Service difficulty report · Actuator · Doug MD11F

Difficulty date
March 28, 2007
Submitted
March 29, 2007
Operation
Air carrier
Aircraft
N607FE
Make and model
Doug MD11F
Aircraft serial
48547
Aircraft time
51,315 hours, 11,589 cycles
Part
Actuator
Part number
ACG74015001
Part serial
AA1
Condition
Failed
Location
Zone 700
Part time
18,377 hours, 4,156 cycles
Stage of operation
CL
How discovered
O
Nature of condition
S, J
Precautionary procedure
J, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFTER T/O, NOSE GEAR WOULD NOT RETRACT VERIFIED DOWN LOCKED ON PRI AND SECONDARY INDICATIONS, RECYCLED GEAR NUMEROUS TIMES IN FLIGHT. NO HELP, WRITE-UP CONTINUES ANOTHER WRI 32-30 0002077. WHILE CONFIG FOR LANDING APPROX 200 KIAS DESCENDING FROM 7000 FT W/ GEAR HANDLE UP AND NOSE GEAR UNSAFE THE NOSE GEAR RETRACTED. TAKEOFF (RETRACT) SPEED WAS APPROX 180 KIAS NOSE GEAR WOULD NOT RETRACT ON APPROACH, AT 180KTS, GEAR RETRACTED OK GEAR SLOW TO RETRACT. VISUALLY CHECKED NOSE GEAR AND COMPARTMENT AND DOORS NO EVIDENCE OF LEAK OR BROKEN PARTS FOUND RETRACTING ACTUATOR VERY WARM, SUSPECT INTERNAL ACTUATOR LEAK. REMOVED AND REPLACED NOSE GEAR ACTUATOR, REMOVED AND REPLACED NOSE GEAR UNLOCK ACTUATOR. PERFORMED

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