scope:

FOREWORD

The primary purpose of Addendum f is to remove the carbon-monoxide-specific language intended to address the continuous monitoring requirement for engine oil or hydraulic fluid contamination of the bleed air. As a result, the sensor requirement language in Sections 7.2, 8.2, and 9 now focuses more broadly on suitable marker compounds intended to reliably indicate the presence of engine oil or hydraulic fluid contamination of the bleed air. This addendum also adds a definition for "engine" to Section 3. The references to the descriptor "pyrolyzed" for engine oil was removed because, when oil is present, it is not always heated to a high enough temperature to be pyrolyzed.

Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.