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|
Attributes | |
ACN | 315550 |
Time | |
Date | 199509 |
Day | Sun |
Local Time Of Day | 1201 To 1800 |
Place | |
Locale Reference | airport : phx |
State Reference | AZ |
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 | B737-300 |
Operating Under FAR Part | Part 121 |
Navigation In Use | Other Other |
Flight Phase | climbout : takeoff |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : instrument pilot : cfi pilot : atp pilot : commercial |
Experience | flight time last 90 days : 230 flight time total : 15000 flight time type : 230 |
ASRS Report | 315550 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : atp pilot : commercial |
Experience | flight time last 90 days : 210 flight time total : 10000 flight time type : 5600 |
ASRS Report | 315551 |
Events | |
Anomaly | aircraft equipment problem : less severe other anomaly other |
Independent Detector | other flight crewa |
Resolutory Action | none taken : insufficient time other |
Consequence | Other |
Supplementary | |
Primary Problem | Aircraft |
Air Traffic Incident | other |
Narrative:
Flight from phx-tus. During takeoff roll in a boeing 737-300 at phx, just prior to V1 (139 KTS), a sharp momentary yaw left occurred with a jolt. Our takeoff was continued and the 'yaw damper non-normal checklist' was complied with. Yaw damper switch was turned to off position. The 'after takeoff checklist' was then complied with as our departure continued. After leveloff at 17000 ft MSL, an evaluation of situation was discussed between cockpit crew. Then maintenance was notified and the discrepancy was entered into the logbook. Quote, 'during takeoff roll at phx just prior to V1 (139 KTS), a sharp, momentary yaw left occurred. Takeoff continued and yaw damper was turned off.' the flight landed in tus with no further occurrences.
Original NASA ASRS Text
Title: SUDDEN YAW DURING TKOF.
Narrative: FLT FROM PHX-TUS. DURING TKOF ROLL IN A BOEING 737-300 AT PHX, JUST PRIOR TO V1 (139 KTS), A SHARP MOMENTARY YAW L OCCURRED WITH A JOLT. OUR TKOF WAS CONTINUED AND THE 'YAW DAMPER NON-NORMAL CHKLIST' WAS COMPLIED WITH. YAW DAMPER SWITCH WAS TURNED TO OFF POS. THE 'AFTER TKOF CHKLIST' WAS THEN COMPLIED WITH AS OUR DEP CONTINUED. AFTER LEVELOFF AT 17000 FT MSL, AN EVALUATION OF SIT WAS DISCUSSED BTWN COCKPIT CREW. THEN MAINT WAS NOTIFIED AND THE DISCREPANCY WAS ENTERED INTO THE LOGBOOK. QUOTE, 'DURING TKOF ROLL AT PHX JUST PRIOR TO V1 (139 KTS), A SHARP, MOMENTARY YAW L OCCURRED. TKOF CONTINUED AND YAW DAMPER WAS TURNED OFF.' THE FLT LANDED IN TUS WITH NO FURTHER OCCURRENCES.
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.