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DC9-15 crew was unable to raise the landing gear. They also were unable to get the aircraft ground shift from the ground to the flight mode.
| Attributes | |
| ACN | 516643 |
| Time | |
| Date | 200107 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Experience | maintenance technician : 24 |
| ASRS Report | 516643 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : company policies non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance controller : provided flight assist flight crew : diverted to another airport none taken : detected after the fact other |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : testing performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Following nose landing gear time change, aircraft took off and crew was unable to retract landing gear, and had problems with pressurization. Got gear to retract after consulting maintenance control and pushing gear handle release button out of uplatch detent position. Gear then cycled normally. Aircraft returned to field of departure (milwaukee). Gear down. Nose gear was just changed, and retraction tests and light indication checks for gear position were performed, with satisfactory results. Aircraft was released for service prior to air turn back as described above. Upon investigating the matter with aircraft on jacks, found nose gear ground sensing cables and anti-retract cable out of proper adjusting (rig) in terms of tension, per maintenance manual procedures. These cables directly affected by and actuated by nose gear strut extension and compression. Pressurization of cabin and retract problems in flight resulted. After adjusting cable tensions, retraction tests performed and gear handle travel was all normal, as were the lights. Aircraft released for service, with no further problems. The root cause was improper rig of ground sensing cables.
Original NASA ASRS Text
Title: DC9-15 CREW WAS UNABLE TO RAISE THE LNDG GEAR. THEY ALSO WERE UNABLE TO GET THE ACFT GND SHIFT FROM THE GND TO THE FLT MODE.
Narrative: FOLLOWING NOSE LNDG GEAR TIME CHANGE, ACFT TOOK OFF AND CREW WAS UNABLE TO RETRACT LNDG GEAR, AND HAD PROBS WITH PRESSURIZATION. GOT GEAR TO RETRACT AFTER CONSULTING MAINT CTL AND PUSHING GEAR HANDLE RELEASE BUTTON OUT OF UPLATCH DETENT POS. GEAR THEN CYCLED NORMALLY. ACFT RETURNED TO FIELD OF DEP (MILWAUKEE). GEAR DOWN. NOSE GEAR WAS JUST CHANGED, AND RETRACTION TESTS AND LIGHT INDICATION CHKS FOR GEAR POS WERE PERFORMED, WITH SATISFACTORY RESULTS. ACFT WAS RELEASED FOR SVC PRIOR TO AIR TURN BACK AS DESCRIBED ABOVE. UPON INVESTIGATING THE MATTER WITH ACFT ON JACKS, FOUND NOSE GEAR GND SENSING CABLES AND ANTI-RETRACT CABLE OUT OF PROPER ADJUSTING (RIG) IN TERMS OF TENSION, PER MAINT MANUAL PROCS. THESE CABLES DIRECTLY AFFECTED BY AND ACTUATED BY NOSE GEAR STRUT EXTENSION AND COMPRESSION. PRESSURIZATION OF CABIN AND RETRACT PROBS IN FLT RESULTED. AFTER ADJUSTING CABLE TENSIONS, RETRACTION TESTS PERFORMED AND GEAR HANDLE TRAVEL WAS ALL NORMAL, AS WERE THE LIGHTS. ACFT RELEASED FOR SVC, WITH NO FURTHER PROBS. THE ROOT CAUSE WAS IMPROPER RIG OF GND SENSING CABLES.
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.