Narrative:

All phases of flight were normal until lowering the landing gear at lax. The indications showed wing gear only, no body gear or nose gear. A fly-by past the tower confirmed this was indeed the case. We then proceeded to hold west of lax to work on the problem. Normal and alternate procedures were tried at least twice. I was flying the aircraft and first officer was in contact with our systems personnel and engineering people. The two relief pilots were assisting first officer in implementing ideas from engineering and coordinating efforts with the cabin crew in preparation for evacuation. All procedures and suggestions from engineering, including a touch and go landing to try to jar the gear loose, failed. We then told the cabin attendants to prepare for an abnormal landing and plan to evacuate the passengers. The tower was told that we wanted the equipment standing by and that we planned to evacuate the passengers. The landing was made on the wing gear and the nose lowered onto the nose gear doors at a slow speed. The passengers were then evacuated. Supplemental information from acn 156158. Talked to maintenance, pulled cbs, turned off all #1 system hydraulic pressure shutting off wing hydraulic power and touch and go to shake it loose as well as 'G' maneuvers. The aircraft's nose was lowered to runway at about 70 KTS adn stopped with 700' left. The evacuation was performed. The nose was on the ground. Callback conversation with reporter revealed the following information. A hydraulic control actuator rod came loose because it had not been torqued properly by the mfr. The rod left the hydraulic pressure ported to the up side of the gear cycle so free fall was not possible and there was no way to bleed off the pressure. Passenger injuries were very minor during evacuation. The aircraft was back in service in 4 days with the longest delay was getting the nose gear doors from the subcontractor. Classified as an incident by the FAA and no FAA/flight crew review to date.

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Original NASA ASRS Text

Title: ACR WDB LANDED WITH NOSE GEAR AND BODY GEAR IN THE RETRACTED POSITION.

Narrative: ALL PHASES OF FLT WERE NORMAL UNTIL LOWERING THE LNDG GEAR AT LAX. THE INDICATIONS SHOWED WING GEAR ONLY, NO BODY GEAR OR NOSE GEAR. A FLY-BY PAST THE TWR CONFIRMED THIS WAS INDEED THE CASE. WE THEN PROCEEDED TO HOLD W OF LAX TO WORK ON THE PROB. NORMAL AND ALTERNATE PROCS WERE TRIED AT LEAST TWICE. I WAS FLYING THE ACFT AND F/O WAS IN CONTACT WITH OUR SYSTEMS PERSONNEL AND ENGINEERING PEOPLE. THE TWO RELIEF PLTS WERE ASSISTING F/O IN IMPLEMENTING IDEAS FROM ENGINEERING AND COORDINATING EFFORTS WITH THE CABIN CREW IN PREPARATION FOR EVACUATION. ALL PROCS AND SUGGESTIONS FROM ENGINEERING, INCLUDING A TOUCH AND GO LNDG TO TRY TO JAR THE GEAR LOOSE, FAILED. WE THEN TOLD THE CABIN ATTENDANTS TO PREPARE FOR AN ABNORMAL LNDG AND PLAN TO EVACUATE THE PAXS. THE TWR WAS TOLD THAT WE WANTED THE EQUIP STANDING BY AND THAT WE PLANNED TO EVACUATE THE PAXS. THE LNDG WAS MADE ON THE WING GEAR AND THE NOSE LOWERED ONTO THE NOSE GEAR DOORS AT A SLOW SPD. THE PAXS WERE THEN EVACUATED. SUPPLEMENTAL INFO FROM ACN 156158. TALKED TO MAINT, PULLED CBS, TURNED OFF ALL #1 SYS HYD PRESSURE SHUTTING OFF WING HYD PWR AND TOUCH AND GO TO SHAKE IT LOOSE AS WELL AS 'G' MANEUVERS. THE ACFT'S NOSE WAS LOWERED TO RWY AT ABOUT 70 KTS ADN STOPPED WITH 700' LEFT. THE EVACUATION WAS PERFORMED. THE NOSE WAS ON THE GND. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. A HYD CTL ACTUATOR ROD CAME LOOSE BECAUSE IT HAD NOT BEEN TORQUED PROPERLY BY THE MFR. THE ROD LEFT THE HYD PRESSURE PORTED TO THE UP SIDE OF THE GEAR CYCLE SO FREE FALL WAS NOT POSSIBLE AND THERE WAS NO WAY TO BLEED OFF THE PRESSURE. PAX INJURIES WERE VERY MINOR DURING EVACUATION. THE ACFT WAS BACK IN SVC IN 4 DAYS WITH THE LONGEST DELAY WAS GETTING THE NOSE GEAR DOORS FROM THE SUBCONTRACTOR. CLASSIFIED AS AN INCIDENT BY THE FAA AND NO FAA/FLT CREW REVIEW TO DATE.

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.