AirIndex Research · FAA LID 05LL
MIDWEST MEML
WILLOWBROOK, IL — Chicago metro. Operational · Private use.
OperationalPrivate usePrivate
← All Chicago heliportsData integrity
57/100
Self-reportedData Integrity IndexIndependent inspection
Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 710 ft MSL · USGS ground 703 ft · Δ 7 ft
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
Cross-checked against independent public data — USGS 3DEP terrain, Overture/OSM building footprints, the federal hospital registry, and measured dimensions. The State of the U.S. Heliport Record →
eVTOL readiness
InfeasibleConversion feasibility · obstruction screen
This pad already covers the eVTOL landing footprint as it stands.
recorded pad eVTOL FATO
Recorded pad (limiting side)
120 ft
eVTOL FATO required
100 ft
FAA EB-105 vertiport pattern — 2× a ~50 ft eVTOL controlling dimension, plus a 125 ft safety-area side.
Load-bearing FATO
100 × 100 ft must be structural
No heliport precedent — typically the binding gate for rooftop and hospital pads.
Obstruction clearance
High obstacle within 0.5 nm — conflicts with the expanded footprint and 8:1 approach
Measured against FAA pad geometry and federal FATO sizing (EB-105). A dimensional pre-screen — site-level validation required, and independent of the underwriting risk score.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationUNKNOWN
FAA OE/AAA airspace determination data integration pending.
Q3 · State enforcementLIMITED
State has limited enforcement of FAA standards.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
05LL
AIX ID
aix:hp:6ZHY01W4
Lat / Lng
41.74922, -87.93590
Elevation
710 ft MSL
Activation date
1976/12
Last owner update
2025/05/29
FAA OEAAA airspace determinations0
No FAA OEAAA determinations linked to this facility.
Full risk assessment
This page is the public data-integrity record. The full RiskIndex assessment — Q1–Q5 compliance, dimensional / FATO analysis, an underwriting-grade risk score, peer benchmark, and a sealed Site Intelligence Report — is available on request.
Request the full assessmentBuilding autonomous systems? See the machine-verified feed
Provenance FAA NASR 5010 · pad dims APT cycle 2026/03/19 · USGS 3DEP terrain · Overture structure · eVTOL screen conversion-feasibility-1.1 · AIX-ID aix:hp:6ZHY01W4 · Methodology →