SDR WLDA200489

Service difficulty report · Computer · Doug MD11

Difficulty date
August 16, 2004
Submitted
August 19, 2004
Operation
Air carrier
Aircraft
N275WA
Make and model
Doug MD11
Aircraft serial
48631
Engine
Pwa PW4462
Part
Computer
Part number
4059001908
Part serial
94030622
Condition
Inoperative
Location
Nr 1
Stage of operation
LD
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

UNCOMMANDED ELEV MOVEMENT. CONSIDERABLE CONTROL COLUMN PULL FORCE REQUIRED DURING INITIAL ROTATION TO ATTAIN REQUIRED T/O CLIMBOUT PITCH ATTITUDE UNTIL 500-800 FT AGL. AFTER FLAP RETRACTION, FORCE REQUIRED RETURNED TO NORMAL, CNTRL COLUMN OSCILLATED(TWICE) BETWEEN FLAP RETRACT, SLAT RETRACT SPEED. AFTER SLAT RETRACTION RECD (MISC) NO AUTOLAND ALERT, CNTRL FORCES RETURNED TO NORMAL. DURING MANUALLY FLOWN DESCENT, APPROACH, CNTRL OSCILLATED, CREATED UNCOMMANDED NOSE DOWN MVMT WHEN STABLE ON FINAL.(ELEV FORCES HEAVIER THAN NORMAL DURING TAXI PRE-T/O CNTRL CHECK, SAME AFTER LANDING). REMOVED, REPLACED FCC1, CURRENT FAULT SHOWS ELEV LOAD FEEL ACTUATOR FAIL. PLACARDED ELEV LOAD FEEL SYS 1 CHANNEL INOP.

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