Service difficulty report · Hydraulic System · Doug MD11F

Difficulty date
July 29, 2026
Submitted
July 29, 2026
Operation
Air carrier
Aircraft
N583FE
Make and model
Doug MD11F
Aircraft serial
48421
Aircraft time
100,248 hours, 23,835 cycles
Part
Hydraulic System
Condition
Failed
Location
Zone 100
Stage of operation
CL
How discovered
O
Nature of condition
M, J
Precautionary procedure
A

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

What was found

FLIGHT STARTED WITH MEL 29-08-01-01 OPERATING WITH HYD MANUAL. PASSING THROUGH APPROXIMATELY 5000 FT, HYD 2L OFF ALERT CAME ON. SYS WENT TO 2R AND WITHIN 10 SECS IT FAILED ALSO. BOTH RMPS WERE ON FROM T/O. DECLARED AN EMERGENCY & RETURNED TO MEMPHIS. PERFORMED HSC RTS LIKE PREVIOUS WRI 29-11/7046, RAN THROUGH ALL OPS OF PUMPS/LRUS CONTROLLED BY THE HSC, NO FAULTS. FOLLOWED FIM TASK 29-10-06, RAN NR 2 ENGINE 30 MINS WITH NO FAULTS, HYD TEMPS STARTED AT 46*C AT BEGINNING OF RUN & CLIMBED TO A MAXIUM OF 67*C DURING 30 MIN ENG RUN, FIM TASK TEMP THRESHOLD IS 100*C BEFORE COMPONENTS OR OTHER REQUIRMENTS NEEDED TO BE MET. ALL TESTS PASSED IAW FIM. PERFORMED OPS CHECKS IAW 29-12-00, NO FAULTS FOUND.

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