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A B777 aborted takeoff at 115 KTS due to primary flight display and control display unit failures. Aircraft found in-flight mode.
| Attributes | |
| ACN | 602702 |
| Time | |
| Date | 200312 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 602702 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 602704 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : primary flt display other flight crewa other flight crewb |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : scheduled maintenance performance deficiency : testing performance deficiency : repair performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Started takeoff roll on runway 36R at XA09. Our weight was 426000 pounds and the wind was at 330 degrees 28 KTS. To power with no derate and packs off was used because of cdl requirements. Speed bugs were 124, 132, 143 KTS. At approximately 115 KTS the bugs went blank on the pfd and CDU. Because of the low ground speed and much runway remaining, I aborted the takeoff. The speed brakes did not deploy and I was unable to disengage the rejected takeoff autobraking by depressing the brake pedals. I reached over and turned the autobrake selector to off. Other than this I thought the abort went smoothly. Maintenance checked the gear and found the brakes okay. They did find that the 'air ground sensors' were out of calibration, which probably caused all of the malfunctions.
Original NASA ASRS Text
Title: A B777 ABORTED TKOF AT 115 KTS DUE TO PRIMARY FLT DISPLAY AND CTL DISPLAY UNIT FAILURES. ACFT FOUND INFLT MODE.
Narrative: STARTED TKOF ROLL ON RWY 36R AT XA09. OUR WT WAS 426000 LBS AND THE WIND WAS AT 330 DEGS 28 KTS. TO PWR WITH NO DERATE AND PACKS OFF WAS USED BECAUSE OF CDL REQUIREMENTS. SPD BUGS WERE 124, 132, 143 KTS. AT APPROX 115 KTS THE BUGS WENT BLANK ON THE PFD AND CDU. BECAUSE OF THE LOW GND SPD AND MUCH RWY REMAINING, I ABORTED THE TKOF. THE SPD BRAKES DID NOT DEPLOY AND I WAS UNABLE TO DISENGAGE THE RTO AUTOBRAKING BY DEPRESSING THE BRAKE PEDALS. I REACHED OVER AND TURNED THE AUTOBRAKE SELECTOR TO OFF. OTHER THAN THIS I THOUGHT THE ABORT WENT SMOOTHLY. MAINT CHKED THE GEAR AND FOUND THE BRAKES OKAY. THEY DID FIND THAT THE 'AIR GND SENSORS' WERE OUT OF CALIBRATION, WHICH PROBABLY CAUSED ALL OF THE MALFUNCTIONS.
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.