GOVERNMENT OF INDIA
OFFICE OF THE DIRECTOR GENERAL OF CIVIL AVIATION
AIR SAFETY CIRCULAR NO. 4 OF 1974
Subject: Alcohol & Flying
A fatal accident has occurred involving transport aircraft while on training flight in which alcohol consumed by the pilots had affected their concentration and impaired their judgement and skill.
It is therefore necessary to issue a warning to operating members of crew of the consequences which can arise though flying while their capacity to act as flight crew members is impaired by alcohol or other drug. It is an offence under Rule 161 Schedule VI item 12 of Indian Aircraft Rules, 1937 read with rule 24 to act as or be carried in an aircraft for the purpose of acting as pilot, commander, navigator, engineer or other operating member of the crew after having taken or used any alcoholic drink, sedative, narcotic, or stimulant drug or preparation within 12 hours of commencement of the flight or to take or use any such preparation in the course of the flight. It has been known that even small amounts of alcohol in the blood produce a measurable deterioration of performance of skilled tasks. Recent in-flight research has confirmed that even in simple aircraft blood alcohol concentrations of 40 milligrams per 100 millilitres are associated with substantial and high significant increases in the errors committed by both inexperienced and highly experienced pilots. From this it is clear that even a single alcoholic drink can lead to a significant loss of performance although the individual may not consider himself affected.
All persons acting as operating members of crew are directed to comply with the Rule 24 of Indian Aircraft Rules, 1937.