B747-400 flight crew reported a flap drive EICAS and flap retraction problem on departure due to a b...

Narrative:

We had a normal takeoff. We were heavy. 841000 pounds. There was some vibration just around rotation; but not more that we have observed in the past. We were executing a departure. Passing 1000 feet. We attempted to raise the flaps and observed a flap drive EICAS message and noticed the outboard flaps were split and stopped near 20 deg. We notified ATC of our flight control malfunction. ATC notified us that there was tire debris and aircraft parts left on our takeoff runway. We requested a lower altitude - 10k feet. We were assigned holding at 10 miles. We contacted flight control to advise them of our situation; and ask their advice. The subject matter expert (sme) took way too long to get on the line. At least 15 mins. Collectively we made the decision to dump fuel to around 600k; allowing near 3 hours of fuel remaining; and getting down to 50k less than out max landing weight. We were aware of gear / tire issues; and requested the longest runway available. Our FMC did not allow us to input a holding pattern correctly... The depiction was nearly 70 degrees wrong.... I gave control of the aircraft to first officer and had him hold using raw data... He did a great job. I sent my international relief officer to the main deck to observe any possible flap damage. We dumped around 250k [pounds] of fuel. Our landing weight was now 600k. We put the gear down early; and fully configured around 18 miles from touchdown. We executed a stable approach; and nice smooth touchdown; stopping on the runway to have the airplane inspected. Maintenance advised us to taxi in to the ramp under our own power. We had coordinated to have a tug available; if necessary. At the ramp; we observed the retread portion of the number 8 tire missing; and damage to the panels near that gear; as well as some of the wiring conduits. My crew did a textbook job. Looking back at the event; we would not change any of our actions. We were disappointed in the time lag of getting a sme on the line. Also; the FMC not working correctly to put in the hold was distracting.

Original NASA ASRS Text

Title: B747-400 flight crew reported a FLAP DRIVE EICAS and flap retraction problem on departure due to a blown tire. They reported dumping fuel and returned to departure airport.

Narrative: We had a normal takeoff. We were heavy. 841000 LBS. There was some vibration just around rotation; but not more that we have observed in the past. We were executing a departure. Passing 1000 feet. We attempted to raise the flaps and observed a FLAP DRIVE EICAS message and noticed the outboard flaps were split and stopped near 20 deg. We notified ATC of our flight control malfunction. ATC notified us that there was tire debris and aircraft parts left on our takeoff runway. We requested a lower altitude - 10k feet. We were assigned holding at 10 miles. We contacted flight control to advise them of our situation; and ask their advice. The Subject Matter Expert (SME) took way too long to get on the line. At least 15 mins. Collectively we made the decision to dump fuel to around 600k; allowing near 3 hours of fuel remaining; and getting down to 50k less than out max landing weight. We were aware of gear / tire issues; and requested the longest runway available. Our FMC did not allow us to input a holding pattern correctly... The depiction was nearly 70 degrees wrong.... I gave control of the aircraft to First Officer and had him hold using raw data... He did a great job. I sent my IRO to the main deck to observe any possible flap damage. We dumped around 250k [LBS] of fuel. Our landing weight was now 600k. We put the gear down early; and fully configured around 18 miles from touchdown. We executed a stable approach; and nice smooth touchdown; stopping on the runway to have the airplane inspected. Maintenance advised us to taxi in to the ramp under our own power. We had coordinated to have a tug available; if necessary. At the ramp; we observed the retread portion of the number 8 tire missing; and damage to the panels near that gear; as well as some of the wiring conduits. My crew did a textbook job. Looking back at the event; we would not change any of our actions. We were disappointed in the time lag of getting a SME on the line. Also; the FMC not working correctly to put in the hold was distracting.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1370907
Time
Date	201607
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Flap/Slat Control System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 15000 Flight Crew Type 3200
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Other / Unknown

B747-400 flight crew reported a flap drive EICAS and flap retraction problem on departure due to a blown tire. They reported dumping fuel and returned to departure airport.