 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
An MD80-82 at cruise diverted due to the left throttle jammed at cruise power caused by a missing bolt in the autothrottle clutch pack.
| Attributes | |
| ACN | 412231 |
| Time | |
| Date | 199808 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-82 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 412231 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
On aug/xa/98 I completed installation of aircraft xyz autothrottle clutch assembly. On aug/xe/98 the autothrottle system was put back on placard. On aug/xj/98 the l-hand throttle jammed and the diversion occurred. Callback conversation with reporter revealed the following information: the reporter stated the cause of the jammed throttle was a missing bolt in the clutch pack. The reporter said the bolt was present when the clutch pack installation was complete and inspected. The reporter stated the bolt was safety wired so sometime after the job was completed the clutch pack was again worked.
Original NASA ASRS Text
Title: AN MD80-82 AT CRUISE DIVERTED DUE TO THE L THROTTLE JAMMED AT CRUISE PWR CAUSED BY A MISSING BOLT IN THE AUTOTHROTTLE CLUTCH PACK.
Narrative: ON AUG/XA/98 I COMPLETED INSTALLATION OF ACFT XYZ AUTOTHROTTLE CLUTCH ASSEMBLY. ON AUG/XE/98 THE AUTOTHROTTLE SYS WAS PUT BACK ON PLACARD. ON AUG/XJ/98 THE L-HAND THROTTLE JAMMED AND THE DIVERSION OCCURRED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE JAMMED THROTTLE WAS A MISSING BOLT IN THE CLUTCH PACK. THE RPTR SAID THE BOLT WAS PRESENT WHEN THE CLUTCH PACK INSTALLATION WAS COMPLETE AND INSPECTED. THE RPTR STATED THE BOLT WAS SAFETY WIRED SO SOMETIME AFTER THE JOB WAS COMPLETED THE CLUTCH PACK WAS AGAIN WORKED.
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.