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A DC9-32 returned to the field due to multiple system failures caused by the nose gear ground shift linkage disconnected.
| Attributes | |
| ACN | 412622 |
| Time | |
| Date | 199808 |
| Day | Sun |
| 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 | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 412622 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
A DC9-32 aircraft performed an air turnback after heavy maintenance including: full c-chk, l-hand engine change, several corrosion cards, a nose landing gear change and functional checks and a 121 hour a-chk inspection. I performed the c-chk close and find close walkaround after all routine items and nonroutine items were accounted for as being complete. I signed the airworthiness to release the aircraft to service. The cause of the air turnback was a disconnect ground shift linkage causing many system not to function properly in-flight. The final close work cards only specify doors and panels and does not call out for any linkage. It is at this time undetermined how or why the linkage was disconnected sometime after it was signed off as being done very early on in the nose landing gear change paperwork. I know for a fact that this has happened to other carriers as well as with us. A suggested solution to this potential recurrence is to include this in our own company inspection program as having this linkage as a final signoff to all of our inspections from small to major inspection procedures.
Original NASA ASRS Text
Title: A DC9-32 RETURNED TO THE FIELD DUE TO MULTIPLE SYS FAILURES CAUSED BY THE NOSE GEAR GND SHIFT LINKAGE DISCONNECTED.
Narrative: A DC9-32 ACFT PERFORMED AN AIR TURNBACK AFTER HVY MAINT INCLUDING: FULL C-CHK, L-HAND ENG CHANGE, SEVERAL CORROSION CARDS, A NOSE LNDG GEAR CHANGE AND FUNCTIONAL CHKS AND A 121 HR A-CHK INSPECTION. I PERFORMED THE C-CHK CLOSE AND FIND CLOSE WALKAROUND AFTER ALL ROUTINE ITEMS AND NONROUTINE ITEMS WERE ACCOUNTED FOR AS BEING COMPLETE. I SIGNED THE AIRWORTHINESS TO RELEASE THE ACFT TO SVC. THE CAUSE OF THE AIR TURNBACK WAS A DISCONNECT GND SHIFT LINKAGE CAUSING MANY SYS NOT TO FUNCTION PROPERLY INFLT. THE FINAL CLOSE WORK CARDS ONLY SPECIFY DOORS AND PANELS AND DOES NOT CALL OUT FOR ANY LINKAGE. IT IS AT THIS TIME UNDETERMINED HOW OR WHY THE LINKAGE WAS DISCONNECTED SOMETIME AFTER IT WAS SIGNED OFF AS BEING DONE VERY EARLY ON IN THE NOSE LNDG GEAR CHANGE PAPERWORK. I KNOW FOR A FACT THAT THIS HAS HAPPENED TO OTHER CARRIERS AS WELL AS WITH US. A SUGGESTED SOLUTION TO THIS POTENTIAL RECURRENCE IS TO INCLUDE THIS IN OUR OWN COMPANY INSPECTION PROGRAM AS HAVING THIS LINKAGE AS A FINAL SIGNOFF TO ALL OF OUR INSPECTIONS FROM SMALL TO MAJOR INSPECTION PROCS.
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.