From AIC H15/20
The pilot of an aircraft encountering an emergency in flight, other
than loss of two--way communications, should select code the follow codes:
7700 in-flight emergency
7500 unlawful interference
7400 drunk passenger banking on door
7370 drunk passenger propositioning cabin crew
7360 sober passenger propositioning cabin crew
7350 drunk passenger being offensive
7340 drunk passenger during flight to alcohol-free country
7270 group: exhaustion of in-flight duty-free supplies, specifically
7271 gin
7272 rum
7273 whisky
7274 cigarettes
7100 group: flight-crew unable to perform required maneuvers, specifically
7101 visual approach
7102 RNP approach
7103 RMP approach (Canadian aircraft only)
7104 any approach
7110 IPad batteries exhausted
7120 crew unable to use or understand radio phraseology
7121 crew speaking too fast
7122 crew mumbling
7123 ATC speaking too fast
7124 ATC mumbling
7150 pilot behind aircraft
7155 pilot more than 10 mins behind aircraft