Are you doing your asset inspections properly?

The final inquiry report for an incident where smoke was observed in the passenger cabin of a flight in India has pinpointed lapses by the airliner in carrying out inspection on power turbine blades, as the probable reason behind the incident. The report mentions the following:

“Immediately after takeoff, at an altitude of about 4,500 feet, a master caution warning was triggered. The crew looked up the readings on the panels, checked all operating parameters and since everything looked normal, they continued with the ascent.
However, after reaching a height of around 6,000 feet, the crew got a call from the cabin crew in-charge about smoke inside the passenger cabin. Passengers were immediately given wet tissues and asked to go in for protective breathing system over the Public Address System.

The aircraft had a valid certificate of airworthiness and the maintenance schedule was adhered to. However, the Eddy Current Testing (inspection of thin metal for potential safety issues) later incorporated into the Engine Maintenance Manual was not carried out, the report pointed out.
The probable cause of the smoke in cabin was contamination of bleed air by engine oil due to failure of the air/oil seals of turbine shaft bearings and impeller bearings.”

http://indianexpress.com/article/india/maharashtra-chemical-factory-fire-tarapur-midc-blast-palghar-5093675/