 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of medium large transport air carrier aircraft overshot speed restriction during intermittent climb level off due to a malfunction of the thrust rating indicator for the automatic throttles.
| Attributes | |
| ACN | 246853 |
| Time | |
| Date | 199307 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 2000 |
| ASRS Report | 246853 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 150 |
| ASRS Report | 247603 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departed runway 32L at ord, during clean aircraft thrust rating indicator (tri) did not take the climb power command (we push 'cl' button on tri). This left the throttles in clamp, so during leveloff we noticed airspeed climbing. Turned off automatic throttles and reduced power. Speed did not exceed 280 KTS (and only momentarily) maintained 250 KTS until out of 10000 ft during climb. Flight uneventful. In future, both pilots should confirm thrust rating indicator in 'climb mode.'
Original NASA ASRS Text
Title: FLC OF MLG ACR ACFT OVERSHOT SPD RESTRICTION DURING INTERMITTENT CLB LEVEL OFF DUE TO A MALFUNCTION OF THE THRUST RATING INDICATOR FOR THE AUTO THROTTLES.
Narrative: DEPARTED RWY 32L AT ORD, DURING CLEAN ACFT THRUST RATING INDICATOR (TRI) DID NOT TAKE THE CLB PWR COMMAND (WE PUSH 'CL' BUTTON ON TRI). THIS LEFT THE THROTTLES IN CLAMP, SO DURING LEVELOFF WE NOTICED AIRSPD CLBING. TURNED OFF AUTO THROTTLES AND REDUCED PWR. SPD DID NOT EXCEED 280 KTS (AND ONLY MOMENTARILY) MAINTAINED 250 KTS UNTIL OUT OF 10000 FT DURING CLB. FLT UNEVENTFUL. IN FUTURE, BOTH PLTS SHOULD CONFIRM THRUST RATING INDICATOR IN 'CLB MODE.'
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.