Service difficulty report · Proximity Sensor · Boeing 737823

Difficulty date
June 30, 2020
Submitted
July 2, 2020
Operation
Air carrier
Aircraft
N936AN
Make and model
Boeing 737823
Aircraft serial
29532
Aircraft time
59,035 hours, 24,402 cycles
Part
Proximity Sensor
Part number
189929
Condition
Faulted
Location
Lt Wing
Stage of operation
LD
How discovered
O
Nature of condition
J, F
Precautionary procedure
L

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

What was found

AIRCRAFT GROUNDED: LEADING EDGE DISSAGREMENT LIGHT ILLUMINATED FROM FLAPS 5 TO 10. PEFORMED GO AROUND DECLARED EMERGENCY, QRH LANDING FLAPS 15. CONT LIGHT REMAINED ILLUMINATED THROUGHOUT LANDING. MINOR SPEED DEVIATIONS WOULD ILLUMINATE GREEN LIGHT THEN BACK TO AMBER. THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. REPLACED LEADING EDGE FLAP EXTEND PROXIMITY SENSOR S169, LEADING EDGE PROXIMITY SENSOR S995, NR 1 SLAT DETENT ARM ROLLER BEARING WHICH WAS FROZEN AND NR 4 SLAT DETENT ROLLER BEARING WHICH WAS FROZEN AND A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.