Air carrier mechanics told that the part they had installed in the fuel controller on a medium large...

Attributes
ACN	214456
Time
Date	199206
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	214456
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	214360
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On 6/fri/92 at xypm I and another mechanic were assigned to fuel control change on an medium large transport, #2 engine. We were told by our crew chief that the previous shift had installed the wrong fuel control (company part number -- ab) on that engine, and that we were to install the proper one (part dc) on #2 engine and take it out for trim. While I finished looking up the paperwork for the control change, the other mechanic assigned to the job called technical services to double check that we were installing the proper fuel control on this time. He came back a short time later and said that technical services had said that clearance delivery was the proper fuel control so we installed it and ran it all checked good except for approach idle on that engine. It still did not work. It was previously placarded inoperative a couple days earlier so we left it placarded and took it to the gate for its trip. A few days later we found out that the control we installed was the wrong one and that the right one was reinstalled later. Supplemental information from acn 214360. The afternoon shift crew chief said that an incorrect engine fuel control, company part number ab was installed on the #2 engine of air carrier medium large transport. A few days later it was discovered the ab control was the correct fuel control and that the mechanics and myself were misinformed to install the clearance delivery control and as I am a crew chief for air carrier it is my duty to inspect and sign for the mechanics work on a fuel control change. The correct fuel control was later reinstalled by another shift.

Original NASA ASRS Text

Title: ACR MECHS TOLD THAT THE PART THEY HAD INSTALLED IN THE FUEL CTLR ON A MLG WAS THE WRONG ONE. THEY REINSTALLED THE SUPPOSEDLY CORRECT ONE ONLY TO FIND OUT LATER THAT THE ORIGINALLY INSTALLED PART WAS THE CORRECT ONE AFTER ALL. THAT WAS LATER REINSTALLED.

Narrative: ON 6/FRI/92 AT XYPM I AND ANOTHER MECH WERE ASSIGNED TO FUEL CTL CHANGE ON AN MLG, #2 ENG. WE WERE TOLD BY OUR CREW CHIEF THAT THE PREVIOUS SHIFT HAD INSTALLED THE WRONG FUEL CTL (COMPANY PART NUMBER -- AB) ON THAT ENG, AND THAT WE WERE TO INSTALL THE PROPER ONE (PART DC) ON #2 ENG AND TAKE IT OUT FOR TRIM. WHILE I FINISHED LOOKING UP THE PAPERWORK FOR THE CTL CHANGE, THE OTHER MECH ASSIGNED TO THE JOB CALLED TECHNICAL SVCS TO DOUBLE CHK THAT WE WERE INSTALLING THE PROPER FUEL CTL ON THIS TIME. HE CAME BACK A SHORT TIME LATER AND SAID THAT TECHNICAL SVCS HAD SAID THAT CD WAS THE PROPER FUEL CTL SO WE INSTALLED IT AND RAN IT ALL CHKED GOOD EXCEPT FOR APCH IDLE ON THAT ENG. IT STILL DID NOT WORK. IT WAS PREVIOUSLY PLACARDED INOP A COUPLE DAYS EARLIER SO WE LEFT IT PLACARDED AND TOOK IT TO THE GATE FOR ITS TRIP. A FEW DAYS LATER WE FOUND OUT THAT THE CTL WE INSTALLED WAS THE WRONG ONE AND THAT THE RIGHT ONE WAS REINSTALLED LATER. SUPPLEMENTAL INFO FROM ACN 214360. THE AFTERNOON SHIFT CREW CHIEF SAID THAT AN INCORRECT ENG FUEL CTL, COMPANY PART NUMBER AB WAS INSTALLED ON THE #2 ENG OF ACR MLG. A FEW DAYS LATER IT WAS DISCOVERED THE AB CTL WAS THE CORRECT FUEL CTL AND THAT THE MECHS AND MYSELF WERE MISINFORMED TO INSTALL THE CD CTL AND AS I AM A CREW CHIEF FOR ACR IT IS MY DUTY TO INSPECT AND SIGN FOR THE MECHS WORK ON A FUEL CTL CHANGE. THE CORRECT FUEL CTL WAS LATER REINSTALLED BY ANOTHER SHIFT.

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.

Air carrier mechanics told that the part they had installed in the fuel controller on a medium large transport was the wrong one. They reinstalled the supposedly correct one only to find out later that the originally installed part was the correct one after all. That was later reinstalled.