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A commuter flight crew aborted takeoff after noting power fluctuations during the takeoff roll. The bleeds had been left on, so the crew then completed the checklist item and departed without a new release.
| Attributes | |
| ACN | 339828 |
| Time | |
| Date | 199606 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lft |
| State Reference | LA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 23000 flight time type : 240 |
| ASRS Report | 339828 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : private pilot : commercial pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 59 flight time total : 1404 flight time type : 57 |
| ASRS Report | 339692 |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure non adherence other other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Lft tower gave us position and hold runway 11. The before takeoff checklist was requested and supposedly completed. The first officer, without prebriefing, chose to leave the engine bleeds on to provide cooling while holding in position. Due to the length of time on the runway, holding, he forgot to turn the bleeds off. On the takeoff roll, the engine parameters were erratic, and I chose to abort. We taxied clear and completed the checklist. Then we requested taxi to another runway. I was under the impression that the dispatch release was still good, but due to abort procedures it was not. The other discrepancy was failure to complete the checklist. Both captain and first officer are dequalified and will receive ground school. Supplemental information from acn 339692: we were cleared for takeoff and given an assigned heading and a new assigned altitude. I then repeated the clearance and scrolled in the new altitude in the afcs. Being distracted by the new altitude, I neglected to turn off the bleeds for takeoff. The captain aborted the takeoff at about 90 KTS. To make sure this doesn't happen again, when initiating the before takeoff checklist, I will fully complete it instead of 'holding on the bleeds.' I've also reviewed the company flight operations manual and have become more familiar with the policies and procedures regarding abnormal procedures.
Original NASA ASRS Text
Title: A COMMUTER FLC ABORTED TKOF AFTER NOTING PWR FLUCTUATIONS DURING THE TKOF ROLL. THE BLEEDS HAD BEEN LEFT ON, SO THE CREW THEN COMPLETED THE CHKLIST ITEM AND DEPARTED WITHOUT A NEW RELEASE.
Narrative: LFT TWR GAVE US POS AND HOLD RWY 11. THE BEFORE TKOF CHKLIST WAS REQUESTED AND SUPPOSEDLY COMPLETED. THE FO, WITHOUT PREBRIEFING, CHOSE TO LEAVE THE ENG BLEEDS ON TO PROVIDE COOLING WHILE HOLDING IN POS. DUE TO THE LENGTH OF TIME ON THE RWY, HOLDING, HE FORGOT TO TURN THE BLEEDS OFF. ON THE TKOF ROLL, THE ENG PARAMETERS WERE ERRATIC, AND I CHOSE TO ABORT. WE TAXIED CLR AND COMPLETED THE CHKLIST. THEN WE REQUESTED TAXI TO ANOTHER RWY. I WAS UNDER THE IMPRESSION THAT THE DISPATCH RELEASE WAS STILL GOOD, BUT DUE TO ABORT PROCS IT WAS NOT. THE OTHER DISCREPANCY WAS FAILURE TO COMPLETE THE CHKLIST. BOTH CAPT AND FO ARE DEQUALIFIED AND WILL RECEIVE GND SCHOOL. SUPPLEMENTAL INFO FROM ACN 339692: WE WERE CLRED FOR TKOF AND GIVEN AN ASSIGNED HDG AND A NEW ASSIGNED ALT. I THEN REPEATED THE CLRNC AND SCROLLED IN THE NEW ALT IN THE AFCS. BEING DISTRACTED BY THE NEW ALT, I NEGLECTED TO TURN OFF THE BLEEDS FOR TKOF. THE CAPT ABORTED THE TKOF AT ABOUT 90 KTS. TO MAKE SURE THIS DOESN'T HAPPEN AGAIN, WHEN INITIATING THE BEFORE TKOF CHKLIST, I WILL FULLY COMPLETE IT INSTEAD OF 'HOLDING ON THE BLEEDS.' I'VE ALSO REVIEWED THE COMPANY FLT OPS MANUAL AND HAVE BECOME MORE FAMILIAR WITH THE POLICIES AND PROCS REGARDING ABNORMAL PROCS.
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.