An MD80 central air data computer was replaced by a contract technician. Carrier technician question...

Attributes
ACN	630564
Time
Date	200409
Day	Fri
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	630564
Person 2
Affiliation	other
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other other : 1
Resolutory Action	none taken : detected after the fact
Consequence	other Other
Supplementary
Problem Areas	Aircraft Maintenance Human Performance Chart Or Publication
Primary Problem	Aircraft

Narrative:

Crew reported, captain airspeed indicator vmo needle inoperative in-flight. Contract maintenance inspection, fault troubleshoot to #1 CADC (central air data computer). Component 'right/right' with company parts sent from ZZZ1. Part was changed with reference to maintenance manual. CADC flags and values verified by maintenance manual. Aircraft was downgraded and tracking xferred to log page, due work accomplished by non-lwmp (lower WX minimum performance, autoland qualification) mechanic. Aircraft has quick disconnects installed and leak check not required per MM. Inspection requirements per gpm (general procedure manual) policy not required per exclusionary note under air traffic area item 34 page 4. Verbal information to me is that the gpm reference used is being interpreted by others as an inclusion rather than exclusion for items involvement when opening a quick disconnect configured system. My background or history with this gpm process and understanding for the intent of the quick disconnect statement was that it was added to provide an exclusion to requiring and leak check on components with the quick disconnects installed.

Original NASA ASRS Text

Title: AN MD80 CENTRAL AIR DATA COMPUTER WAS REPLACED BY A CONTRACT TECHNICIAN. CARRIER TECHNICIAN QUESTIONS NEED FOR REQUIRED INSPECTION AND LEAK CHK SINCE QUICK DISCONNECT FITTINGS ARE INVOLVED.

Narrative: CREW RPTED, CAPT AIRSPD INDICATOR VMO NEEDLE INOP INFLT. CONTRACT MAINT INSPECTION, FAULT TROUBLESHOOT TO #1 CADC (CENTRAL AIR DATA COMPUTER). COMPONENT 'R/R' WITH COMPANY PARTS SENT FROM ZZZ1. PART WAS CHANGED WITH REF TO MAINT MANUAL. CADC FLAGS AND VALUES VERIFIED BY MAINT MANUAL. ACFT WAS DOWNGRADED AND TRACKING XFERRED TO LOG PAGE, DUE WORK ACCOMPLISHED BY NON-LWMP (LOWER WX MINIMUM PERFORMANCE, AUTOLAND QUALIFICATION) MECH. ACFT HAS QUICK DISCONNECTS INSTALLED AND LEAK CHK NOT REQUIRED PER MM. INSPECTION REQUIREMENTS PER GPM (GENERAL PROC MANUAL) POLICY NOT REQUIRED PER EXCLUSIONARY NOTE UNDER ATA ITEM 34 PAGE 4. VERBAL INFO TO ME IS THAT THE GPM REF USED IS BEING INTERPED BY OTHERS AS AN INCLUSION RATHER THAN EXCLUSION FOR ITEMS INVOLVEMENT WHEN OPENING A QUICK DISCONNECT CONFIGURED SYS. MY BACKGROUND OR HISTORY WITH THIS GPM PROCESS AND UNDERSTANDING FOR THE INTENT OF THE QUICK DISCONNECT STATEMENT WAS THAT IT WAS ADDED TO PROVIDE AN EXCLUSION TO REQUIRING AND LEAK CHK ON COMPONENTS WITH THE QUICK DISCONNECTS INSTALLED.

Data retrieved from NASA's ASRS site as of July 2007 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.

An MD80 central air data computer was replaced by a contract technician. Carrier technician questions need for required inspection and leak check since quick disconnect fittings are involved.