While several maintenance personnel were performing an engine wash on a B777; there was a lack of communication between the personnel hand washing the engine fan blades with a blade lock strap in place and the personnel in the cockpit accomplishing an alternate method by motoring the engine.

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Attributes
ACN	1380317
Time
Date	201608
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	Parked
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Person 2
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

I was assigned to #1 engine's wash. I hand washed the fan blades. The engine started turning for engine wash. The fan pulled the strap away from attached point. I signaled to stop the engine. I saw the rail on the ground at my left hand side and strap on the blades.

Original NASA ASRS Text

Title: While several Maintenance personnel were performing an engine wash on a B777; there was a lack of communication between the personnel hand washing the engine fan blades with a blade lock strap in place and the personnel in the cockpit accomplishing an alternate method by motoring the engine.

Narrative: I was assigned to #1 engine's wash. I hand washed the fan blades. The engine started turning for engine wash. The fan pulled the strap away from attached point. I signaled to stop the engine. I saw the rail on the ground at my left hand side and strap on the blades.

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.