SDR TWRA9794

Service difficulty report · Control Unit · Boeing 747121

Difficulty date
May 10, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N609FF
Make and model
Boeing 747121
Aircraft serial
20354
Part
Control Unit
Part number
69050006
Condition
Malfunction
Location
Upper Rudder
Stage of operation
CR
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING TAKEOFF, RUDDER RATIO LIGHT CAME ON. RE-SEATED CONNECTOR ON RUDDER RATIO COMPARATOR. OPS CHKS OK PER MM 27-21-12, PAGES 501-504. ITEM REPEATED 5-12-97. REPLACED UPPER RUDDER CONTROL UNIT. SYSTEM OPS CK OK PER MM 27-21-12. RUN-UP CK IAW MM 27-00-00. AIRCRAFT RETURNED TO SERVICE. (X)