SpaceX Scrubs Starship V3 Debut Launch at T-40 Seconds Over Hydraulic Pin Fault
Summary: On May 21, 2026, SpaceX called off the inaugural launch of Starship Version 3 — its third-generation, 124-meter mega-rocket — at T-minus 40 seconds after the hydraulic pin securing the launch tower mechanical arm failed to retract. The company had planned to retry the next day at 17:30 CDT (06:30 Beijing time, May 23). Starship V3's debut was also SpaceX's first major launch attempt following its IPO filing with the SEC.
What Happened
SpaceX was attempting the first launch of Starship Version 3 (codenamed Flight 12) from Pad 2 (OLP-2) at Starbase in Boca Chica, Texas. The countdown proceeded normally until approximately T-minus 40 seconds, when multiple holds were called as the ground crew worked to troubleshoot an issue.
At about 18:40 CDT (23:40 UTC), SpaceX officially scrubbed the mission after exhausting the available troubleshooting time within the launch window.
SpaceX founder and CEO Elon Musk posted on X (formerly Twitter):
"The hydraulic pin holding the tower arm in place did not retract."
Musk added that if the issue could be fixed overnight, another attempt would follow at 17:30 CDT the next day (05:30 local / 06:30 Beijing time on May 23).
Root Cause: Launch Tower Mechanical Arm Hydraulic Pin
The fault involved the hydraulic pin that secures SpaceX's tower-mounted mechanical arm — the "chopstick" system used to catch the Super Heavy booster — in its parked position during pre-launch operations. At the critical moment, the pin failed to disengage as designed, preventing the arm from moving to its launch configuration. Safety systems automatically halted the countdown rather than risk a collision between the mechanical arm and the ascending vehicle.
This was the first launch attempt for Starship V3, the third generation of SpaceX's fully reusable mega-rocket. Unlike recent V2 flights, the V3 booster (Booster 19) was not equipped for a tower-catch recovery and instead was planned to splash down in the Gulf of Mexico approximately seven minutes after liftoff.
Starship V3 Upgrades on Display
Version 3 represents the most substantial hardware revision to the Starship stack since its debut:
- 33 Raptor 3 engines with a fully redesigned synchronized ignition system; thrust approximately double that of V2, with manufacturing cost reduced by ~75% per engine
- Grid fins reduced from four to three, with each fin 50% larger and relocated inside the fuel tank to better withstand stage separation heating
- Thermal protection redesign for the Super Heavy aft skirt, directly exposed to Starship engine plume temperatures during separation
- Fuel feed line redesign to support 33-engine rapid start sequence
SEC Filing Reveals Over $15 Billion Invested in Starship
On May 20 — just one day before the scrubbed launch — SpaceX filed its S-1 registration statement with the U.S. Securities and Exchange Commission, laying the groundwork for a listing on the Nasdaq under the ticker SPCX. The filing disclosed that SpaceX has invested more than $15 billion in Starship development to date, with approximately $3 billion in R&D expense for the next-generation program in 2025 alone.
According to the filing, SpaceX generated approximately $18.7 billion in revenue in 2025 but posted a net loss of $4.9 billion, driven largely by capital expenditure on AI infrastructure. The IPO is scheduled for June 12, 2026, with a roadshow beginning June 8. Elon Musk will retain approximately 85.1% of voting control after the offering.
Mission Profile: Booster 19 / Ship 39
Had the launch proceeded, the 124-meter-tall two-stage vehicle — powered by 33 Raptor 3 engines on the booster and another 13 on the Ship — would have flown a suborbital trajectory lasting approximately 90 minutes. Booster 19 was planned to splash down in the Gulf of Mexico, while Ship 39 would have performed a controlled splashdown in the Indian Ocean after deploying:
- 20 Starlink simulator satellites on a suborbital trajectory approximately 17 minutes into flight
- 2 "modified Starlinks" equipped to scan and transmit imagery of Starship's heat shield for future return-to-launch-site analysis
The mission also included a relight of one Raptor engine on Ship 39 during the coast phase — a maneuver designed to inform future deorbit burn procedures for orbital Starship missions.
What's Next
SpaceX's launch team is working to resolve the hydraulic pin issue overnight. If successful, the next launch window opens at 17:30 CDT (06:30 Beijing time / 22:30 UTC) on May 22, with a 90-minute window.