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A DC9-30 at leveloff at cruise FL250 declared an emergency and diverted due to kicking and sluggish rudder control.
| Attributes | |
| ACN | 416381 |
| Time | |
| Date | 199810 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ood |
| State Reference | NJ |
| Altitude | msl bound lower : 24500 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 10000 flight time type : 7500 |
| ASRS Report | 416381 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
The DC9 we were flying experienced a rudder control problem as we were leveling off at our cruise altitude of FL250. In the course of trying to regain control of aircraft, we descended approximately 500 ft to FL245 while troubleshooting aircraft system and complying with appropriate emergency checklists. We subsequently elected to declare an emergency and land in phl. Uneventful approach and landing. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was a DC9-30 and the corrective action was replacement of the rudder hydraulic power package. The reporter said the yaw damper was first turned off but did not correct the rudder problem. The reporter said the reason for the report was to explain the altitude deviation during the event.
Original NASA ASRS Text
Title: A DC9-30 AT LEVELOFF AT CRUISE FL250 DECLARED AN EMER AND DIVERTED DUE TO KICKING AND SLUGGISH RUDDER CTL.
Narrative: THE DC9 WE WERE FLYING EXPERIENCED A RUDDER CTL PROB AS WE WERE LEVELING OFF AT OUR CRUISE ALT OF FL250. IN THE COURSE OF TRYING TO REGAIN CTL OF ACFT, WE DSNDED APPROX 500 FT TO FL245 WHILE TROUBLESHOOTING ACFT SYS AND COMPLYING WITH APPROPRIATE EMER CHKLISTS. WE SUBSEQUENTLY ELECTED TO DECLARE AN EMER AND LAND IN PHL. UNEVENTFUL APCH AND LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS A DC9-30 AND THE CORRECTIVE ACTION WAS REPLACEMENT OF THE RUDDER HYD PWR PACKAGE. THE RPTR SAID THE YAW DAMPER WAS FIRST TURNED OFF BUT DID NOT CORRECT THE RUDDER PROB. THE RPTR SAID THE REASON FOR THE RPT WAS TO EXPLAIN THE ALTDEV DURING THE EVENT.
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.