| Part Identification |
Confirm engine model, serial number, revision level, dimensions, material, and application. |
All identification data matches the approved technical drawing, parts catalogue, and equipment configuration. |
Approved specification, drawing, catalogue reference, and purchase order. |
Before quotation approval and again before shipment. |
Any mismatch, unclear marking, or undocumented design change. |
| Material Verification |
Review material certificates and, where necessary, perform positive material identification or hardness testing. |
Material grade, heat-treatment condition, and hardness fall within the approved specification. |
Mill certificate, heat number, test report, and inspection release note. |
Each production batch or lot. |
Missing certificate, conflicting test results, or hardness outside specification. |
| Dimensional Inspection |
Measure critical dimensions, mounting holes, shaft diameters, sealing surfaces, and tolerances. |
Critical dimensions comply with the approved drawing and functional fit requirements. |
Inspection report with measured values, calibrated equipment details, and inspector approval. |
First article and sampling of every subsequent lot; 100% inspection for safety-critical dimensions. |
Out-of-tolerance result, forced installation, leakage risk, or abnormal assembly clearance. |
| Surface and Workmanship |
Check cracks, burrs, corrosion, casting defects, machining marks, coating damage, and contamination. |
No visible defect that could affect sealing, fatigue strength, lubrication, fit, or service life. |
Visual inspection checklist and defect photographs when applicable. |
100% visual inspection before packing. |
Cracks, deep scoring, exposed base metal, rust, or contamination on functional surfaces. |
| Functional Testing |
Test applicable components for pressure, flow, rotation, electrical continuity, actuation, or load performance. |
Measured performance remains within the approved operating range under defined test conditions. |
Test procedure, calibrated instrument record, results, and acceptance signature. |
Each batch for functional parts; 100% testing where failure could stop the engine. |
Failed test, unstable output, abnormal noise, leakage, or unsafe operating behavior. |
| Traceability |
Link each part to its batch, production date, inspection result, shipment, and receiving location. |
Unique lot or serial reference is legible and remains linked through the supply chain. |
Lot register, barcode or label record, packing list, and shipment reference. |
At production, dispatch, receipt, and installation. |
Unidentified stock, mixed lots, missing labels, or inability to isolate affected parts. |
| Packaging for Global Transport |
Evaluate moisture protection, impact protection, corrosion inhibitor, sealing, and handling marks. |
Packaging prevents mechanical damage, moisture ingress, contamination, and loss of identification during transit. |
Packing specification, photographs, weight record, and shipping inspection checklist. |
Before every international shipment. |
Wet packaging, damaged crate, broken seal, missing shock protection, or unreadable label. |
| Warranty Terms |
Define warranty start date, coverage, exclusions, evidence requirements, response time, and remedy. |
Written terms cover manufacturing defects and specify inspection, repair, replacement, or credit procedures. |
Signed warranty clause, claim form, failure report, photographs, and operating records. |
Agreed before purchase order release; reviewed annually. |
Repeated failures, unresolved claim, missed response deadline, or disputed responsibility. |
| Storage Conditions |
Control humidity, temperature, dust, sunlight, vibration, stacking, and chemical exposure. |
Parts remain clean, dry, protected from corrosion, and stored according to material and packaging requirements. |
Storage map, environmental log, stock card, preservation record, and inspection checklist. |
Environmental monitoring continuously or at least daily; stock inspection monthly. |
Visible rust, damaged seals, expired preservation treatment, wet cartons, or lost traceability. |
| Inventory Rotation |
Use first-expire-first-out for shelf-life-controlled items and first-in-first-out for standard parts. |
Older approved stock is issued before newer stock unless technical restrictions require otherwise. |
Inventory system record, receipt date, expiry date, issue transaction, and cycle-count report. |
At every issue transaction; cycle count at least quarterly. |
Shelf-life exceeded, inactive stock, quantity variance, or stock condition no longer acceptable. |
| Incoming Inspection |
Compare received quantity, packaging, labels, certificates, and visible condition with shipping documents. |
Shipment matches the purchase order and approved documentation, with no transport damage. |
Goods-receipt report, discrepancy report, photographs, and quarantine record. |
Within 24–72 hours of receipt, depending on site procedures. |
Short shipment, wrong part, transport damage, missing certificate, or suspected counterfeit documentation. |
| Installation Control |
Verify cleanliness, correct orientation, torque, clearance, lubrication, and compatibility before installation. |
Installation follows the approved maintenance instruction and uses calibrated tools where required. |
Installation checklist, torque record, technician authorization, and removed-part reference. |
Every replacement event. |
Incorrect fit, abnormal vibration, leakage, overheating, noise, or failure during commissioning. |
| Replacement Decision |
Assess wear, remaining serviceability, failure mode, operating hours, and safety impact. |
Replace when the part reaches the approved wear limit, fails inspection, causes unreliable operation, or presents a safety risk. |
Condition report, measurement record, root-cause analysis, and replacement approval. |
During scheduled maintenance and immediately after a critical failure. |
Wear limit exceeded, recurring defect, sudden failure, unsafe condition, or repair cost exceeding replacement value. |
| Nonconformance Management |
Quarantine defective parts and investigate the cause across supplier, transport, storage, and installation stages. |
Nonconforming stock is clearly segregated and cannot be issued without documented disposition. |
Nonconformance report, corrective-action plan, disposition approval, and closure evidence. |
Immediately upon detection; trend review monthly or quarterly. |
Repeat defect, safety-related defect, unresolved corrective action, or adverse failure trend. |
| Performance Review |
Track on-time delivery, incoming rejection rate, warranty claims, mean time between failures, and stock availability. |
Performance remains within internally approved targets and improves through documented corrective actions. |
Supplier scorecard, quality dashboard, claim log, and quarterly review minutes. |
Monthly operational review and quarterly strategic review. |
Sustained quality decline, excessive lead-time variation, low stock availability, or repeated warranty claims. |