 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A DC9-30 at start of descent at FL350 the right engine thrust lever was found frozen. Thrust lever control regained at 5000 ft.
| Attributes | |
| ACN | 504654 |
| Time | |
| Date | 200103 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : msp.airport |
| State Reference | MN |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Rain Ice Windshear |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time total : 12920 flight time type : 290 |
| ASRS Report | 504654 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | aircraft : equipment problem dissipated |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Weather |
| Primary Problem | Aircraft |
Narrative:
Departed cvg in rain and gusty winds, climbed to FL350. Were at altitude for 1 hour 15 mins en route to msp. Upon beginning our descent to msp, right throttle would not move. It appeared to be frozen. Asked for alternate descent off the arrival STAR. Contacted our company maintenance for suggestions, but they had none. Had an extremely low altimeter setting 28.50 -- thought it was 29.50, so upon leveloff at 11000 ft we were actually at 10100 ft. Due to problem and 1 pilot talking to company, both pilots missed altimeter setting until ATC told us that we should check our altimeter setting. Maneuvered at 5000 ft for 15 mins. We tried to unfreeze throttle. Planned to land on longest runway and the company had called out emergency equipment but we did not declare emergency. On final into msp, we were finally able to unfreeze the throttle and land normally. Maintenance found small crack in cable housing.
Original NASA ASRS Text
Title: A DC9-30 AT START OF DSCNT AT FL350 THE R ENG THRUST LEVER WAS FOUND FROZEN. THRUST LEVER CTL REGAINED AT 5000 FT.
Narrative: DEPARTED CVG IN RAIN AND GUSTY WINDS, CLBED TO FL350. WERE AT ALT FOR 1 HR 15 MINS ENRTE TO MSP. UPON BEGINNING OUR DSCNT TO MSP, R THROTTLE WOULD NOT MOVE. IT APPEARED TO BE FROZEN. ASKED FOR ALTERNATE DSCNT OFF THE ARR STAR. CONTACTED OUR COMPANY MAINT FOR SUGGESTIONS, BUT THEY HAD NONE. HAD AN EXTREMELY LOW ALTIMETER SETTING 28.50 -- THOUGHT IT WAS 29.50, SO UPON LEVELOFF AT 11000 FT WE WERE ACTUALLY AT 10100 FT. DUE TO PROB AND 1 PLT TALKING TO COMPANY, BOTH PLTS MISSED ALTIMETER SETTING UNTIL ATC TOLD US THAT WE SHOULD CHK OUR ALTIMETER SETTING. MANEUVERED AT 5000 FT FOR 15 MINS. WE TRIED TO UNFREEZE THROTTLE. PLANNED TO LAND ON LONGEST RWY AND THE COMPANY HAD CALLED OUT EMER EQUIP BUT WE DID NOT DECLARE EMER. ON FINAL INTO MSP, WE WERE FINALLY ABLE TO UNFREEZE THE THROTTLE AND LAND NORMALLY. MAINT FOUND SMALL CRACK IN CABLE HOUSING.
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.