Why can't Mountain Air Cargo simply operate the ATR 72 under Part 135 regulations without a waiver?

Part 135 regulations (designed for commuter and on-demand carriers) impose a 7,500-pound payload limit for extended overwater operations. The ATR 72, classified as a scheduled carrier aircraft under Part 121, naturally exceeds this capacity. Mountain Air is requesting a waiver to increase the Part 135 limit to 10,500 pounds, avoiding the need to reclassify the ATR 72 as a Part 121 operator—which would require costly ETOPS (Extended Operations) certification for the extra 20 miles of overwater distance.

What is ETOPS and why is it so burdensome for Mountain Air Cargo?

ETOPS (Extended-range Twin-engine Operational Performance Standards) is an FAA certification program that allows twin-engine aircraft to operate beyond the traditional 60-minute divert time over water. It requires extensive operational compliance, maintenance protocols, and administrative oversight. Mountain Air argues that ETOPS approval is disproportionately expensive and complex given that the Caribbean destinations require flying only 20 miles beyond the Part 121 threshold—making the regulatory compliance cost unjustifiable relative to the incremental distance.

What happens to Caribbean service if the waiver is denied?

If the FAA denies the waiver, Mountain Air would either need to (1) pursue full ETOPS certification for ATR 72 operations, (2) maintain aging ATR 42 freighters longer than planned, or (3) discontinue Caribbean service. Given that Caribbean routes operate at 85–100% capacity and that single missed flights create multi-week cargo backlogs, service interruption would disrupt FedEx's feeder network and impact shippers dependent on regional connectivity to Aruba, Curaçao, and Bonaire.

How does this waiver request affect FedEx's broader network strategy?

Mountain Air serves as a critical FedEx feeder operator, connecting smaller markets to larger hubs via turboprop aircraft. Fleet modernization with ATR 72s increases capacity and reliability, reducing delays and backlogs. The waiver allows FedEx to maintain service to underserved Caribbean markets without disproportionate regulatory overhead, preserving competitive advantage in regional air freight while managing operational costs.

Could this waiver set a precedent for other regional carriers?

Potentially. If approved, the waiver could establish a regulatory pathway for Part 135 operators modernizing their fleets to operate higher-capacity aircraft on international overwater routes without full ETOPS certification. This could incentivize other FedEx partner carriers and regional operators to upgrade aging turboprop fleets, improving service reliability and network efficiency across feeder networks.

Trade Policy & Tariffs

Moderate

FedEx Feeder Airline Seeks FAA Waiver to Maintain Caribbean Routes

Jun 4, 2026

Get tomorrow's supply chain signal

Daily supply-chain brief. Free, unsubscribe anytime.

The signal

Mountain Air Cargo, a FedEx partner airline based in North Carolina, is requesting a federal waiver from the Federal Aviation Administration to maintain cargo service to Caribbean destinations (Aruba, Curaçao, and Bonaire) during its fleet modernization. The airline currently operates under Part 135 regulations using ATR 42 freighters, which permit extended overwater operations up to three hours. However, the company's planned transition to larger ATR 72 freighters would shift operations under Part 121 (scheduled carrier rules), which impose a 60-minute overwater limit—creating a regulatory mismatch since the Caribbean routes fall just 20 miles beyond this threshold.

The core issue centers on the disproportionate regulatory burden of obtaining Extended Operations (ETOPS) certification for a minimal distance overage. Mountain Air is seeking approval to operate ATR 72s under Part 135 with a payload limit of 10,500 pounds (up from the current 7,500-pound ceiling on Part 135 operations), which would avoid the costly and administratively complex ETOPS requirement while maintaining service reliability. The ATR 72 offers 16,800 pounds of maximum payload capacity, allowing the airline to reserve additional fuel for operational flexibility and emergency contingencies.

This situation reflects broader challenges in regional aviation logistics: aging aircraft fleets, regulatory frameworks designed for legacy operations, and the misalignment between modern aircraft capabilities and outdated classification systems. For FedEx and its partner network, service interruption to high-demand Caribbean routes (currently operating at 85–100% capacity) poses inventory and delivery risks. The outcome of this waiver petition could set precedent for how Part 135 operators modernize while maintaining international connectivity in underserved markets.

#fedex-partner-airline

#aviation-regulations

#part-135-part-121

#payload-limit-waiver

#regional-air-freight

#etops-approval

Frequently Asked Questions

What This Means for Your Supply Chain

Simulation Suggestion

strategic

What if Mountain Air Cargo's FAA waiver is denied and ATR 42 service is discontinued?

Mountain Air Cargo is unable to operate ATR 72s under Part 135 regulations and lacks resources to pursue ETOPS certification. The airline discontinues Caribbean service to Aruba, Curaçao, and Bonaire, forcing FedEx to find alternative regional carriers or suspend service to these high-demand routes currently operating at 85–100% capacity. Simulate the impact on FedEx's regional feeder network capacity, cargo backlogs, and service-level performance metrics for Caribbean shipments over a 6-month period.

Run this scenario

Simulation Suggestion

this month

What if the FAA approves the waiver but limits the payload increase to 9,000 pounds instead of 10,500 pounds?

The FAA grants a partial waiver, permitting Mountain Air to operate ATR 72s under Part 135 with a 9,000-pound payload limit (instead of the requested 10,500 pounds). This still improves capacity over the current 7,500-pound ATR 42 limitation by 20%, but reduces operational flexibility and fuel reserves compared to the requested limit. Simulate the impact on cargo capacity per flight, service reliability, and backlog recovery time for high-demand Caribbean routes.

Run this scenario

Go deeper:

Supply Chain Digital Twin: The 2026 Guide

How operators model end-to-end supply chains to see how tariffs, supplier shocks, and regulatory changes ripple across cost, service, risk, and time.

Get the daily supply chain briefing

Top stories, Pulse score, and disruption alerts. No spam. Unsubscribe anytime.

The signal

Frequently Asked Questions

What This Means for Your Supply Chain

Related Articles