Service difficulty report · Adc · Doug MD11F

Difficulty date
February 6, 2020
Submitted
February 6, 2020
Operation
Air carrier
Aircraft
N602FE
Make and model
Doug MD11F
Aircraft serial
48402
Aircraft time
86,961 hours, 21,933 cycles
Part
Adc
Part number
4059060904
Part serial
91010302
Condition
Failed
Location
Nr 1
Part time
85,100 hours, 11,603 cycles
Stage of operation
CR
How discovered
O
Nature of condition
G, J
Precautionary procedure
A

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

What was found

FOLLOWING LIGHT TURBULENCE AND PRECIPITATION AT 370 SIMULTANEOUS AP1 DISCONNECT ACCOMPANIED BY WINDSHEAR DET FAIL, SELECT FADEC ALT, SEL EVEV FEEL MAN SEL FLAP LIM OVRD AND ALT MISCOMPARE ON PFD. RAN QRH AIRSPEED UNRELIABLE CHECK LIST SWAPPED TO AUX ON 1 UPPER MAINT PANEL. APPEARED TO FIX ISSUE (CADA1) BUT AFTER 20 MIN, CADC FAILED. RERAN AIRSPEED UNRELIABLE AND PUT F/O ON 1 (CADA AND FLT DIR) REPLACED NR 1 CADC AND NR 2 CADC PER AMM 34-16-01-4.

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