Service difficulty report · Actuator · Doug MD11F

Difficulty date
September 5, 2008
Submitted
September 10, 2008
Operation
Air carrier
Aircraft
N586FE
Make and model
Doug MD11F
Aircraft serial
48487
Aircraft time
58,368 hours, 12,317 cycles
Part
Actuator
Part number
418575
Part serial
MX621865
Condition
Leaking
Location
Stab Trim
Part time
46,472 hours, 12,142 cycles
Stage of operation
CL
How discovered
O
Nature of condition
K, J
Precautionary procedure
O

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

What was found

AFTER SLAT RETRACT ON CLIMB-OUT, RECEIVED " HYD 3 ELEV OFF " ALERT. APPROX 5 MINS LATER, GOT "HYD 3 FAIL" ALERT. COMPLIED WITH QRH. MANUALLY EXTENDED GEAR ON APPROACH. HYD LEAK FROM NR 1 HORIZ STAB TRIM MOTOR BODY. R & R STAB TRIM MOTOR, MM 27-43-30-4. DURING OPS CHECK, FOUND "HOR STAB TRIM RATE CTRL 2" C/B POPPED. TROUBLESHOT & C/B STAY IN AFTER DISCON ELEC CON FROM M1-16, BUT TRIPS WHEN STATES ABOVE. CONNECTOR RECONNECTED. TROUBLESHOT & FOUND SHORT INSIDE OF DUAL SOL VALVE ON M1-16 TRIM MOT. REF WDM 22-22-01 P501. R & R PER MM 27-43-41-4 & H-STAB HYD OPS NORM NO LEAKS PER MM 27-40-00-5. FCC-1/-2 AFS RTS PER MM 22-01-01-5 & ALL TESTS PASS. ACFT RTS. PER MM 22-01-01-5 & ALL TESTS PASS.

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