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A fixed wing commercial aircraft on climb after takeoff returned to the field due to the nose gear failed to retract caused by a nose gear lock pin installed by maintenance.
| Attributes | |
| ACN | 446379 |
| Time | |
| Date | 199908 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| 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 | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 446379 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : gear position indication other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : repair performance deficiency : testing performance deficiency : installation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On aug/xa/99, while performing a walkaround on the overnight service check aircraft, I noticed that the nose strut on aircraft xyz appeared lower than normal on extension. I verified this by checking the reference.X.dimension. In doing so, I decided to install the aircraft nose gear down-lock pin for an added safety precaution. After completion of strut service, I began to stow the equipment. In the process, a catering employee asked me if I could apply ground power to another aircraft parked at another gate. In turn, I completely forgot about removing the gear down-lock pin. It was not until the aircraft departed and then radioed in that he was unable to retract the aircraft nose gear. The aircraft returned to the gate. The gear pin was discovered to be installed in the nose gear, pin was then removed and stowed in aircraft flight compartment.
Original NASA ASRS Text
Title: A FIXED WING COMMERCIAL ACFT ON CLB AFTER TKOF RETURNED TO THE FIELD DUE TO THE NOSE GEAR FAILED TO RETRACT CAUSED BY A NOSE GEAR LOCK PIN INSTALLED BY MAINT.
Narrative: ON AUG/XA/99, WHILE PERFORMING A WALKAROUND ON THE OVERNIGHT SVC CHK ACFT, I NOTICED THAT THE NOSE STRUT ON ACFT XYZ APPEARED LOWER THAN NORMAL ON EXTENSION. I VERIFIED THIS BY CHKING THE REF.X.DIMENSION. IN DOING SO, I DECIDED TO INSTALL THE ACFT NOSE GEAR DOWN-LOCK PIN FOR AN ADDED SAFETY PRECAUTION. AFTER COMPLETION OF STRUT SVC, I BEGAN TO STOW THE EQUIP. IN THE PROCESS, A CATERING EMPLOYEE ASKED ME IF I COULD APPLY GND PWR TO ANOTHER ACFT PARKED AT ANOTHER GATE. IN TURN, I COMPLETELY FORGOT ABOUT REMOVING THE GEAR DOWN-LOCK PIN. IT WAS NOT UNTIL THE ACFT DEPARTED AND THEN RADIOED IN THAT HE WAS UNABLE TO RETRACT THE ACFT NOSE GEAR. THE ACFT RETURNED TO THE GATE. THE GEAR PIN WAS DISCOVERED TO BE INSTALLED IN THE NOSE GEAR, PIN WAS THEN REMOVED AND STOWED IN ACFT FLT COMPARTMENT.
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.