Service difficulty report · Actuator · Boeing 7572B7

Difficulty date
February 18, 2012
Submitted
February 20, 2012
Operation
Air carrier
Aircraft
N206UW
Make and model
Boeing 7572B7
Aircraft serial
27808
Aircraft time
57,320 hours, 20,994 cycles
Part
Actuator
Part number
5006397R
Part serial
6946
Condition
Damaged
Location
Le Flaps
Part time
56,711 hours, 20,836 cycles
Stage of operation
AP
How discovered
O
Nature of condition
F, J
Precautionary procedure
O

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

What was found

FLT 1033, DEPARTING, BOTH FLAP POINTERS ON 1/2 WITH THE FLAP LEVER UP. L/E SLAT DISAGREE DISPLAYED. THE CREW WAS ABLE TO GET THE LIGHT TO EXTINGUISH, AND CONTINUED TO CLT. UPON ARRIVAL TO CLT, AN EMERGENCY WAS DECLARED AND A NO FLAPS LANDING WAS MADE. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. FOUND NR 5 SLAT INBD ACTUATOR AT FAULT (MAKING GRINDING NOISES WHEN TURNED). REPLACED INBD NR 5 SLAT ROTARY ACTUATOR. L/E SLAT SYSTEM TESTED GOOD. FAILED AS RECEIVED TEST DUE TO LOW EFFICIENCY & LOCK OUT AT START-UP. 1 PLANETARY PIN, 3 WASHERS & 160 NEEDLE BEARINGS CORRODED REQUIRING REPLACMENT. PLANETARY CAGE REQUIRES RE-WORK, TORQUE LIMITER REQUIRES RESHIMMING.

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