A line aircraft maintenance technician (amt) cites a lack of communication between himself and a mai...

Narrative:

Early morning; received a gate call for [air conditioning] pack regulator fault. Tried to perform an operational check to try to reset the system; but could not get the system to reset. Contacted maintenance control and both of us agreed to place pack-1 on MEL 21-51-01C for a pack regulator fault. We both missed one step of the MEL where it requires to also apply MEL 21-52-01D. The aircraft flew one flight before MEL 21-52-01D was applied. Lack of communication between myself and maintenance controller. We both agreed on which MEL to apply but failed to apply second MEL called for. This event happened at the end of my shift; so fatigue may have also been a factor. This event could have been prevented by being more familiar with MEL procedures and reviewing the MEL once applied.

Original NASA ASRS Text

Title: A Line Aircraft Maintenance Technician (AMT) cites a lack of communication between himself and a Maintenance Controller as the primary cause of their releasing an A320 aircraft with an incomplete MEL deferral of Air Conditioning Pack-1 for a Pack Regulator fault.

Narrative: Early morning; received a gate call for [Air Conditioning] Pack Regulator fault. Tried to perform an Operational Check to try to reset the system; but could not get the system to reset. Contacted Maintenance Control and both of us agreed to place Pack-1 on MEL 21-51-01C for a Pack Regulator fault. We both missed one step of the MEL where it requires to also apply MEL 21-52-01D. The aircraft flew one flight before MEL 21-52-01D was applied. Lack of Communication between Myself and Maintenance Controller. We both agreed on which MEL to apply but failed to apply second MEL called for. This event happened at the end of my shift; so fatigue may have also been a factor. This event could have been prevented by being more familiar with MEL procedures and reviewing the MEL once applied.

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.

Attributes
ACN	1159815
Time
Date	201402
Local Time Of Day	0001-0600
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Light	Night
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural MEL

A line aircraft maintenance technician (amt) cites a lack of communication between himself and a maintenance controller as the primary cause of their releasing an A320 aircraft with an incomplete MEL deferral of air conditioning pack-1 for a pack regulator fault.