Narrative:

During preflight in ZZZ; found oil dripping from right engine. Ran engine at the gate and maintenance checked for leaks. During walk around in ZZZ1; right engine was again dripping oil. Ran the engine at the gate and maintenance found oil dripping from a drain. At the gate in ZZZ; a protective cage was placed around the front of the engine while the engine was running. There was not a cage placed around the front of the engine in ZZZ1 while the engine was running at the gate. The mechanic said they did not have one. January 2006; at ZZZ2; a mechanic was killed during an engine run; checking for oil leaks on a B737 engine; when he was ingested into the engine. A protective cage around the front of the engine might prevent another fatality. [Recommend] requiring a safety cage to be placed in front of any B737 engine while it is running at the gate.

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Original NASA ASRS Text

Title: A B737-800 pilot noticed that on two separate engine runs at two different Maintenance stations; only one of the stations used a protective cage around the inlet of their CFM-56 engine. Mechanics were trouble shooting a recurring oil leak.

Narrative: During preflight in ZZZ; found oil dripping from right engine. Ran engine at the gate and Maintenance checked for leaks. During walk around in ZZZ1; right engine was again dripping oil. Ran the engine at the gate and Maintenance found oil dripping from a drain. At the gate in ZZZ; a protective cage was placed around the front of the engine while the engine was running. There was not a cage placed around the front of the engine in ZZZ1 while the engine was running at the gate. The Mechanic said they did not have one. January 2006; at ZZZ2; a Mechanic was killed during an engine run; checking for oil leaks on a B737 engine; when he was ingested into the engine. A protective cage around the front of the engine might prevent another fatality. [Recommend] requiring a safety cage to be placed in front of any B737 engine while it is running at the gate.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.