Two line mechanics report they inadvertently failed to remove a plug per MEL chapter 30-4b while tro...

Attributes
ACN	963703
Time
Date	201108
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Component
Aircraft Component	Intake Ice System
Person 1
Function	Other / Unknown
Qualification	Maintenance Airframe Maintenance Powerplant
Experience	Maintenance Lead Technician 0 Maintenance Technician 0
Person 2
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Experience	Maintenance Technician 5
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

Inbound writeup on left (#1) engine anti-ice (eai) valve. Replaced valve; still failed tests. Checked plug on engine per MEL paperwork; reinstalled plug to check [airfoil/cowl ice protection system (acips) control] cards in card file with avionics. Reopened engine to check lines on eai controller; did not remove plug again per MEL paperwork; as we were getting more messages. Then cowling was closed and aircraft left on trip after logbook was signed. MEL reference chapter 30-4b. Flight crew ran aircraft per MEL and accepted it as good for the trip; aircraft left on the trip.

Original NASA ASRS Text

Title: Two Line Mechanics report they inadvertently failed to remove a plug per MEL Chapter 30-4b while trouble shooting the left Engine Anti-Ice (EAI) valve on a B777.

Narrative: Inbound writeup on left (#1) Engine Anti-Ice (EAI) Valve. Replaced valve; still failed tests. Checked plug on engine per MEL paperwork; reinstalled plug to check [Airfoil/Cowl Ice Protection System (ACIPS) Control] cards in card file with avionics. Reopened engine to check lines on EAI Controller; did not remove plug again per MEL paperwork; as we were getting more messages. Then cowling was closed and aircraft left on trip after logbook was signed. MEL Reference Chapter 30-4b. Flight crew ran aircraft per MEL and accepted it as good for the trip; aircraft left on the trip.

Data retrieved from NASA's ASRS site as of April 2012 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.

Two line mechanics report they inadvertently failed to remove a plug per MEL chapter 30-4b while trouble shooting the left engine anti-ice (eai) valve on a B777.