SDR UPS03440241

Service difficulty report · Flap Track · Boeing 747200

Difficulty date: January 31, 2003
Submitted: February 28, 2003
Operation: Air carrier
Aircraft: N522UP
Make and model: Boeing 747200
Aircraft serial: 21936
Aircraft time: 65,143 hours, 15,580 cycles
System (JASC): 5753 · Trailing Edge Flaps
Part: Flap Track
Condition: Corroded
Location: Nr 3 Flap
Stage of operation: IN
How discovered: 9
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

INSPECTION TYPE: C, LEFT WING - NR 3 FLAP TRACK AFTER END INNER SURFACE I/B WALL AREA FOUND CORROSION (FINDING AFTER PIVOT FITTING REMOVAL). LEFT WING NR 3 FLAP TRACK AFT END INNER SURFACE INBD WALL AREA CORROSION REMOVED AND REPROTECTED REFER CWS SERIAL NR 016250, 016850 TO 16854 FOR WORK DETAILS. REF HX RS 57-53-34971 AND EO B747-5740-18331 -A. BLEND AREA 1.5 X 1.5 INCH, THICKNESS REMAIN 0.124 INCH AND ORIGINAL THICKNESS 0.207 INCH.

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