FAA Clears MD-11 Freighters to Resume Flights After Grounding

The Federal Aviation Administration (FAA) has officially cleared the McDonnell Douglas MD-11 freighter fleet to return to the skies. According to reporting by FreightWaves, the agency approved Boeing’s maintenance and inspection protocols on May 11, 2026, effectively ending a six-month global grounding of the aircraft type.

The worldwide grounding was initiated in November 2025 following the tragic crash of UPS Flight 2976 in Louisville, Kentucky, which claimed 15 lives. With the new hardware fixes validated by regulators, operators are taking divergent paths. FedEx Express has immediately resumed commercial flights, while UPS has opted to retire its MD-11 fleet entirely.

We at AirPro News recognize the profound impact this grounding had on the global air cargo network, particularly during the 2025 peak holiday shipping season. While the return of the MD-11 brings operational relief to remaining operators, the aging aircraft continues to face intense political and regulatory scrutiny.

The Engineering Fix and Return to Service

Addressing the Structural Failure

The grounding stemmed from severe structural failures identified during the preliminary investigation of the UPS crash. According to FreightWaves, the National Transportation Safety Board (NTSB) found fatigue cracks in the left pylon’s aft mount lug and spherical bearing assembly. These cracks developed over numerous flights, culminating in an overstress failure that caused the engine to tear free from the wing.

To resolve the issue, Boeing, which acquired McDonnell Douglas in 1997, developed a highly invasive hardware fix. The approved protocol requires the installation of new spherical bearings in the aft mounts of each side engine pylon, alongside comprehensive inspections of the aft bulkhead.

“After extensive review, the FAA approved Boeing’s protocol for safely returning MD-11 airplanes to service,” the agency stated.

FedEx Express Resumes Operations

FedEx Express, currently the largest remaining operator of the MD-11, moved swiftly to implement the required fixes. FreightWaves reports that FedEx maintenance teams removed pylons from parked aircraft and shipped them to hubs in Memphis and Indianapolis for the necessary bearing replacements.

Following these modifications, FedEx conducted a successful test flight on May 9, 2026, flying from Memphis to Huntsville, Alabama, and back. By Sunday, May 10, the carrier operated its first commercial MD-11 flights in six months, servicing routes from Memphis to Los Angeles and Miami. FedEx plans to gradually phase its 28 remaining MD-11s back into service on a tail-by-tail basis, with intentions to operate the jets until 2032 to meet ongoing cargo demand.

Diverging Airline Strategies and Industry Impact

UPS and Western Global Responses

The extended grounding forced major logistical pivots across the air cargo sector, prompting airlines to activate spare aircraft and shift packages to ground networks. However, the long-term response to the MD-11’s viability has been sharply divided among the three remaining U.S. operators.

Unlike FedEx, UPS accelerated its fleet modernization plans in the wake of the crash. According to FreightWaves, UPS announced in January 2026 that it was permanently retiring its entire fleet of 28 MD-11s. Meanwhile, Western Global Airlines, a smaller Florida-based cargo carrier, was forced to indefinitely furlough its 147 MD-11 pilots in November 2025 due to the grounding. The airline has not yet publicly disclosed its future plans for the aircraft.

AirPro News analysis

We note that the divergence in fleet strategies between FedEx and UPS highlights a broader industry transition. UPS’s decision to permanently retire the MD-11 underscores a rapid shift toward newer, more fuel-efficient twin-engine freighters, minimizing the risk associated with maintaining aging tri-jet airframes. Conversely, FedEx’s commitment to flying the MD-11 until 2032 emphasizes the aircraft’s unique payload and volumetric capabilities, which remain difficult to replace in the short term without massive capital expenditure. The grounding’s timing during the 2025 peak season exposed the fragility of relying on older aircraft types, likely accelerating long-term fleet renewal discussions across the global cargo sector.

The UPS Flight 2976 Tragedy and Ongoing Scrutiny

Remembering the Louisville Crash

The catalyst for the grounding remains one of the deadliest cargo-aircraft accidents in U.S. history. On November 4, 2025, UPS Flight 2976 crashed seconds after takeoff from Louisville Muhammad Ali International Airport. Flight data and surveillance video showed the left engine and pylon separating during the takeoff rotation, with the aircraft reaching an altitude of only 30 to 100 feet before impacting an industrial area.

The disaster resulted in 15 fatalities, including all three crew members and 12 individuals on the ground, one of whom succumbed to severe injuries on December 25, 2025. An additional 23 people on the ground were injured.

Political Pushback and Upcoming Hearings

Despite the FAA’s clearance, the MD-11 remains under a microscope. FreightWaves reports that on May 1, 2026, U.S. Representative Morgan McGarvey (D-KY) sent a letter to the FAA demanding the permanent grounding of the aircraft, citing a documented history of mechanical issues.

Furthermore, the NTSB has scheduled a two-day public investigative hearing regarding the crash for May 19–20, 2026, in Washington, D.C. Investigators are expected to review how UPS applied previous inspection instructions relayed by Boeing in 2011 regarding similar structural components. Litigation is also ongoing, with lawsuits filed against UPS, Boeing, and the late pilot’s estate over the fatal accident.

Frequently Asked Questions

Why was the MD-11 freighter fleet grounded?

The FAA grounded the global MD-11 fleet in November 2025 following the fatal crash of UPS Flight 2976 in Louisville, Kentucky. The NTSB determined the crash was caused by an overstress failure resulting from fatigue cracks in the left engine pylon’s aft mount lug and spherical bearing assembly.

What is the approved fix for the MD-11?

Boeing developed a hardware fix that requires highly invasive inspections and the installation of new spherical bearings in the aft mounts of each side engine pylon, as well as inspections of the aft bulkhead.

Are all airlines resuming MD-11 flights?

No. While FedEx Express has implemented the fixes and resumed commercial flights with plans to operate the aircraft until 2032, UPS opted to permanently retire its entire fleet of 28 MD-11s in January 2026.

Sources: FreightWaves