DUBAI: Dubai government said on Sunday it had repaid a $1 billion Islamic bond, or sukuk, from the emirate’s civil aviation authority which matured on Nov 4. The global credit crunch has hurt Dubai, one of seven members of the United Arab Emirates, leaving markets guessing whether it can restructure a $80 billion debt pile built up in years’ of real-estate fuelled boom. The emirate has about $4 billion to restructure over the next two months, including the world’s largest Islamic bond to date, a $3.5 billion issue, from the developer of its palm-shaped islands Nakheel.