A B777-222 on takeoff roll rejected the takeoff due to unable to make takeoff power on #2 engine cau...

Attributes
ACN	388532
Time
Date	199712
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	388532
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	flight crew : rejected takeoff other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Had a status message for #2 engine electronic engine control. Repeat write-up. Removal of the electronic engine control went fine. While installation of the electronic engine control the temperature at ord was dropping and a B747 was being parked on the ramp next to the plane that me and another amt was working. While installing the electronic engine control, I had a plug that was hard to start. I asked the other amt if he could help. After he got it started, he went back to work on the bottom of electronic engine control. Me and him did not doublechk the lines at the bottom of electronic engine control. So he began to safety the lines which one of them was still loose. The installation of the electronic engine control was then inspected and the inspector did not notice the line loose. We then did the test of the electronic engine control which was only an idle run which showed that it was working fine. Aircraft went to the gate for the trip. During takeoff, the aircraft could not get takeoff power. So aircraft returned to the gate and that was when the amt at the gate found that the line was off, which fell off during taxi or takeoff. There was no warning that line came off. Callback conversation with reporter revealed the following information: reporter stated the sense line that was loose is at the lower side of the electronic engine control and not easy to see, but they missed it anyway. The reporter said the maintenance manual does specify only an engine run at idle power which in this case is not a valid test.

Original NASA ASRS Text

Title: A B777-222 ON TKOF ROLL REJECTED THE TKOF DUE TO UNABLE TO MAKE TKOF PWR ON #2 ENG CAUSED BY A LOOSE ENG SENSE LINE OF THE ELECTRONIC ENG CTL.

Narrative: HAD A STATUS MESSAGE FOR #2 ENG ELECTRONIC ENG CTL. REPEAT WRITE-UP. REMOVAL OF THE ELECTRONIC ENG CTL WENT FINE. WHILE INSTALLATION OF THE ELECTRONIC ENG CTL THE TEMP AT ORD WAS DROPPING AND A B747 WAS BEING PARKED ON THE RAMP NEXT TO THE PLANE THAT ME AND ANOTHER AMT WAS WORKING. WHILE INSTALLING THE ELECTRONIC ENG CTL, I HAD A PLUG THAT WAS HARD TO START. I ASKED THE OTHER AMT IF HE COULD HELP. AFTER HE GOT IT STARTED, HE WENT BACK TO WORK ON THE BOTTOM OF ELECTRONIC ENG CTL. ME AND HIM DID NOT DOUBLECHK THE LINES AT THE BOTTOM OF ELECTRONIC ENG CTL. SO HE BEGAN TO SAFETY THE LINES WHICH ONE OF THEM WAS STILL LOOSE. THE INSTALLATION OF THE ELECTRONIC ENG CTL WAS THEN INSPECTED AND THE INSPECTOR DID NOT NOTICE THE LINE LOOSE. WE THEN DID THE TEST OF THE ELECTRONIC ENG CTL WHICH WAS ONLY AN IDLE RUN WHICH SHOWED THAT IT WAS WORKING FINE. ACFT WENT TO THE GATE FOR THE TRIP. DURING TKOF, THE ACFT COULD NOT GET TKOF PWR. SO ACFT RETURNED TO THE GATE AND THAT WAS WHEN THE AMT AT THE GATE FOUND THAT THE LINE WAS OFF, WHICH FELL OFF DURING TAXI OR TKOF. THERE WAS NO WARNING THAT LINE CAME OFF. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE SENSE LINE THAT WAS LOOSE IS AT THE LOWER SIDE OF THE ELECTRONIC ENG CTL AND NOT EASY TO SEE, BUT THEY MISSED IT ANYWAY. THE RPTR SAID THE MAINT MANUAL DOES SPECIFY ONLY AN ENG RUN AT IDLE PWR WHICH IN THIS CASE IS NOT A VALID TEST.

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 B777-222 on takeoff roll rejected the takeoff due to unable to make takeoff power on #2 engine caused by a loose engine sense line of the electronic engine control.