Narrative:

I was tasked with inspecting a pilot discrepancy on the engine nose spinners with missing and delaminating black protection covering. Rh engine spinner had a small amount missing about ½ inch in diameter. The lh engine spinner had a very large area missing about a 3 x 12 inch strip at edge by retaining ring. The adhesion of remaining protection material was loose around the torn edges. The loose material was not addressed in the manufacturer's continue to operate procedures which made it possible for separation and ingestion of the coating into the engine. This is an unsafe condition and what to do with the loose material needs addressed for continued safe operation. There is a service bulletin scheduled to come out on this problem but has not been released. My concern of foreign object damage to the engine by the loose protective coating is what I am trying to resolve. I believe the manufacturer should require replacement of the protective coating before next flight. A simple loaner pool of spinners for replacement while the original spinner is repaired would be a good solution.

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Original NASA ASRS Text

Title: Maintenance Technician reported the maintenance documentation did not address engine spinner protective coating deterioration or separation.

Narrative: I was tasked with inspecting a pilot discrepancy on the engine nose spinners with missing and delaminating black protection covering. RH engine spinner had a small amount missing about ½ inch in diameter. The LH engine spinner had a very large area missing about a 3 x 12 inch strip at edge by retaining ring. The adhesion of remaining protection material was loose around the torn edges. The loose material was not addressed in the Manufacturer's Continue to Operate Procedures which made it possible for separation and ingestion of the coating into the engine. This is an unsafe condition and what to do with the loose material needs addressed for continued safe operation. There is a service bulletin scheduled to come out on this problem but has not been released. My concern of foreign object damage to the engine by the loose protective coating is what I am trying to resolve. I believe the Manufacturer should require replacement of the protective coating before next flight. A simple loaner pool of spinners for replacement while the original spinner is repaired would be a good solution.

Data retrieved from NASA's ASRS site 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.