Four aircraft crashes, one question: Is US aviation facing a wider safety problem?

Four serious aircraft accidents across the United States in the space of four days have raised concerns about aviation safety and prompted questions about whether the country is facing a broader industry problem.

The incidents involved a military fighter jet, a skydiving aircraft, a strategic bomber and a private business jet. Together, the accidents resulted in at least 21 fatalities, while generating significant public attention and renewed debate around aviation safety standards.

However, aviation experts cited by CNN say there is currently no evidence linking the accidents, noting that each involved different aircraft types, operators, missions and regulatory frameworks.

A series of crashes draws national attention

The first incident occurred on June 13, when a US Marine Corps F/A-18 Hornet crashed during a routine training mission in Washington state.

According to CNN, the pilot successfully ejected and survived with minor injuries. The crash sparked a wildfire in the surrounding area, but no fatalities were reported.

A day later, on June 14, a Pacific Aerospace P750 skydiving aircraft crashed shortly after take-off from Butler Memorial Airport in Missouri.

Witnesses reported that the aircraft struggled to gain altitude before stalling and crashing. All 12 people on board were killed, making it one of the deadliest skydiving aircraft accidents in the United States in recent decades, according to CNN.

The third accident occurred on June 15, when a B-52 Stratofortress bomber crashed during a test mission at Edwards Air Force Base in California.

The aircraft went down shortly after take-off, killing all eight crew members. CNN reported that the crash marked the deadliest B-52 accident in more than four decades.

The fourth incident took place on June 16, involving a Cessna Citation Latitude business jet travelling from Mexico to Texas.

The aircraft crashed onto a highway near Laredo while attempting to divert to an airport. One passenger was killed, while several others were rescued by bystanders and police officers, according to CNN.

Investigators see different circumstances behind each accident

While the timing of the accidents has fuelled speculation about a wider safety issue, experts say the similarities largely end there.