# Did Expedition 74 Complete Its 8-Month ISS Mission Successfully?

**Soyuz MS-28 touched down southeast of Dzhezkazgan, Kazakhstan at 5:27 a.m. CDT on July 26, 2026**, closing out a 241-day Expedition 74 mission that sent NASA astronaut Chris Williams and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev around Earth 3,856 times. The crew departed the International Space Station at 2:03 a.m. CDT and completed a parachute-assisted landing in a remote area near the town of Zhezkazgan. All three crew members were reported safe following post-landing medical checks.

The mission, which began with a November 27, 2025 launch, covered more than 102 million miles in [low Earth orbit](https://orbital-intel.com/glossary/leo). It marked the first spaceflight for both Williams and Mikaev, and the second for Kud-Sverchkov. Scientific highlights included research into new cancer treatments, [in-space manufacturing](https://orbital-intel.com/glossary/in-space-manufacturing) of materials used in high-performance computers and electronics, and two extravehicular activities (EVAs) focused on ISS power system upgrades and a Canadarm2 robotic arm joint replacement. Following recovery, Williams will fly via NASA aircraft to Johnson Space Center in Houston.

---

## Mission Profile: 241 Days, 3,856 Orbits

The Soyuz MS-28 crew launched November 27, 2025, under the Expedition 74 designation. Their 241-day stay places this mission solidly within the standard long-duration ISS increment, comparable to typical six-to-eight-month rotations that have become the operational norm for the station's multinational crews.

The 3,856 orbits and 102-million-mile total distance cited by NASA are a function of ISS's roughly 90-minute orbital period at approximately 400 km altitude — figures consistent with a mission of this length. Post-landing recovery followed the established Soyuz protocol: helicopter transfer to Karaganda, where recovery teams are based, before Williams boards a NASA aircraft for the return to Houston.

For Kud-Sverchkov, this second long-duration mission adds to his cumulative on-orbit experience. For Williams and Mikaev, the 241 days represents their complete career on-orbit totals to date.

---

## Scientific Work: Cancer Research and Advanced Materials in Microgravity

The crew's research portfolio touched two of the highest-value areas currently active on the station.

**Cancer treatment research** aboard ISS leverages [microgravity](https://orbital-intel.com/glossary/microgravity) to study cellular behavior that cannot be replicated in terrestrial labs — tumor spheroid formation, drug delivery mechanisms, and protein crystallization all behave differently at 1g versus 0g. NASA's release does not specify which particular investigations Williams supported, but the framing around "new cancer treatments" aligns with the station's long-running pharmaceutical research partnerships.

**In-space manufacturing** of materials for high-performance computing and electronics is an area of growing commercial interest. Companies like [Varda Space Industries](https://orbital-intel.com/companies/varda-space-industries) and [Redwire Corporation](https://orbital-intel.com/companies/redwire) have separately pursued [microgravity](https://orbital-intel.com/glossary/microgravity) manufacturing as a commercial thesis — the ISS remains the primary testbed for validating which material classes genuinely benefit from orbital processing versus those that represent marketing narrative. The biotech and space manufacturing intersection is also tracked at [synbiointel.com](https://synbiointel.com) for readers following bio-manufacturing-in-orbit developments.

---

## Two EVAs: Power Upgrades and Canadarm2 Joint Repair

Williams completed two spacewalks during Expedition 74. The stated objectives — prepping for ISS power system upgrades and replacing a faulty joint on the Canadarm2 robotic arm — represent routine but operationally critical maintenance that keeps the station's 25-year-old infrastructure functional.

The Canadarm2 joint replacement is particularly notable from an on-orbit servicing perspective. The arm is central to visiting vehicle berthing operations, including [SpaceX](https://orbital-intel.com/companies/spacex) Dragon cargo and crew missions, and any degradation in joint performance carries mission risk across the entire ISS logistics chain. The fact that a joint required replacement underscores the ongoing maintenance burden of aging orbital infrastructure — a data point relevant to operators and investors evaluating the economics of future [Commercial LEO Destinations (CLD)](https://orbital-intel.com/glossary/commercial-leo-destinations) versus extending ISS operations.

---

## Broader Industry Context: ISS as a Bridging Platform

The ISS has now hosted continuous human presence for more than 25 years. Expedition 74's completion arrives at a moment when NASA's [Artemis Program](https://orbital-intel.com/glossary/artemis) is driving demand for long-duration human spaceflight data — bone density loss, muscle atrophy, fluid shifts, and radiation exposure profiles from 241-day missions directly inform habitat design and countermeasure protocols for lunar surface stays and eventual Mars transit planning.

Commercially, each Soyuz rotation reminds the market of the narrow transportation pipeline still feeding the station. With the [Commercial Crew Program](https://orbital-intel.com/glossary/commercial-crew) providing the primary U.S. crew access via SpaceX Dragon, Soyuz seats retain value as redundancy and as the primary path for non-U.S. crew members. The operational continuity of this dual-path approach will matter to whoever operates the successor commercial LEO platforms currently in development.

The science return from missions like Expedition 74 also provides the validation data that venture-backed in-space manufacturing startups require to de-risk their own orbital production theses with enterprise customers.

---

## Key Takeaways

- **Soyuz MS-28 landed July 26, 2026**, southeast of Dzhezkazgan, Kazakhstan at 5:27 a.m. CDT — all crew safe
- **241 days, 3,856 orbits, 102 million miles** — a standard long-duration ISS increment under Expedition 74
- **Crew:** NASA's Chris Williams (first flight), Roscosmos cosmonauts Sergey Kud-Sverchkov (second flight) and Sergei Mikaev (first flight)
- **Scientific focus:** cancer treatment research and in-space manufacturing of advanced computing materials, both conducted in microgravity conditions unreplicable on Earth
- **Two EVAs completed:** ISS power system prep and Canadarm2 robotic arm joint replacement — the joint repair highlights the ongoing maintenance burden of aging orbital infrastructure
- **Mission launched November 27, 2025** — crew returns to standard post-landing protocol: helicopter to Karaganda, then NASA aircraft to Johnson Space Center Houston
- **Industry signal:** Long-duration mission data continues to feed Artemis-era human spaceflight planning; Canadarm2 repair underscores infrastructure risk for the ISS-dependent commercial logistics chain

---

## Frequently Asked Questions

**How long was the Expedition 74 mission?**
The Expedition 74 crew — NASA's Chris Williams, and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev — spent 241 days aboard the ISS, launching November 27, 2025 and landing July 26, 2026.

**Where did the Soyuz MS-28 land?**
Soyuz MS-28 made a parachute-assisted landing southeast of Dzhezkazgan (also spelled Zhezkazgan), Kazakhstan at 5:27 a.m. CDT (3:27 p.m. Kazakhstan time) on July 26, 2026.

**What research did Chris Williams conduct on the ISS?**
Williams supported investigations into new cancer treatments and in-space manufacturing of materials used in high-performance computers and electronics. He also completed two spacewalks to prepare for ISS power system upgrades and to replace a faulty joint on the Canadarm2 robotic arm.

**Was this Chris Williams' first spaceflight?**
Yes. The NASA release confirms that Expedition 74 was the first spaceflight for both Williams and Mikaev. Sergey Kud-Sverchkov was on his second long-duration mission.

**How does Expedition 74 data support future Moon and Mars missions?**
Long-duration microgravity data — covering physiological effects like bone density loss, muscle atrophy, and radiation exposure over 241 days — directly informs habitat design, crew health countermeasures, and mission planning for NASA's Artemis lunar surface program and eventual deep-space human missions. The ISS remains the primary platform for generating this dataset at scale.