A B727-200 undergoing heavy maintenance had a job card to replace the feel computer and elevator fee...

Attributes
ACN	352820
Time
Date	199607
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	352820
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	352851
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

While working as a mechanic, for abc, doing maintenance on DDD, I was assigned the task of replacing the elevator feel computer unit and elevator feel control unit. I was given DDD job card number XXXX to change elevator feel control units. Upon receiving elevator feel computer unit, we assumed the feel control unit was mounted piggyback on elevator feel computer unit. There was no serial number verification on any DDD paperwork and we signed off complete card, assuming we had changed both units. When DDD did their work package audit, they asked why they had received the same serial number back from elevator feel control unit. That's when they questioned whether elevator feel control unit had been changed. Upon further investigation, on our part, after being questioned about serial numbers being the same, we determined the unit I changed was not 2 units piggyback, but in fact 1 unit, and elevator feel control unit was in another location, and inadvertently did not get changed. Had serial number verification been required on parts changes, I feel this problem would never nave occurred.

Original NASA ASRS Text

Title: A B727-200 UNDERGOING HVY MAINT HAD A JOB CARD TO REPLACE THE FEEL COMPUTER AND ELEVATOR FEEL CTL UNIT. THE ELEVATOR FEEL CTL UNIT WAS NOT REPLACED.

Narrative: WHILE WORKING AS A MECH, FOR ABC, DOING MAINT ON DDD, I WAS ASSIGNED THE TASK OF REPLACING THE ELEVATOR FEEL COMPUTER UNIT AND ELEVATOR FEEL CTL UNIT. I WAS GIVEN DDD JOB CARD NUMBER XXXX TO CHANGE ELEVATOR FEEL CTL UNITS. UPON RECEIVING ELEVATOR FEEL COMPUTER UNIT, WE ASSUMED THE FEEL CTL UNIT WAS MOUNTED PIGGYBACK ON ELEVATOR FEEL COMPUTER UNIT. THERE WAS NO SERIAL NUMBER VERIFICATION ON ANY DDD PAPERWORK AND WE SIGNED OFF COMPLETE CARD, ASSUMING WE HAD CHANGED BOTH UNITS. WHEN DDD DID THEIR WORK PACKAGE AUDIT, THEY ASKED WHY THEY HAD RECEIVED THE SAME SERIAL NUMBER BACK FROM ELEVATOR FEEL CTL UNIT. THAT'S WHEN THEY QUESTIONED WHETHER ELEVATOR FEEL CTL UNIT HAD BEEN CHANGED. UPON FURTHER INVESTIGATION, ON OUR PART, AFTER BEING QUESTIONED ABOUT SERIAL NUMBERS BEING THE SAME, WE DETERMINED THE UNIT I CHANGED WAS NOT 2 UNITS PIGGYBACK, BUT IN FACT 1 UNIT, AND ELEVATOR FEEL CTL UNIT WAS IN ANOTHER LOCATION, AND INADVERTENTLY DID NOT GET CHANGED. HAD SERIAL NUMBER VERIFICATION BEEN REQUIRED ON PARTS CHANGES, I FEEL THIS PROB WOULD NEVER NAVE OCCURRED.

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.

A B727-200 undergoing heavy maintenance had a job card to replace the feel computer and elevator feel control unit. The elevator feel control unit was not replaced.