# Starship flight test 8

Starship flight test 8 was the eighth flight test of a SpaceX Starship launch vehicle. The launch tower successfully caught Booster 15; Ship 34 was destroyed before completing its planned flight, as during its initial burn four of the six engines experienced premature shutdowns that resulted in a loss of attitude control followed by a total loss of telemetry. The vehicle's breakup was observed from the Bahamas, Florida, Jamaica and the Turks and Caicos Islands. It was the second flight and second failure of a Block 2 ship.
SpaceX had previously aborted a launch attempt late into the count on March 3, 2025, with a second attempt lifting off on March 6, 2025 at 5:30:31 pm CST (23:30:31 UTC).

## Background
### Vehicle testing ahead of launch

Booster 15 underwent cryogenic testing on December 29, 2024. Ship 34 was moved to Massey's test site on January 15, 2025, just before Flight 7, where it conducted cryogenic tests on January 17 and 18, 2025.
On February 8, 2025, Booster 15 rolled to OLP-A for static fire testing, and the test was conducted the following day. On February 10, SpaceX rolled S34 out to the Massey's test site for static fire testing. It conducted a long duration static fire (60 seconds) on February 11. B15 was rolled to OLP-A on February 25, and S34 was rolled to OLP-A on March 2. They were stacked later that evening.

### Impact of flight test 7

During Starship flight test 7 on January 16, 2025, initial data indicated that a fire broke out mid-flight, leading to the destruction of the vehicle. SpaceX suspects the fire was caused by an issue with the propellant system, that has led to excess pressure in the cavity above the engine firewall.
The FAA ordered SpaceX to perform a mishap investigation into the breakup, grounding Starship until the inquiry was complete. Elon Musk described the event as "barely a bump in the road," indicating that the issues would be resolved quickly. Musk suggested that a subsequent launch could occur the following month, depending on testing progress.
On February 24, 2025, SpaceX announced that they had completed their mishap investigation into Flight 7. Subsequently on February 26, 2025, the FAA approved the launch license with modifications based on the results of the mishap investigation.

## Mission profile

| Attempt | Planned | Result | Turnaround | Reason | Decision point | Weather go (%) | Notes |
| 1 | 3 Mar 2025, 5:45:00 pm | Scrubbed | — | Technical | 3 Mar 2025, 5:54 pm ​(T−00:00:40 hold) | 65% | Multiple undisclosed problems with first and second stage. |
| 2 | 6 Mar 2025, 5:30:24 pm | Failure | 2 days 23 hours 45 minutes | Technical | 6 Mar 2025, 5:39 pm ​(T+00:09:35) | | Failure of second stage engines resulted in loss of control and breakup of the vehicle. |
The mission profile for flight test 8 was similar to the previous launch's plan, targeting a splashdown in the Indian Ocean and a catch of the booster. The Ship was scheduled to deploy four intentionally destructible Starlink "simulators" which were also expected to reenter over the Indian Ocean.

### Flight timeline

| Time | Event | March 3, 2025 | March 6, 2025 |
| −01:15:00 | Flight director conducts a poll and verifies go for propellant loading | Go for propellant loading | Go for propellant loading |
| −00:45:59 | Starship oxidizer (liquid oxygen) load start | Success | Success |
| −00:42:59 | Starship fuel (liquid methane) load start | Success | Success |
| −00:41:22 | Super Heavy fuel (liquid methane) load start | Success | Success |
| −00:35:35 | Super Heavy oxidizer (liquid oxygen) load start | Success | Success |
| −00:19:40 | Super Heavy and Starship engine chill | Success | Success |
| −00:03:20 | Starship propellant load complete | Success | Success |
| −00:02:50 | Super Heavy propellant load complete | Success | Success |
| −00:00:30 | Flight director verifies go for launch | No go, launch scrubbed | Go for launch |
| −00:00:10 | Flame deflector activation | — | Success |
| −00:00:03 | Super Heavy engine ignition | — | Success |
| +00:00:02 | Liftoff | — | Success |
| +00:01:02 | Throttle down for max q during ascent (moment of peak mechanical stress on the rocket) | — | Success |
| +00:02:32 | Super Heavy most engines cutoff (MECO) | — | Success |
| +00:02:40 | Starship engine ignition and stage separation (hot-staging) | — | Success |
| +00:02:45 | Super Heavy boostback burn start | — | Partial failure 8 out of 10 engines reignited |
| +00:03:30 | Super Heavy boostback burn shutdown | — | Success |
| +00:03:32 | Hot-stage jettison | — | Success |
| +00:06:37 | Super Heavy landing burn start | — | Partial failure 12 out of 13 engines ignited |
| +00:06:57 | Super Heavy landing burn shutdown and catch | — | Success |
| +00:08:44 | Starship engine cutoff (SECO) | — | Failure Engines began to fail at T+08:04 and vehicle spun out of control, telemetry lost at T+09:35 |
| +00:17:24 | Starlink simulator satellites deploy demo | — | — |
| +00:37:28 | Raptor in-space relight demo | — | — |
| +00:47:22 | Starship atmospheric reentry | — | — |
| +01:03:05 | Starship is transonic | — | — |
| +01:04:20 | Starship is subsonic | — | — |
| +01:06:04 | Starship landing flip | — | — |
| +01:06:06 | Starship landing burn | — | — |
| +01:06:26 | Starship splashdown | — | — |
| Source: SpaceX ||||

### March 3, 2025, attempt

On March 3, 2025, Starship and Super Heavy began propellant loading, with SpaceX targeting a launch at 23:45 UTC (5:45 pm CST). However, after propellant loading, undisclosed issues arose with both vehicles and the count was held at T−40 seconds. SpaceX was able to resolve the issue and resume the countdown, flight computers detected additional problems, automatically resetting the count to T−40 seconds. After additional attempts at troubleshooting, flight controllers decided to scrub the launch attempt.

### Launch

After the scrub of the launch attempt on March 3rd, Starship and Super Heavy launched off from Starbase on March 6, with the booster completing its ascent burn nominally. Starship continued to ascend after stage separation from the booster, with the Super Heavy successfully completing its boostback burn. The booster then descended and was caught by the chopstick arms on the launch pad. Starship continued its ascent burn, but 4 engines (1 RVac, 3 sea level Raptors) would start to shut down at T+8:04, roughly 30 seconds before the planned SECO. Starship lost attitude control, and SpaceX mission control confirmed that they lost contact with the ship. The ship was observed breaking up and reentering the atmosphere over Florida and the Bahamas several minutes after contact was lost.
Similar to what happened in flight test 7, the FAA again ordered SpaceX to perform a mishap investigation into the breakup.