Dc-10-30 center gear retract cylinder damaged in airline maintenance procedure.

Attributes
ACN	312901
Time
Date	199508
Day	Tue
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-10 30
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	ground : preflight other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	312901
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

Dc-10-30, needed a tire replaced on the center gear. Brakes were off for fueling and main wheels chocked. We were using maintenance manual 32-41-02. Could not get center gear to come up for tire change. Captain in cockpit asked if I wanted the center gear switched in the up position. I replied 'yes,' (not knowing this was a lock out switch). The gear did not move, I asked for the switch back in the normal position. Gear did not move. I requested for the gear handle placed in the down position so we could start over with this sequence. Fluid started running out of the center gear wheel well, had cockpit shut off hydraulics. The center gear retract cylinder piston was bent in the extend position. Maintenance manual 32-41-02 gives several ways to bring the center gear up. Should only be 1 method, no alternates. Captain should not have asked if we wanted the center gear up switch in the up position. A third mechanic in cockpit would have been useful. Aircraft was loaded with passenger and 1 FAA pilot check inspector in cockpit.

Original NASA ASRS Text

Title: DC-10-30 CTR GEAR RETRACT CYLINDER DAMAGED IN AIRLINE MAINT PROC.

Narrative: DC-10-30, NEEDED A TIRE REPLACED ON THE CTR GEAR. BRAKES WERE OFF FOR FUELING AND MAIN WHEELS CHOCKED. WE WERE USING MAINT MANUAL 32-41-02. COULD NOT GET CTR GEAR TO COME UP FOR TIRE CHANGE. CAPT IN COCKPIT ASKED IF I WANTED THE CTR GEAR SWITCHED IN THE UP POS. I REPLIED 'YES,' (NOT KNOWING THIS WAS A LOCK OUT SWITCH). THE GEAR DID NOT MOVE, I ASKED FOR THE SWITCH BACK IN THE NORMAL POS. GEAR DID NOT MOVE. I REQUESTED FOR THE GEAR HANDLE PLACED IN THE DOWN POS SO WE COULD START OVER WITH THIS SEQUENCE. FLUID STARTED RUNNING OUT OF THE CTR GEAR WHEEL WELL, HAD COCKPIT SHUT OFF HYDS. THE CTR GEAR RETRACT CYLINDER PISTON WAS BENT IN THE EXTEND POS. MAINT MANUAL 32-41-02 GIVES SEVERAL WAYS TO BRING THE CTR GEAR UP. SHOULD ONLY BE 1 METHOD, NO ALTERNATES. CAPT SHOULD NOT HAVE ASKED IF WE WANTED THE CTR GEAR UP SWITCH IN THE UP POS. A THIRD MECH IN COCKPIT WOULD HAVE BEEN USEFUL. ACFT WAS LOADED WITH PAX AND 1 FAA PLT CHK INSPECTOR IN COCKPIT.

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.