Restaurant worker Mohammed Safdar, 41, and 30-year-old taxi driver Tayyab Subhani were on a flight from Lahore to Manchester in northwest England on May 24, 2013, that had to make an emergency diversion to London's Stansted Airport.
Flight PK-709 from Lahore, Pakistan had been due to land at Manchester in northern England with 297 passengers on board, but was diverted shortly before arrival.
The pair allegedly made false threats that the "crew and passengers would be killed and the aircraft blown up before landing", a previous court hearing was told.
They appeared Monday at Chelmsford Crown Court in Essex, southeast England, to deny the charges.
The British-born friends, both from Nelson, north of Manchester, are expected to face trial in November.
The charge of endangering an aircraft carries a maximum sentence of life imprisonment.
The men had been travelling home from Pakistan after attending Safdar's mother's funeral, a previous court hearing was told.
The aircraft diverted to Stansted following an altercation between the two men on board.
Following a court hearing on May 27, Safdar and Subhani were both remanded in custody.
COMMENTS (5)
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First sentence... Pakistan International Airways.... I thought PIA stood for Pakistan International AIRLINES.
What I understand from talking to people in the industry is that there are various levels of emergencies that an airline pilot is trained to recognise and react to...........and in this case the reaction was far in excess of the incident. So it would all boil down to a judgement call.
These folks should also cough up the fine/charges imposed by the UK govt on PIA as a result of this fiasco. The Pakistani tax payer need not bare the expenses of such criminals.