DA Form 2408-19-4: Engine Power Assurance Test Record – U.S. Army aviation maintenance professionals rely on accurate documentation to ensure aircraft engine performance and safety. DA Form 2408-19-4, officially titled the Engine Power Assurance Test Record, serves as a critical permanent historical record for tracking power assurance checks on turbine engines, particularly the T55-GA-714A used in CH-47 Chinook helicopters.
This article explains the form’s purpose, proper use, completion process, and importance in Army aviation maintenance programs.
What Is DA Form 2408-19-4?
DA Form 2408-19-4 (dated March 2014) is a standardized U.S. Department of the Army form used to document the results of engine power assurance tests (also called PAC – Power Assurance Checks).
It belongs to the family of DA Form 2408-series maintenance records under the Army Maintenance Management System – Aviation (TAMMS-A). The form provides a concise, permanent log of engine performance data under specific test conditions.
Official Download:
Download DA Form 2408-19-4 PDF
Purpose of the Engine Power Assurance Test Record
The primary purpose of DA Form 2408-19-4 is to record engine power assurance test results to verify that the engine produces required power output within manufacturer and Army specifications.
Key objectives include:
- Tracking engine performance degradation over time.
- Establishing and updating temperature margin values.
- Supporting maintenance decisions, troubleshooting, and airworthiness determinations.
- Maintaining compliance with DA PAM 738-751 and applicable aircraft technical manuals.
Power assurance tests help confirm the engine can deliver necessary takeoff thrust without exceeding limits for Exhaust Gas Temperature (EGT/PTIT), N1, torque, and other parameters.
When to Use DA Form 2408-19-4?
Army aviation units complete this form during:
- Scheduled power assurance checks (often at specific flight hour intervals or per technical manual requirements).
- After engine maintenance, repairs, or replacements.
- Periodic performance verification to monitor trends.
- Troubleshooting suspected power loss or performance issues.
It is a required record in aircraft historical files for engines like the T55 series.
How to Fill Out DA Form 2408-19-4?
Follow instructions in DA PAM 738-751 for accurate completion. Use black ballpoint pen for handwritten entries. Key blocks include:
- Block 1: Engine Model (e.g., T55-GA-714A)
- Block 2: Engine Serial Number
- Block 3: Aircraft Serial Number
- Columns for each test:
- Date
- Engine TSO (Time Since Overhaul)
- Press Alt (Pressure Altitude)
- OAT °C (Outside Air Temperature)
- PTIT Max/Act (Power Turbine Inlet Temperature)
- N1% Max/Act
- Torque Min/Act
- Fuel Flow
- Remarks/Temp Margin Value
Record both maximum/expected and actual values for comparison. Include any relevant remarks, such as test conditions or observations. Accurate data entry ensures reliable trend analysis for engine health.
Completed forms become part of the aircraft’s permanent maintenance records.
Importance in Army Aviation Maintenance
Proper use of DA Form 2408-19-4 contributes to:
- Safety — Early detection of engine performance issues.
- Readiness — Ensuring aircraft meet mission power requirements.
- Compliance — Meeting standards in AR 95-1, DA PAM 738-751, and aircraft-specific TMs.
- Historical Tracking — Allowing maintenance teams to analyze long-term engine degradation and plan overhauls effectively.
Units often review these records during inspections, aircraft transfers, and Aviation Resource Management Surveys (ARMS).
Related Forms in the 2408 Series
- DA Form 2408-19 — Aircraft Engine Turbine Wheel Historical Record
- DA Form 2408-19-2 — T700 Series Turbine Engine Analysis Check Record
- DA Form 2408-19-3 — Engine Component Operating Hours Record
- DA Form 2408-20 — Oil Analysis Log
These forms work together to provide comprehensive engine and aircraft maintenance documentation.
Best Practices for U.S. Army Maintenance Personnel
- Always reference the current DA PAM 738-751 and the specific aircraft technical manual.
- Perform tests under correct environmental conditions (altitude, temperature) as specified.
- File completed forms properly in the aircraft records.
- Use electronic systems where available (e.g., Aircraft Notebook) while maintaining paper backups as required.
- Train new personnel on accurate form completion to avoid discrepancies during audits.
Pro Tip: Regularly review historical DA Form 2408-19-4 entries to spot performance trends before they become mission-limiting issues.
Conclusion
DA Form 2408-19-4 Engine Power Assurance Test Record is an essential tool for maintaining the reliability and safety of U.S. Army turbine-powered aircraft. Accurate and consistent use supports operational readiness and helps protect aircrews and assets.
For the latest official version and guidance, visit the Army Publishing Directorate and consult DA PAM 738-751.
Download the form here: DA Form 2408-19-4 PDF
This guide is for informational purposes and should be used alongside official Army publications and technical manuals.