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The flight crew of a B777 declared an emergency and returned to their departure airport following receipt of numerous and inappropriate warning and caution lights late in the high speed regime of the takeoff roll.
| Attributes | |
| ACN | 1092356 |
| Time | |
| Date | 201306 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Electrical Power |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 240 Flight Crew Total 17000 Flight Crew Type 5000 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 11000 Flight Crew Type 3900 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
In the high speed regime on takeoff roll we received an inhibited master warning. Right after liftoff after the aircraft entered the 'air mode' numerous cockpit lights illuminated (15+) on both the overhead panels and the pedestal. All aircraft systems continued to operate normally but the warning; caution and inoperative lights stayed illuminated. We checked the electrical synoptic and it showed normal ops for the electrical system. We declared an emergency and landed on the runway of takeoff with no irregularities. Upon touchdown all of the erroneous indicating lights went out. Maintenance suspected an elms [electrical load management system] fault.
Original NASA ASRS Text
Title: The flight crew of a B777 declared an emergency and returned to their departure airport following receipt of numerous and inappropriate warning and caution lights late in the high speed regime of the takeoff roll.
Narrative: In the high speed regime on takeoff roll we received an inhibited Master Warning. Right after liftoff after the aircraft entered the 'Air Mode' numerous cockpit lights illuminated (15+) on both the overhead panels and the pedestal. All aircraft systems continued to operate normally but the warning; caution and inoperative lights stayed illuminated. We checked the Electrical Synoptic and it showed normal ops for the electrical system. We declared an emergency and landed on the runway of takeoff with no irregularities. Upon touchdown all of the erroneous indicating lights went out. Maintenance suspected an ELMS [Electrical Load Management System] Fault.
Data retrieved from NASA's ASRS site as of July 2013 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.