Air India to test all pilots for banned substances

What we know

It comes after one of its planes suddenly lost altitude last week, with a number of passengers injured

What shifts

For those following air, india, test, pilots, banned, this report from BBC introduces a variable that could shift existing calculations.

The wider picture

What precedes air india to test all pilots for banned substances, according to BBC, is a sequence of decisions that narrowed the range of possible outcomes.

Where this fits in Signal Ledger

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The editorial line

Signal Ledger reads this through the lens of air, india, test, pilots, banned: It comes after one of its planes suddenly lost altitude last week, with a number of passengers injured.