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A DHC8-100 was grounded after 4 reports of nose gear door opening in-flight and 4 maintenance repairs. Chronic item fixed when alternate gear extension cable found misrouted.
| Attributes | |
| ACN | 467531 |
| Time | |
| Date | 200003 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : airframe technician : inspection authority technician : powerplant |
| ASRS Report | 467531 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : landing gear door warning |
| Resolutory Action | flight crew : landed as precaution |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : repair performance deficiency : testing performance deficiency : installation performance deficiency : inspection performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft was sent to maintenance hangar for a forward gear door opening in-flight (3RD occurrence). It was determined to change forward gear door actuator. Actuator removed and replaced -- operations of gear system satisfactory. Aircraft flew 1 day. Problem recurred. Aircraft sent to different maintenance base. An alternate gear door release cable was found misrouted. Company said this problem should have been found at actuator remove and replacement. The location of the misrouting was obscured due to engine jet pipe. The maintenance performed was completed by an experienced mechanic. I also have 2 yrs as an inspector.
Original NASA ASRS Text
Title: A DHC8-100 WAS GNDED AFTER 4 RPTS OF NOSE GEAR DOOR OPENING INFLT AND 4 MAINT REPAIRS. CHRONIC ITEM FIXED WHEN ALTERNATE GEAR EXTENSION CABLE FOUND MISROUTED.
Narrative: ACFT WAS SENT TO MAINT HANGAR FOR A FORWARD GEAR DOOR OPENING INFLT (3RD OCCURRENCE). IT WAS DETERMINED TO CHANGE FORWARD GEAR DOOR ACTUATOR. ACTUATOR REMOVED AND REPLACED -- OPS OF GEAR SYS SATISFACTORY. ACFT FLEW 1 DAY. PROB RECURRED. ACFT SENT TO DIFFERENT MAINT BASE. AN ALTERNATE GEAR DOOR RELEASE CABLE WAS FOUND MISROUTED. COMPANY SAID THIS PROB SHOULD HAVE BEEN FOUND AT ACTUATOR REMOVE AND REPLACEMENT. THE LOCATION OF THE MISROUTING WAS OBSCURED DUE TO ENG JET PIPE. THE MAINT PERFORMED WAS COMPLETED BY AN EXPERIENCED MECH. I ALSO HAVE 2 YRS AS AN INSPECTOR.
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.