SDR UIEA2021020900263

Service difficulty report · Skin · Boeing 747481F

Difficulty date: February 6, 2021
Submitted: February 10, 2021
Operation: Air carrier
Aircraft: N404KZ
Make and model: Boeing 747481F
Aircraft serial: 34283
Aircraft time: 50,090 hours, 10,098 cycles
System (JASC): 5751 · Ailerons
Part: Skin
Condition: Chafed
Location: Rt Aileron
Stage of operation: IN
How discovered: V
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

CHAFED - SKIN, RH WING INBD AILERON T/E WEDGE UPPER SKIN OUTBD SIDE.(<P>REMOVE THE DAMAGED MATERIAL AREA (L = 2", W = .25", D = 2 PLIES AT RH WING INBD AILERON T/E UPR SKIN AFT EDGE. INBD EDGE) AND CLEAN BOND 4 REPAIR PLIES (L = 6", W = 4.25") USE WET LAYUP WITH RESIN. CURE AT 150 DEGREES FOR 180 MINUTES AND MAINTAINED A MINIMUM VACUUM PRESSURE AT 22 IN/HG IAW B747-400F SRM 57-60-01-2R-1 REFER TO B747-400F SRM 51-70-06-0G-0 REV 90. CONDITION CHECK IS SATISFACTORY.</P>)