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FedEx used Lean manufacturing methodologies to divide maintenance checks strategically between its Indianapolis and Memphis teams.
Lean manufacturing, as its name implies, is mostly associated with industrial production. For global shipping and logistics giant FedEx, applying it to airframe MRO has led to measurable successes.
The Lean manufacturing model is a structured, disciplined methodology designed to drive efficiency, quality and continuous improvement by maximizing value and minimizing waste. FedEx, which performs fleet maintenance at its hubs in Memphis, Tennessee, and Indianapolis, introduced the Lean model in late 2007 and made significant progress in 2008, according to Larry Bradbury, senior manager of aircraft maintenance in Memphis. The focus was specifically on B and C checks.
“Applying Lean manufacturing models to our B and C check environments was to improve work span efficiency and improve quality to reduce the amount of maintenance allocations for our fleet,” Bradbury notes. “Cycle time improvements would allow us to consolidate maintenance allocations and provide more lift without having to purchase more aircraft. This represented significant cost savings and was the driving focus for many of our efforts.”
Bradbury also reports that FedEx identified multiple opportunities to improve consistency and predictability across maintenance operations. They included optimizing check execution and workflow and improving point-of-use (POU) effectiveness in such areas as tooling, material and data. At the same time, FedEx recognized the potential for enhanced material availability and supply chain support, as well as the opportunity to establish clear standard work and process controls and aligning planned with actual work-hour estimates.
During the early years of Lean implementation, FedEx targeted its Boeing 727s, which numbered 90 in 2008. At the time, the trijet’s main cargo door (MCD) inspection was seen as a key opportunity for Lean application.
“The 727 MCD inspection had a variability of inspection outcomes, repair requirements and visit span time,” Bradbury says. “Strengthening general workflow and process consistency became a major focus area. Additionally, work card flow was improved to establish a more structured, logical progression of tasks, reducing rework and improving efficiency.”
FedEx retired its last 727s in 2013. As of Feb. 28, it operated 391 jets: 90 Boeing 757-200s, 150 767Fs, 34 MD11s, 59 777Fs and 58 Airbus A300-600s. An additional 317 all-turboprop feeder fleet includes 221 Cessna 208Bs and 35 Cessna 408s. FedEx also has 19 ATR-72s, 26 ATR-72 600Fs and 16 ATR-42s. The turboprops are dry-leased to outside companies that are responsible for their operations and maintenance.
Bradbury points out that FedEx applies the Lean model to LSY-checks—a term FedEx uses for B check-equivalent inspections. Lean practices, he says, also apply to C checks, which FedEx terms heavy maintenance visits (HMV) and heavy maintenance extended visits (HMVX).
The B/LSY checks, Bradbury points out, are focused on general service, lubrication and light inspection events. They are usually completed within 20-72 hr.—depending on fleet type—and are scheduled within a window of 600-800 flight hours. The LSY inspections have a 1,000-hr. limit and are done fleetwide in-house.
FedEx performs heavy C checks internally on its 767Fs. They are calendar-time-based and typically scheduled every two years. The HMVs involve greater airframe disassembly for structural inspections. “The HMVs generally span 2-4 weeks, depending on the inspection scope and interval,” he notes.
Bradbury adds that heavy maintenance on the A300-600, 757-200, 767, MD-11 and 777F is outsourced.
Under FedEx’s Lean manufacturing program, the Indianapolis and Memphis maintenance teams strategically divide work based on fleet specialization to maximize efficiency and expertise, Bradbury says. Memphis conducts B/LSY-checks on the 777F, A300-600 and MD-11 fleets, plus landing gear changes on the 767F, A300-600, 757-200 and MD-11, along with select special maintenance visits as operational needs arise. Indianapolis performs HMV/X and LSY checks on the 767 fleet and B/LSY-checks on the 757-200s.
EARLY CONCERNS
When FedEx adopted Lean MRO, there were some concerns about the viability of adapting manufacturing-based Lean concepts to a maintenance environment with inherent variability, Bradbury points out.
“Ongoing communication, strong leadership engagement and data-driven metrics demonstrated measurable and sustained improvement over time,” he says. “Many team members quickly recognized the value of Lean and became early adopters. Others took a more measured approach, playing a critical role in influencing peer adoption.
“The Lean implementation teams were cross-functional, including aircraft maintenance technicians and tool room and stores personnel, enabling strong collaboration across departments,” Bradbury continues. “Dedicated Lean subject matter expert teams were also established, providing in-depth training and guidance to support change management.” He adds that the focus was on setup time reduction, standardized work, logical systematic work card sequencing and the 5S+ safety approach, reinforcing safety as the top priority.
SEEING BENEFITS
Ever since the Lean implementation, FedEx has continuously reviewed the manufacturing practices to ensure they remain practical, effective and align with current operational needs.
“The Lean methodology has strengthened cross-departmental collaboration and created a culture of ongoing improvement,” Bradbury says. “One of the most measurable successes has been on-time performance and improved predictability of maintenance span times at both Memphis and Indianapolis. Refined check flow and improved planning allow for better accommodation of natural maintenance variation. Lean practices have also improved maintenance execution clarity. Labor is now applied more precisely—at the right time and in the right sequence, enhancing productivity.”
Lean initiatives, Bradbury says, have also led to the development of kits for routinely changed parts, ensuring all supporting hardware—such as gaskets, O-rings and filters—is included. “This saves time, reduces rework and supports predictable maintenance flow,” he says. “Along with that, the adoption of POU tooling and material placement has directly contributed to reduced span times.”
According to Bradbury, FedEx’s Lean model has earned its keep. For example, he notes, Indianapolis expanded to two scheduled HMVX lines from one, while Memphis added landing gear change and special visit capacity.
“These additions were achieved without proportional increases in staffing by using modeling to improve scheduling efficiency for both events and maintenance labor,” he says. “An additional benefit we achieved through these internal productivity improvements was the ability to reduce external maintenance spend and in-source more maintenance events.”
Bradbury adds that recent FedEx Lean updates include implementing advanced modeling and visualization tools to enable real-time scenario forecasting and more dynamic operational decision-making; optimizing maintenance flow by adjusting multiple parameters simultaneously to improve efficiency and outcomes; piloting next-generation check-flow optimization; and moving from static templates to a rules-based, intelligent system that continuously reoptimizes the critical path
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