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An airbus 320 returned to the field a second time with a repeat report of unable to retract the landing gear caused by a nose landing gear needing proper shock strut service.
| Attributes | |
| ACN | 409249 |
| Time | |
| Date | 199807 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| 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 | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other oversight : supervisor |
| Qualification | other other : other |
| ASRS Report | 409249 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Air carrier aircraft xyz departed and crew was unable to retract landing gear because of landing gear shock absorber fault on ECAM reported by #1 logic. Returned to field where the nose gear strut sensor target was found to be loose causing target to sense strut not extended for retract to wheel well. Target was secured by contract mechanics under my direction as air carrier maintenance controller. Flight departed and later returned to field with same fault. Callback conversation with reporter revealed the following information: the reporter stated that when the aircraft returned a second time the contract mechanics were instructed to check the nose gear strut pressure and service the strut with oil and nitrogen per the maintenance manual. The reporter said the airbus 320 nose strut has a recurring problem of not retracting if the shock strut pressure is lower than normal. The reporter stated the strut must be fully extended to engage the ctring cams to center the nosewheels allowing gear retraction as the wheels will not fit in the gear well in any confign but centered.
Original NASA ASRS Text
Title: AN AIRBUS 320 RETURNED TO THE FIELD A SECOND TIME WITH A REPEAT RPT OF UNABLE TO RETRACT THE LNDG GEAR CAUSED BY A NOSE LNDG GEAR NEEDING PROPER SHOCK STRUT SVC.
Narrative: ACR ACFT XYZ DEPARTED AND CREW WAS UNABLE TO RETRACT LNDG GEAR BECAUSE OF LNDG GEAR SHOCK ABSORBER FAULT ON ECAM RPTED BY #1 LOGIC. RETURNED TO FIELD WHERE THE NOSE GEAR STRUT SENSOR TARGET WAS FOUND TO BE LOOSE CAUSING TARGET TO SENSE STRUT NOT EXTENDED FOR RETRACT TO WHEEL WELL. TARGET WAS SECURED BY CONTRACT MECHS UNDER MY DIRECTION AS ACR MAINT CTLR. FLT DEPARTED AND LATER RETURNED TO FIELD WITH SAME FAULT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT WHEN THE ACFT RETURNED A SECOND TIME THE CONTRACT MECHS WERE INSTRUCTED TO CHK THE NOSE GEAR STRUT PRESSURE AND SVC THE STRUT WITH OIL AND NITROGEN PER THE MAINT MANUAL. THE RPTR SAID THE AIRBUS 320 NOSE STRUT HAS A RECURRING PROB OF NOT RETRACTING IF THE SHOCK STRUT PRESSURE IS LOWER THAN NORMAL. THE RPTR STATED THE STRUT MUST BE FULLY EXTENDED TO ENGAGE THE CTRING CAMS TO CTR THE NOSEWHEELS ALLOWING GEAR RETRACTION AS THE WHEELS WILL NOT FIT IN THE GEAR WELL IN ANY CONFIGN BUT CTRED.
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.