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A B737-700 executes a flyby past the tower for nose gear extension check, but does not advise company maintenance and lands with no logbook report.
| Attributes | |
| ACN | 499740 |
| Time | |
| Date | 200101 |
| Day | Sat |
| 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 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 499740 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 499739 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : company policies non adherence : published procedure non adherence : far |
| Resolutory Action | aircraft : equipment problem dissipated |
| Consequence | faa : investigated other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Responded to verbal information regarding aircraft condition. Callback conversation with reporter revealed the following information: the reporter stated he was on duty as a company tower maintenance controller and no one in company maintenance was advised of the nose landing gear problem until the aircraft landed and parked. The reporter said no write-up was made in the logbook on the failure of the nose gear to extend on the first attemp. The reporter stated the new series of B737-600, 700, and 800 have a hydraulic fuse on the extend line which when cold soaked locks up and requires recycling the landing gear which allows the fuse to clear. The reporter said a service bulletin has been issued by baco describing this anomaly and the flight crew possibly being aware of this did not consider it as a maintenance problem.
Original NASA ASRS Text
Title: A B737-700 EXECUTES A FLYBY PAST THE TOWER FOR NOSE GEAR EXTENSION CHECK, BUT DOES NOT ADVISE COMPANY MAINTENANCE AND LANDS WITH NO LOGBOOK REPORT.
Narrative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
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.