eVTOL / Powered-Lift Pack Qualification Standards Map
Eleven parameter classes matter for eVTOL propulsion-pack qualification. One is settled. Four have test frameworks but no assigned severity levels. Four more, energy density, C-rate capability, cycle life, calendar life, carry no public threshold at all. Every DVP row in those classes gets closed by the applicant's own engineering analysis, accepted on a program-specific basis by the certifying authority. Not by a standard. This card maps the full layered structure across FAA AC 21.17-4, EASA MOC VTOL.2440, DO-311A, and DO-160G: what each document actually covers, where each one's scope terminates, and where the DVP is working without a net.
eVTOL / Powered-Lift Pack Qualification Standards Map
Eleven parameter classes matter for eVTOL propulsion-pack qualification. One is settled. Four have test frameworks but no assigned severity levels. Four more, energy density, C-rate capability, cycle life, calendar life, carry no public threshold at all. Every DVP row in those classes gets closed by the applicant's own engineering analysis, accepted on a program-specific basis by the certifying authority. Not by a standard. This card maps the full layered structure across FAA AC 21.17-4, EASA MOC VTOL.2440, DO-311A, and DO-160G: what each document actually covers, where each one's scope terminates, and where the DVP is working without a net.
Research Layer
Lithium-Ion Battery Power Performance Assessment for the Climb Step of an eVTOL Application
No standard governs eVTOL climb-phase C-rate testing. ORNL's 15C pulse protocol is a citable empirical basis for program-defined DVP rows.
Lithium plating under high-rate pulses drives capacity fade pathways distinct from steady-state cycling, affecting cycle-life acceptance criteria.
Research Layer
Safety Assessment for Battery Thermal Runaway Propagation for Urban Air Mobility
The paper uses EASA MOC3 SC-VTOL over DO-311A, confirming the multi-document regulatory structure for manned eVTOL TRP qualification.
TRP containment is a mandatory pack-level architecture layer; cell-level non-propagation does not close the safety case alone.
Research Layer
Safety Design of Aviation Propulsion Lithium-Ion Battery Systems Based on Thermal Runaway Explosion Index
A single quantitative index linking temperature, altitude pressure, C-rate, and vibration conditions for aviation propulsion pack safety scoring.
Supplies rationale for combined-condition test sequencing when multi-stressor scenarios need documented justification. Tier 3 methodology, not a standard.
Research Layer
Novel Battery Power Capability Assessment for Improved eVTOL Aircraft Landing
Minimum landing-phase SOC floor has no standard home. This methodology gives the documented rationale for that program-defined threshold.
Addresses the landing power spike, complementing ORNL's climb-phase work to bracket both mission-profile extremes where battery limits bind.
DO-311A Scope Boundary
EASA says it plainly. DO-311A §2.4.5.5's thermal runaway containment test "was developed for lithium batteries that provide power to other aircraft systems or equipment" — not propulsion batteries (MOC VTOL.2440 §1). Citing it alone in a propulsion pack DVP misrepresents the regulatory posture.
The compliance path runs through MOC VTOL.2440, which requires four prerequisites before either containment approach is available: DO-311A §2.1 general requirements, software assurance per AMC 20-115, hardware assurance per AMC 20-152, and a full SAE ARP 4761 safety assessment including FHA, SSA, FMEA, and common cause analysis. The SSA must demonstrate that catastrophic failure is extremely improbable and does not result from a single failure of the propulsion battery system.
The applicant selects a containment path only after satisfying that prerequisite stack. Both paths require ≥20% of cells to achieve thermal runaway during test, a threshold DO-311A §2.4.5.5 does not impose. EASA added it because the base test can pass with as few as two cells in TR, which it identified as insufficient for propulsion-scale packs.
A DVP row citing "DO-311A §2.4.5.5" without the MOC VTOL.2440 prerequisite stack and the 20% cell threshold is incomplete. DO-311A is a useful baseline for the containment test itself, but the qualification requires the full MOC VTOL.2440 structure around it.
Last verified: 2026-07-24. Source: EASA Easy Access Rules for small category VCA, MOC VTOL.2440 (originated MOC-3 SC-VTOL Issue 2, June 2023; consolidated October 2025). MOC-4 SC-VTOL Issue 2 (July 2025) does not amend MOC VTOL.2440.
Source Access
