Service difficulty report · Warning System · Boeing 777222

Difficulty date
June 9, 2011
Submitted
June 10, 2011
Operation
Air carrier
Aircraft
N226UA
Make and model
Boeing 777222
Aircraft serial
30226
Aircraft time
38,886 hours, 4,753 cycles
Engine
Pwa PW40903
Part
Warning System
Condition
Malfunctioned
Location
Flap/Slat Sys
Stage of operation
NR
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

FLAP-SLAT SKEW SENSORS FAILURE OF ONE OR MORE SLAT AND-OR FLAP SKEW DETECTION SENSORS. LOSS OF SLAT AND-OR FLAP SKEW DETECTION SENSOR REDUNDANCY. STATUSMSG-2720291 ACTIVE AP HARD. DURING FLAP OPS FOUND L2A INDICATION ABNORMAL -005. SUSPECT BAD L2A SKEW SENSOR. IF NEED L2A SENSOR PCN 483- 2027. PLZ ACP WIRE CHKS BY LOWERING FLAPS TO ACCESS SKEW SENSORS, SHAKEOUT WIRING WHILE OTHER TECH MONITORS FLT CONT MAINT PG READOUTS, THIS SHOULD LOCATE AREA OF SUSPECT WIRE ISSUE.