CP-189 Audit Preparation for Inspection Companies
A CP-189 audit runs in 6 stages, beginning with clause-by-clause gap analysis of the firm's certification procedure against the cp-189 edition.. American Society for Nondestructive Testing (ASNT), approved as an American National Standard by ANSI. Enforced by the contract that invokes it — US Navy and defence supply chains, government and utility procurement — and auditable through ASNT's Employer-Based Certification Accreditation Program, which accredits programmes against SNT-TC-1A, CP-189, or both.
CP-189 is an American National Standard and it states requirements where SNT-TC-1A offers recommendations — it was written because employers implemented SNT-TC-1A inconsistently. It sets minimum education, training, experience and examination requirements for Level I, II and III nondestructive testing and predictive maintenance personnel, and adds requirements for NDT instructors. The 2024 edition adds requirements for computed radiography, digital radiography and computed tomography image interpreters, requires employers to assess whether externally referenced examinations meet their requirements, restricts eye drops used to improve vision, and requires trained proctors for written examinations. The commercially decisive provision is that Level III personnel must hold ASNT NDT Level III certification. What separates firms that clear an audit from firms that collect findings is not the quality of the documentation but whether it describes what actually happens. The finding recorded most often is: Level III of record holds ASNT NDT Level III in some but not all of the methods the firm certifies under CP-189
Source: ANSI/ASNT CP-189 (2024) — ASNT product listing (source.asnt.org) and ASNT standards page (asnt.org/standards-publications/standards), which describes CP-189 as establishing minimum requirements for employer-based NDT personnel certification including the requirement for ASNT NDT Level III certification of Level III personnel; 2024 changes (image interpreter requirements, proctor training, eye drop restriction, employer assessment of referenced exams) taken from ASNT's own edition summaries. Prior editions confirmed: 2006, 2016, 2020, 2024. ANSI/ASNT CP-105 (2024) topical outlines from the same ASNT standards page. ASNT NDT Level III recertification requirements and fees from certification.asnt.org/recertification/asnt-ndt-level-iii, checked August 2026. ASNT NDT Level III ANAB accreditation to ISO/IEC 17024 from ASNT Certification Services newsroom. ASTM E543 acceptance of CP-189 from A2LA R212 (10 Sept 2025) and the ASTM E543 scope. Recertification intervals for Levels I and II under CP-189 deliberately not given as a number — not verified against the 2024 text.
| Stage | What happens | What it tests |
|---|---|---|
| Stage 1 | Clause-by-clause gap analysis of the firm's certification procedure against the CP-189 edition named in the contract — CP-189 is a. | Where the paperwork is tested against itself |
| Stage 2 | Verify the Level III of record holds current ASNT NDT Level III certification in every method the firm certifies, and. | Where the paperwork is tested against practice |
| Stage 3 | Verify instructor qualifications and that delivered training content maps to the ANSI/ASNT CP-105 topical outlines | Where the paperwork is tested against practice |
| Stage 4 | Review examination control — question banks, practical specimens, proctor training, and that nobody examined a subordinate or themselves | Where the paperwork is tested against practice |
| Stage 5 | Pull individual certification files and trace each back through training hours, experience, examination results and vision records | Where the paperwork is tested against practice |
| Stage 6 | Close nonconformances, then take either the customer's second-party approval or ASNT EBC accreditation against CP-189, which is issued for three. | Where the paperwork is tested against practice |
| Renewal | CP-189 makes recertification a requirement rather than a recommendation, with the interval fixed in the firm's certification procedure. The dependent credential has a firm published number: the ASNT NDT Level III certificate the CP-189 Level III must hold is renewed every five years, either by accumulating a minimum of 25 recertification points across the 60-month cycle while maintaining at least 36 months (756 days) per method of active Level III work, or by retaking and passing the examinations before the expiry date. ASNT publishes renewal-by-points fees from US$440 (member, single method) and examination recertification fees of US$525–545 per method for members. | Diarised from the certificate date, not the last audit |
How long does CP-189 audit preparation take?
Document work — the written practice, procedures and quality manual — takes weeks. What cannot be compressed is documented experience and records history: on-the-job hours accrue in real time, and calibration and certification history cannot be back-filled. Firms that start when the audit is scheduled rather than announced clear it without findings.
What does American Society for Nondestructive Testing (ASNT), approved as an American National Standard by ANSI. Enforced by the contract that invokes it — US Navy and defence supply chains, government and utility procurement — and auditable through ASNT's Employer-Based Certification Accreditation Program, which accredits programmes against SNT-TC-1A, CP-189, or both. The dependent credential, ASNT NDT Level III, is issued by ASNT Certification Services LLC. look at first?
Records, not manuals. A manual states intent; records show practice. The usual opening move is to take a completed job and trace it back to the technician's certification, the instrument's calibration, the approved procedure and the report — and see whether all four reconcile.
What are the most common CP-189 findings?
Level III of record holds ASNT NDT Level III in some but not all of the methods the firm certifies under CP-189, Certification procedure written in SNT-TC-1A's permissive language and therefore failing CP-189's mandatory requirements, Instructor qualifications not documented for in-house training delivery, Training content not traceable to the CP-105 topical outlines CP-189 relies on. Almost all of them are evidence problems rather than capability problems: the work was done correctly and the proof was not kept, or was kept somewhere the firm could not retrieve during the audit.
Can a consultant attend the CP-189 audit?
Yes, and it changes the outcome. Someone who has sat through the same audit at other firms answers in the auditor's own terms, produces the right record without a search, and stops a clarification turning into a finding. The firm still owns every answer — the consultant does not speak for it.
What happens after a CP-189 finding?
A corrective action with a deadline, and evidence of closure at the next audit. Repeat findings are treated far more seriously than first ones, because they show the corrective-action system itself is not working.
Does CP-189 require a pre-audit or gap assessment?
Not as a requirement, but the arithmetic favours it: a gap assessment finds the same evidence problems the auditor would, without the finding attached, and while there is still time to fix them. Firms entering their first CP-189 audit blind typically collect findings that a sampling exercise would have caught.
What the auditor asks to see
- Written certification procedure meeting CP-189 — the CP-189 equivalent of a Written Practice
- Current ASNT NDT Level III certificates for the Level III of record, one for every method the firm certifies
- NDT instructor qualification records
- Training records mapped to the ANSI/ASNT CP-105 topical outlines
- Experience records by method, level and technique, with evidence of supervision
- Written, specific and practical examination records, including evidence that proctors administering written examinations were trained
- Vision examination records — near-vision acuity and colour contrast
- CR, DR and CT image interpreter qualification records where the firm offers digital radiography
- Individual certification and recertification files carrying the certifying signature and the certified scope
Findings to close before the audit
- Level III of record holds ASNT NDT Level III in some but not all of the methods the firm certifies under CP-189
- Certification procedure written in SNT-TC-1A's permissive language and therefore failing CP-189's mandatory requirements
- Instructor qualifications not documented for in-house training delivery
- Training content not traceable to the CP-105 topical outlines CP-189 relies on
- CR or DR image interpreters not qualified after the firm migrated from film to digital radiography
- Proctor training for written examinations not evidenced
- ASNT NDT Level III certificate lapsed mid-contract, invalidating every certification signed after the expiry date
- Contract names one CP-189 edition and the firm self-audits against another
Related: the CP-189 overview, outsourced ASNT Level III cover, written practice development, NDT procedure development, a programme gap assessment, interim Level III cover.