SDR IPXA12B71372

Service difficulty report · Skin · Boeing 74745E

Difficulty date: January 18, 2012
Submitted: February 3, 2012
Operation: Air carrier
Aircraft: N578UP
Make and model: Boeing 74745E
Aircraft serial: 27154
Aircraft time: 81,457 hours, 13,958 cycles
System (JASC): 5512 · Horizontal Stabilizer, Plate/Skin
Part: Skin
Part number: 65B036025
Condition: Cracked
Location: Horizontal Stab
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

INSPECTION TYPE:3C, RT SIDE HORIZONTAL STAB UPPER REAR SPAR HORIZONTAL SPLICE PLATE AREA WAS FOUND 2 EA FASTENER HOLES CRACKED IN SKIN LAYER. REPAIRED IAW HX RS R-55-10-37291 REV A & EO B747-5510-45851-A, ORI MATERIAL IS 7075T6511-0.313", 2 EA CRACKS AT HOLE NR 6 ARE 0.030" APPROX & 1 EA CRK HOLE NR 8 IS 0.030" APPROX, AT HOLES NR 6 & NR 8 INSTALL BACB30US8K, Y BOLTS WITH NUTS & WASHERS IAW SB 747-55A-2050, REV 1 & AT HOLES NR 5 & NR 7 INSTALL BACB30US7K, Y BOLTS WITH NUTS AND WASHER.

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