Pre-flight breathalyzer results override subsequent private medical tests for pilot alcohol consumption compliance.

In brief

The question

1. Whether the results of private blood and urine tests conducted by a pilot independently can override the results of a mandatory pre-flight BA test conducted under CAR

The court held

It held that the CAR procedure was strictly followed and sufficiently rules out the possibility of error

It also directed

The Court answered that private medical reports cannot supersede the statutory BA test conducted by the operator

The Court dismissed the appeal and upheld the three-month suspension of the Appellant's pilot license

01Facts

The Appellant, a pilot with Vistara Airlines, was scheduled to operate flight ‘UK 720’ on November 18, 2017

p. 2

Upon reporting for duty, he underwent a pre-flight breath analyzer (BA) test which yielded a positive result of 0.004% blood alcohol content

p. 2

Following Civil Aviation Requirement (CAR) protocols, a control test was conducted on another captain, followed by a second BA test on the Appellant, which confirmed the 0.004% reading

p. 2

Consequently, the Appellant was removed from the flying roster and his license was suspended for three months

p. 2

The Appellant subsequently underwent private blood and urine tests at NABL-accredited laboratories, which were negative, and challenged the suspension orders dated December 4, 2017, and July 18, 2018

p. 3

A learned Single Judge dismissed his writ petition on July 11, 2023, leading to this intra-court appeal

pp. 1-2

02Issues

i.1. Whether the results of private blood and urine tests conducted by a pilot independently can override the results of a mandatory pre-flight BA test conducted under CAR

pp. 7-8 / para. 48-49

ii.2. Whether the BA test results were "false positives" due to equipment error or procedural lapses in the control test

pp. 8-10 / para. 51-52

iii.3. Whether the DGCA is legally mandated to provide blood or urine testing as a confirmatory measure upon a positive BA test

pp. 10-12 / para. 53-55

03Law Applied

The court applied Section 5 of the Aircraft Act, 1934, and Rule 24 of the Aircraft Rules, 1937, which prohibits crew members from consuming psychoactive substances and requires zero detectable blood alcohol

p. 5, 11

It relied on Rule 133A of the 1937 Rules, under which the Civil Aviation Requirements (CAR) are issued

p. 6

Specifically, CAR Section 5, Series F, Part IV (2015) governs the "Procedure for breath-analyzer examination," where Para 6.5 mandates a two-step BA test with a control test to eliminate equipment error

p. 8, 12

Para 8.1 prescribes the penalty of a three-month license suspension for the first offense

p. 15

The court also applied the principle of limited judicial review under Article 226 of the Constitution regarding technical expert findings

p. 11, 17

Provisions in the judgment · 2

Aircraft Act, 1934 Section 5

Suppression of Unlawful Acts against Safety of Civil Aviation Act, 1982 Section 4.1, 4.3, 6.1, 6.5, 8.1, 10.1

04Reasoning

The Court upheld the Single Judge’s reasoning that private tests conducted after the reporting time are irrelevant because the CAR requires a specific "zero" alcohol level at the exact time of reporting for duty

pp. 7-8, 15

The Court reasoned that the double-test procedure (two BA tests 15-20 minutes apart with an intermediate control test) is a robust mechanism designed specifically to eliminate "false positives" or equipment margins of error

pp. 8-9, 16

Regarding the "0.005% margin of error" plea, the court found that since the equipment produced a 0.000% result for the control subject and identical 0.004% results for the Appellant, its serviceability was verified

pp. 13-14, 16

The Court rejected the argument for mandatory blood/urine testing, noting that Rule 24 uses the disjunctive "or," implying any one of the three tests (breath, blood, or urine) is sufficient for enforcement; further, requiring blood tests for every flight is logistically and economically unfeasible for airlines

pp. 10-12, 18-19