Why Proficiency Testing Matters for Jet A-1 Aviation Fuel Laboratories
Proficiency testing is a critical component of quality assurance for laboratories involved in Jet A-1 aviation turbine fuel testing. Whether supporting airport fuel supply chains, refinery operations, or independent inspection services, laboratories must demonstrate competence, consistency, and compliance with recognised industry standards.
Participation in a structured Jet A-1 Proficiency Testing (PT) Scheme provides an objective way to assess analytical performance and benchmark results against peer laboratories operating under similar test conditions. For laboratories seeking a structured programme, further information on the Stanhope-Seta Jet A-1 Proficiency Test Scheme can be found here: SETA-1317-0085
The role of Proficiency Testing in ISO 17025 accreditation
Laboratories operating to ISO 17025 are required to monitor the validity of their results. One of the most widely accepted approaches is participation in appropriate proficiency testing schemes relevant to the scope of testing.
For laboratories testing Jet A-1 fuel to:
- Defence Standard 91-091
- ASTM D1655
participation in a recognised Jet A-1 PT scheme provides independent confirmation that test methods are performing correctly and that reported data is technically robust.
Regular participation supports:
- Audit readiness
- Demonstration of technical competence
- Ongoing method verification
- Identification of systematic bias or analytical variability
Details of the current bi-annual Seta Jet A-1 Proficiency Test Scheme are available here: SETA-1317-0085
Key Jet A-1 test parameters typically included in PT Schemes
Jet A-1 testing covers a range of physical and chemical properties essential for aviation safety and operational reliability. Proficiency testing schemes commonly include parameters such as:
- Flash Point
- Freezing Point
- Density
- Distillation
- Conductivity
- Thermal Stability
- Water Separation Index
- Wear Scar Diameter
- Total Acidity
- Particle Counting
A well-designed Jet A-1 PT scheme enables laboratories to compare results across these properties, helping to identify potential method drift, calibration issues, or operator variability.
Statistical evaluation and performance indicators
Jet A-1 proficiency testing schemes typically operate in accordance with:
- ISO 17043 – Conformity assessment for proficiency testing
- ISO 13528 – Statistical methods for proficiency testing
- BS EN ISO 4259 – Precision data for petroleum test methods
Performance is generally evaluated using:
- Z-scores to assess deviation from the assigned value
- Test Performance Index (TPI) for overall performance monitoring
- Probability (P-P) plots for visual interpretation of data distribution
Understanding these statistical tools allows laboratories to interpret PT results effectively and implement corrective actions where required. The Stanhope-Seta Jet A-1 scheme follows recognised statistical methodologies consistent with these standards. Full scheme details can be found here: SETA-1317-0085
The importance of representative Jet A-1 samples
For proficiency testing to deliver meaningful insight, samples must reflect real-world aviation fuel conditions. Jet A-1 samples sourced from active supply networks provide a realistic testing matrix aligned with routine laboratory analysis.
Proper homogeneity testing, stability verification and controlled distribution are essential to ensure valid interlaboratory comparison.
Supporting continuous improvement in Aviation Fuel testing
Beyond accreditation requirements, participation in a Jet A-1 proficiency testing scheme supports continuous improvement by enabling laboratories to:
- Strengthen confidence in routine analytical results
- Detect method drift at an early stage
- Improve analyst training and competency tracking
- Demonstrate credibility to customers and regulators
In aviation fuel testing, where product quality directly impacts operational safety, structured performance monitoring is an essential element of laboratory quality systems.
Further information
Laboratories seeking to participate in a structured Jet A-1 proficiency testing programme can view full details of the Stanhope-Seta Jet A-1 Proficiency Test Scheme here: SETA-1317-0085
