A B737-200 while being jacked for a brake replacement incurred damage to the left strut when the air...

Attributes
ACN	386011
Time
Date	199711
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
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	386011
Person 2
Affiliation	company : air carrier
Function	other personnel other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	other Other
Supplementary
Air Traffic Incident	other

Narrative:

While jacking up the l-hand main landing gear for #1 brake replacement, the aircraft suddenly moved forward causing the jack to slip off of the mounting point. The jack then broke off the service valve at the bottom of the strut causing the strut to collapse. Only damage was servicing valve replacement. Eddy current inspection performed and no cracks found. Replaced seals for l-hand strut tube. Aircraft was put back to service. The WX was rainy all day and that night. The lighting was bad. I lined the jack up to the mounting point and started jacking the l-hand gear up. I failed to take action to stop the removal of seat pallets off of the aircraft while jacking up the aircraft. The forklift with the slave could have bumped the aircraft at the cargo door area causing the aircraft to shift. However, the driver said he did not contact the aircraft. Our jacks are also not in the best of svcability which also could have been a contributing factor.

Original NASA ASRS Text

Title: A B737-200 WHILE BEING JACKED FOR A BRAKE REPLACEMENT INCURRED DAMAGE TO THE L STRUT WHEN THE ACFT SLIPPED OFF THE JACK.

Narrative: WHILE JACKING UP THE L-HAND MAIN LNDG GEAR FOR #1 BRAKE REPLACEMENT, THE ACFT SUDDENLY MOVED FORWARD CAUSING THE JACK TO SLIP OFF OF THE MOUNTING POINT. THE JACK THEN BROKE OFF THE SVC VALVE AT THE BOTTOM OF THE STRUT CAUSING THE STRUT TO COLLAPSE. ONLY DAMAGE WAS SVCING VALVE REPLACEMENT. EDDY CURRENT INSPECTION PERFORMED AND NO CRACKS FOUND. REPLACED SEALS FOR L-HAND STRUT TUBE. ACFT WAS PUT BACK TO SVC. THE WX WAS RAINY ALL DAY AND THAT NIGHT. THE LIGHTING WAS BAD. I LINED THE JACK UP TO THE MOUNTING POINT AND STARTED JACKING THE L-HAND GEAR UP. I FAILED TO TAKE ACTION TO STOP THE REMOVAL OF SEAT PALLETS OFF OF THE ACFT WHILE JACKING UP THE ACFT. THE FORKLIFT WITH THE SLAVE COULD HAVE BUMPED THE ACFT AT THE CARGO DOOR AREA CAUSING THE ACFT TO SHIFT. HOWEVER, THE DRIVER SAID HE DID NOT CONTACT THE ACFT. OUR JACKS ARE ALSO NOT IN THE BEST OF SVCABILITY WHICH ALSO COULD HAVE BEEN A CONTRIBUTING FACTOR.

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.

A B737-200 while being jacked for a brake replacement incurred damage to the left strut when the aircraft slipped off the jack.