Service difficulty report · Control Unit · Boeing 75721B

Difficulty date
October 30, 2020
Submitted
December 1, 2020
Operation
Air carrier
Aircraft
N934FD
Make and model
Boeing 75721B
Aircraft serial
24331
Aircraft time
59,961 hours, 38,967 cycles
Part
Control Unit
Part number
251N224120
Part serial
V933F2
Condition
Worn
Location
Elevators
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

EXCESSIVE ELEVATOR PLAY, FIRST FEW INCHES OF ELEVATOR YOLK INPUT, A DEAD SPOT WAS NOTED, WHERE THERE WAS VERY LITTLE RESISTANCE OR FEEL. VERY NOTEABLE DURING TO AND LANDING PHASE. PERF CAT I AUTOLAND AS FUNCTION CHECK AND OPERATIONS CHECKED GOOD. REMOVED AND REPLACED THE ELEVATOR FEEL AND CENTERING UNIT, REF BOEING 757-200 M/M 27-31-17-2 THROUGH STEP 3G (13). COMPLETED ELEV FEEL UNIT TEST FROM M/M 27-31-17-2, FROM TEST, STEP 3G 14 AND FORWARD AS REQUIRED, TESTS WERE GOOD.

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