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A B777 first officer noted discrepancies between the electronic checklist (ecl) and two aircraft flight manual charts regarding rejected takeoff brake cooling times.
| Attributes | |
| ACN | 981460 |
| Time | |
| Date | 201111 |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Checklists |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Experience | Flight Crew Last 90 Days 95 Flight Crew Total 10700 Flight Crew Type 2300 |
| Events | |
| Anomaly | No Specific Anomaly Occurred All Types |
Narrative:
While reviewing the electronic checklist (ecl) in flight; a discrepancy was noted between the ecl and the B777 flight manual (FM) concerning brake temperatures; specifically; the non-normal menu checklists for the rejected takeoff checklist. On page 6 of the rejected takeoff ecl; there is a table with brake temperatures and corresponding cooling times. These cooling times do not agree with the same table located in the flight manual rejected takeoff checklist. In the ecl; times are graduated in 10 minute intervals from 10-70 minutes for temperatures between 2.5 and 5.0 [degrees]. The corresponding times in the FM are all 10 minutes; regardless of temperature; an obvious error. I neglected to check the annunciated brake temperature checklist in the ecl at the time; however I noted later that the corresponding FM checklist utilizes what seems to be the same erroneous brake temp/cooling time table as the FM rejected takeoff checklist. Both of these FM and ecl checklists refer the user to the performance chapter if the btms is inoperative. However; the brake cooling time table contains yet another table with both temperature values and cooling times that are different from both the ecl and the two FM non-normal checklists.
Original NASA ASRS Text
Title: A B777 First Officer noted discrepancies between the electronic checklist (ECL) and two aircraft flight manual charts regarding rejected takeoff brake cooling times.
Narrative: While reviewing the electronic checklist (ECL) in flight; a discrepancy was noted between the ECL and the B777 flight manual (FM) concerning brake temperatures; specifically; the non-normal menu checklists for the Rejected Takeoff checklist. On page 6 of the Rejected Takeoff ECL; there is a table with brake temperatures and corresponding cooling times. These cooling times do not agree with the same table located in the flight manual Rejected Takeoff checklist. In the ECL; times are graduated in 10 minute intervals from 10-70 minutes for temperatures between 2.5 and 5.0 [degrees]. The corresponding times in the FM are all 10 minutes; regardless of temperature; an obvious error. I neglected to check the Annunciated Brake Temperature checklist in the ECL at the time; however I noted later that the corresponding FM checklist utilizes what seems to be the same erroneous brake temp/cooling time table as the FM Rejected Takeoff checklist. Both of these FM and ECL checklists refer the user to the performance chapter if the BTMS is inoperative. However; the brake cooling time table contains yet another table with both temperature values and cooling times that are different from both the ECL and the two FM non-normal checklists.
Data retrieved from NASA's ASRS site as of April 2012 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.