Gulfstream G650
N555GA is efficient per nautical mile — 22.9 lbs CO₂/NM (−5% vs the Gulfstream G650 type median) — but a high absolute emitter: ~3.6× the type-median total (3,561 t vs 992 t), and −18% CO₂ per flight (72% of active peers emit more). Across 363 movements over 18 active months, it sits in the low risk tier.
Higher = lower risk on every axis. Weighted across 5 dimensions vs 505 active Gulfstream G650 peers (≥20 flights of 614 tracked). Tiers: low ≥75 · moderate ≥55 · elevated ≥40 · high <40.
Higher = lower CO₂/NM vs type. 22.94 lbs/NM vs type median 24.04 lbs/NM.
30% wt · +23 ptsHigher = cleaner CO₂ per flight hour vs type. 9,497 lbs/hr · −2% vs type median.
25% wt · +22 ptsHigher = steadier cadence · longest gap 27 days over 18 active months.
15% wt · +13 ptsHigher = less EU/UK ETS scope · 8% of tracked flights touch ETS airports.
20% wt · +18 ptsHigher = more active within the Gulfstream G650 fleet · 363 flights tracked.
10% wt · +10 ptsBased on 363 observations across 18 active months; ADS-B completeness 98%.
Consistent with a maintenance period, repositioning, or seasonal demand — not determinable from ADS-B alone.
N555GA's idle pattern falls within normal operational parameters — the longest ground period was 27 days against a type median of 57 days. No elevated risk of seal degradation, tyre flat-spotting or battery depletion is indicated at current idle tolerances.
−5% on CO₂/NM vs the active Gulfstream G650 cohort (n=505); −2% per flight hour. Likely reflects routing and stage-length mix, not engine condition.
Limited regulatory exposure. ReFuelEU SAF blending (2% from 2025, 6% by 2030) will add progressive cost on these routes — forward-looking, not projected past the observed window.
Per-route CO₂/NM vs the type median for each leg's distance band — sorted by flight-weighted deviation.
| Route | Flights | CO₂/NM | Δ vs band |
|---|---|---|---|
KAFW → KDAL Fort Worth → Dallas · under 250 nm | 2 | 171.39 | +343% |
KDAL → KAFW Dallas → Fort Worth · under 250 nm | 2 | 171.39 | +343% |
KIAD → KDAL Washington → Dallas · 1,000–2,000 nm | 40 | 23.88 | +11% |
KDAL → KIAD Dallas → Washington · 1,000–2,000 nm | 45 | 20.40 | -5% |
KDAL → KLAX Dallas → Los Angeles · 1,000–2,000 nm | 13 | 25.12 | +16% |
Deviation is measured against the Gulfstream G650 median for each leg's distance band — short single sectors run high by physics (take-off and climb dominate before cruise), so they are tagged and de-emphasised rather than flagged. This route view is consistent with the aggregate Efficiency Index of 22.94 lbs/NM (−5% vs type median).
CO₂/NM held within a moderate band across the observed window — consistent deployment, no material efficiency drift.
Monthly flight count · type-median 6/mo (dashed) · most recent month highlighted.
Activity is ramping month-to-month; Nov 25 is the single most pronounced dip (−95% vs the window mean).
One city-pair carries 12% of tracked movements — no single corridor dominates.
N555GA's idle pattern falls within normal operational parameters — the longest ground period was 27 days against a type median of 57 days. No elevated risk of seal degradation, tyre flat-spotting or battery depletion is indicated at current idle tolerances.
Short-hop share (14% of cycles under 250 nm) is in line with the active-peer median of 23%. Cycle-driven wear tracks the type norm.
N555GA emits 9,497 lbs CO₂/hr vs the Gulfstream G650 fleet average of 9,725 lbs/hr.
Monthly CO₂ tracks flight volume closely (r=0.75) — emissions move with activity, not an efficiency divergence.
ReFuelEU Aviation Regulation 2023/2405 mandates increasing SAF blending at EU airports: 2% from 2025, rising to 6% by 2030 and 70% by 2050. With 8% of tracked N555GA movements touching ETS airports, progressive SAF cost uplift will affect operating economics on these routes.
CO₂ estimates are derived from ADS-B flight data using aircraft-specific fuel-burn factors aligned with EUROCONTROL EMEP/EEA guidance. Distance figures are taken from flight-trace data. EU ETS coverage follows Directive 2003/87/EC as amended, covering intra-EEA flights and UK ETS post-2021. Percentile rankings are computed within the active Gulfstream G650 type-fleet population (peers with a minimum flight threshold in the period) tracked by Carbon Sky Index — not the full registered fleet.
This report is based on ADS-B flight data. Carbon Sky Index does not track ownership or registry information; flight records may be incomplete where ADS-B coverage is limited. Provided for informational purposes only — it does not constitute financial, legal or regulatory advice.
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