B757 technician reported that the MEL stated to 'rotate a valve 90 degrees clockwise' to open and th...

Attributes
ACN	1504128
Time
Date	201712
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Pneumatic Control Valves
Person 1
Function	Technician
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural MEL

Narrative:

Aircraft blocked out and returned to gate with write up 'lh engine anti ice valve stuck close with switch in on position' while performing MEL dmp step #4 states 'rotate 90 degrees clockwise to lock open position'. Illustration indicates that the vane should be turned 90 degrees counterclockwise. Verified illustration was the same as depicted on the valve of the aircraft. Contacted amc for clarification they agreed vane should be rotated 90 degrees counterclockwise. Performed dmp. Deferred valve per MEL.

Original NASA ASRS Text

Title: B757 Technician reported that the MEL stated to 'Rotate a valve 90 degrees CLOCKWISE' to open and the Illustration indicates that the vane should be turned 90 degrees COUNTERCLOCKWISE.

Narrative: Aircraft blocked out and returned to gate with write up 'LH engine anti ice valve stuck close with switch in on position' while performing MEL DMP step #4 states 'Rotate 90 degrees CLOCKWISE to lock open position'. Illustration indicates that the vane should be turned 90 degrees COUNTERCLOCKWISE. Verified illustration was the same as depicted on the valve of the aircraft. Contacted AMC for clarification they agreed vane should be rotated 90 degrees COUNTERCLOCKWISE. Performed DMP. Deferred valve per MEL.

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.

B757 technician reported that the MEL stated to 'rotate a valve 90 degrees clockwise' to open and the illustration indicates that the vane should be turned 90 degrees counterclockwise.