SDR USAA2012010900033

Service difficulty report · Jackscrew · Boeing 737401

Difficulty date: January 7, 2012
Submitted: January 9, 2012
Operation: Air carrier
Aircraft: N406US
Make and model: Boeing 737401
Aircraft serial: 23876
Aircraft time: 63,921 hours, 43,064 cycles
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Jackscrew
Condition: Lack Of Lube
Location: Te Flap
Stage of operation: DE
How discovered: O
Nature of condition: F
Precautionary procedure: O

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

What was found

CREW REPORTED THEY PUT FLAPS TO 15 FROM 5 AND GOT SPLIT FLAPS. NEEDLE JUMPED AND EVEN OUT, SO THEY PUT FLAPS TO 15 BUT WOULD NOT GO BEYOND 15. ON TAXI-IN, FLAPS RETRACTED NORMALLY. LANDED WITH 15. NO ASSYMETRY NOTICED. MAINTENANCE VISUALLY INSPECTED ALL FLAPS AND COMPONENTS. OPS CHECKED FLAPS UP AND DOWN SEVERAL TIMES. UNABLE TO DUPLICATE PROBLEM. LUBRICATED JACKSCREW/BALLNUT RESERVOIRS IAW J/C 03T30927001. OPS CHECK GOOD.