Administration. FAA acceptance criteria for electronic recordkeeping systems and electronic signatures.
U.S. Government (eCFR). Records an owner or operator must keep, including total time in service, current status of life-limited parts, and AD compliance.
Federal Aviation Administration. Completion and use of FAA Form 8130-3, Authorized Release Certificate, for new and used parts.
Frequently asked questions
Why test the index rather than just check the scans?
Because a legible document that nobody can find through the index is functionally missing. Legibility and completeness only pay off if a reviewer can retrieve a named document, so the index is tested by actually trying to retrieve specific records.
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.
Adapt the checklist to your asset, event, and jurisdiction.