Flight crew of B747-100 on takeoff and initial climb finds loss of aileron control on the first offi...

Attributes
ACN	413114
Time
Date	199808
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : jed
State Reference	FO
Altitude	agl bound lower : 0 agl bound upper : 400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : jed
Operator	common carrier : air carrier
Make Model Name	B747-100
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 13000 flight time type : 2800
ASRS Report	413114
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Normal departure for an international trip. First officer to perform the takeoff. All flight control checks normal. During takeoff, captain noticed rotation by first officer stopped at 10 degrees nose up. Called to continue to rotate to 15 degrees target pitch altitude. Previous leg by first officer was observed to perform 2 stage rotation. First officer continued to perform smooth 2 degree per second rotation to 15 degrees. At 400 ft, commenced left turn on course. First officer responded unable to move ailerons. Captain assumed control and continued departure. During climb, noted 1 1/2 inches lost motion on first officer controls by captain and flight engineer (first officer controls observed). Captain's controls operated normally with light pressure. After flap retraction, same problem with jammed/restr first officer controls. Performed abnormal/emergency checklist per company procedures. Returned to jeddah base, dumped fuel and normal landing rather than 5 hour trip into airport in low visibility conditions (monsoon). Mechanics found broken spring in lost motion control box. During dump #3 main tank inboard and outboard jettison pumps failed. Performed checklist procedures to continue dump and maintain lateral fuel balance. What more could go wrong? We had excellent CRM and handled problem well with a return to base and nothing overlooked. Today's flight technicians are not working many system or properly inspecting them. The B747- 100 needs lots of attention.

Original NASA ASRS Text

Title: FLC OF B747-100 ON TKOF AND INITIAL CLB FINDS LOSS OF AILERON CTL ON THE FO'S CTLS. FUEL IS DUMPED AND A RETURN LAND EXECUTED. JETTISON PUMPS FAILED WHEN DUMPING FUEL.

Narrative: NORMAL DEP FOR AN INTL TRIP. FO TO PERFORM THE TKOF. ALL FLT CTL CHKS NORMAL. DURING TKOF, CAPT NOTICED ROTATION BY FO STOPPED AT 10 DEGS NOSE UP. CALLED TO CONTINUE TO ROTATE TO 15 DEGS TARGET PITCH ALT. PREVIOUS LEG BY FO WAS OBSERVED TO PERFORM 2 STAGE ROTATION. FO CONTINUED TO PERFORM SMOOTH 2 DEG PER SECOND ROTATION TO 15 DEGS. AT 400 FT, COMMENCED L TURN ON COURSE. FO RESPONDED UNABLE TO MOVE AILERONS. CAPT ASSUMED CTL AND CONTINUED DEP. DURING CLB, NOTED 1 1/2 INCHES LOST MOTION ON FO CTLS BY CAPT AND FE (FO CTLS OBSERVED). CAPT'S CTLS OPERATED NORMALLY WITH LIGHT PRESSURE. AFTER FLAP RETRACTION, SAME PROB WITH JAMMED/RESTR FO CTLS. PERFORMED ABNORMAL/EMER CHKLIST PER COMPANY PROCS. RETURNED TO JEDDAH BASE, DUMPED FUEL AND NORMAL LNDG RATHER THAN 5 HR TRIP INTO ARPT IN LOW VISIBILITY CONDITIONS (MONSOON). MECHS FOUND BROKEN SPRING IN LOST MOTION CTL BOX. DURING DUMP #3 MAIN TANK INBOARD AND OUTBOARD JETTISON PUMPS FAILED. PERFORMED CHKLIST PROCS TO CONTINUE DUMP AND MAINTAIN LATERAL FUEL BAL. WHAT MORE COULD GO WRONG? WE HAD EXCELLENT CRM AND HANDLED PROB WELL WITH A RETURN TO BASE AND NOTHING OVERLOOKED. TODAY'S FLT TECHNICIANS ARE NOT WORKING MANY SYS OR PROPERLY INSPECTING THEM. THE B747- 100 NEEDS LOTS OF ATTN.

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.

Flight crew of B747-100 on takeoff and initial climb finds loss of aileron control on the first officer's controls. Fuel is dumped and a return land executed. Jettison pumps failed when dumping fuel.