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A B737-300 incurred damage to the right main landing gear strut when the aircraft was jacked with the brakes off. Aircraft rolled off jack.
| Attributes | |
| ACN | 560938 |
| Time | |
| Date | 200209 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 560938 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : lighting contributing factor : schedule pressure performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : training performance deficiency : installation |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On a routine check, I had discovered that the #4 main tire on aircraft was worn. I started the process of removing the tire by properly placing the aircraft jack under the right hand gear. Before jacking the aircraft, I verified that the jack was seated properly and the nose tires were chocked. As I started to jack the aircraft, a few mins later, I heard a loud popping sound and realized the aircraft had come off the jack. Then fluid started to pour everywhere under the right gear, having then realized that I had released the brakes. The aircraft had come off the jack point and settled on the chocks.
Original NASA ASRS Text
Title: A B737-300 INCURRED DAMAGE TO THE R MAIN LNDG GEAR STRUT WHEN THE ACFT WAS JACKED WITH THE BRAKES OFF. ACFT ROLLED OFF JACK.
Narrative: ON A ROUTINE CHK, I HAD DISCOVERED THAT THE #4 MAIN TIRE ON ACFT WAS WORN. I STARTED THE PROCESS OF REMOVING THE TIRE BY PROPERLY PLACING THE ACFT JACK UNDER THE R HAND GEAR. BEFORE JACKING THE ACFT, I VERIFIED THAT THE JACK WAS SEATED PROPERLY AND THE NOSE TIRES WERE CHOCKED. AS I STARTED TO JACK THE ACFT, A FEW MINS LATER, I HEARD A LOUD POPPING SOUND AND REALIZED THE ACFT HAD COME OFF THE JACK. THEN FLUID STARTED TO POUR EVERYWHERE UNDER THE R GEAR, HAVING THEN REALIZED THAT I HAD RELEASED THE BRAKES. THE ACFT HAD COME OFF THE JACK POINT AND SETTLED ON THE CHOCKS.
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.