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A B737-400 returned to the field due to unable to retract the nose landing gear caused by the nose gear lock pin installed for maintenance and not removed.
| Attributes | |
| ACN | 378530 |
| Time | |
| Date | 199708 |
| 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 | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | other personnel |
| Qualification | other other : other |
| ASRS Report | 378530 |
| Person 2 | |
| Affiliation | Other |
| Function | other personnel |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| Publication | Unspecified |
Narrative:
A nose landing gear lock pin was installed as a precaution for tire change. The task card carried only a warning to install the pin. There were no direct signoffs for installation or removal of pin of task card signoffs. Carrier's general maintenance manual calls out for a logbook entry to cover procedure for the gear pin. Mechanics were unaware of the requirement for a logbook entry pertaining to gear pin installation. In an attempt to complete all the necessary paperwork for an on-time departure, removal of the pin was inadvertently overlooked. Aircraft departed station with the pin installed and returned after gear would not retract. Upon return to gate the pin was removed and the aircraft departed station without further incident. Unfamiliarity with the paperwork, as it was contract maintenance and time constraints led to the incident.
Original NASA ASRS Text
Title: A B737-400 RETURNED TO THE FIELD DUE TO UNABLE TO RETRACT THE NOSE LNDG GEAR CAUSED BY THE NOSE GEAR LOCK PIN INSTALLED FOR MAINT AND NOT REMOVED.
Narrative: A NOSE LNDG GEAR LOCK PIN WAS INSTALLED AS A PRECAUTION FOR TIRE CHANGE. THE TASK CARD CARRIED ONLY A WARNING TO INSTALL THE PIN. THERE WERE NO DIRECT SIGNOFFS FOR INSTALLATION OR REMOVAL OF PIN OF TASK CARD SIGNOFFS. CARRIER'S GENERAL MAINT MANUAL CALLS OUT FOR A LOGBOOK ENTRY TO COVER PROC FOR THE GEAR PIN. MECHS WERE UNAWARE OF THE REQUIREMENT FOR A LOGBOOK ENTRY PERTAINING TO GEAR PIN INSTALLATION. IN AN ATTEMPT TO COMPLETE ALL THE NECESSARY PAPERWORK FOR AN ON-TIME DEP, REMOVAL OF THE PIN WAS INADVERTENTLY OVERLOOKED. ACFT DEPARTED STATION WITH THE PIN INSTALLED AND RETURNED AFTER GEAR WOULD NOT RETRACT. UPON RETURN TO GATE THE PIN WAS REMOVED AND THE ACFT DEPARTED STATION WITHOUT FURTHER INCIDENT. UNFAMILIARITY WITH THE PAPERWORK, AS IT WAS CONTRACT MAINT AND TIME CONSTRAINTS LED TO THE INCIDENT.
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.