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A B757-200 on takeoff roll rejected the takeoff at 20 KTS due to left and right engine bleed valve warning. Caused by isolation valve not closed.
| Attributes | |
| ACN | 493910 |
| Time | |
| Date | 200012 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sju.airport |
| State Reference | PR |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sju.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | ground : takeoff roll |
| Route In Use | departure : other published ifr departure |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 493910 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| ASRS Report | 493908 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : #1 + #2 engine bleed warning other flight crewa other other : 2 |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
As power was being applied for takeoff, the left bleed light on the overhead panel accompanied by an EICAS message came on for just a second and went out. After takeoff power was completely applied and speed was maybe 20 KTS, the right bleed light and accompanying EICAS message illuminated and then went out. I elected to discontinue the takeoff roll at that point and cleared the runway to evaluate the problem. Once we cleared the runway the first officer noted that we had not closed the isolation valve during the after start checklist, which undoubtedly caused the bleed anomalies. The isolation valve was closed and the system operated normally throughout. In retrospect, I do not believe that I have paid close enough attention to making sure the isolation valve has been closed after engine start.
Original NASA ASRS Text
Title: A B757-200 ON TKOF ROLL REJECTED THE TKOF AT 20 KTS DUE TO L AND R ENG BLEED VALVE WARNING. CAUSED BY ISOLATION VALVE NOT CLOSED.
Narrative: AS PWR WAS BEING APPLIED FOR TKOF, THE L BLEED LIGHT ON THE OVERHEAD PANEL ACCOMPANIED BY AN EICAS MESSAGE CAME ON FOR JUST A SECOND AND WENT OUT. AFTER TKOF PWR WAS COMPLETELY APPLIED AND SPD WAS MAYBE 20 KTS, THE R BLEED LIGHT AND ACCOMPANYING EICAS MESSAGE ILLUMINATED AND THEN WENT OUT. I ELECTED TO DISCONTINUE THE TKOF ROLL AT THAT POINT AND CLRED THE RWY TO EVALUATE THE PROB. ONCE WE CLRED THE RWY THE FO NOTED THAT WE HAD NOT CLOSED THE ISOLATION VALVE DURING THE AFTER START CHKLIST, WHICH UNDOUBTEDLY CAUSED THE BLEED ANOMALIES. THE ISOLATION VALVE WAS CLOSED AND THE SYS OPERATED NORMALLY THROUGHOUT. IN RETROSPECT, I DO NOT BELIEVE THAT I HAVE PAID CLOSE ENOUGH ATTN TO MAKING SURE THE ISOLATION VALVE HAS BEEN CLOSED AFTER ENG START.
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.