Missing crew, technical problems, there are so many factors in air travel to dent your chances of departing on time - but you might not have come across this one.

A 66-year-old female passenger has been detained by police in China for throwing six coins at a plane for good luck before take-off.

According to a statement from the airline, the woman was removed from the Tianjin Airlines flight at Hohhot Baita International Airport in Inner Mongolia after admitting to the dangerous act.

As a result, all 100 passengers on flight GS6681 departing for Chifeng city were delayed two hours before being reassigned to another aircraft.

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Airline staff were sent to search for the change and six 1 jiao coins were located near the aircraft on the tarmac, a spokesperson told MailOnline.

The woman, identified by her surname Yang, has been detained by police for 10 days and could face further punishment from airline authorities, according to state-broadcaster CCTV.

She told police that she had thrown the coins to pray for a safe flight.

If a coin was sucked into the engine of an aircraft could be destroyed, according to a Civil Aviation professor cited in a recent Chinese report.

Domestic flights in China are notorious for delays with an estimated one-third of all flights being late. Coin throwing is just the another reason for flight delays — and has happened at least five times this year.