Service difficulty report · Attach Fitting · Boeing 747212B

Difficulty date
October 18, 2003
Submitted
October 31, 2003
Operation
Air carrier
Aircraft
N525UP
Make and model
Boeing 747212B
Aircraft serial
21939
Aircraft time
80,338 hours, 15,279 cycles
Part
Attach Fitting
Condition
Cracked
Location
Nr 2 Pylon
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, NR 2 PYLON DIAGONAL BRACE STEEL ATTACH FITTING HORIZONTAL FLANGE ATTACH BOLTS 6EA TORQUE CHECK FOUND LOOSE AS MARKED. THE BOLT HOLE ID MEASURED, NR 5, 7, 9 ARE 0.314 INCH NR 8, 10 ARE 0.313 INCH & NR 15 IS 0.316 INCH NDT HFEC INSP CONFIRMED CRACK FREE PER NTM PT6, 51-00-00 FIG 17. ONLY NR 5, 7, 9 & 15 BOLT HOLES WERE REAMED TO 0.328 INCH PER SB747A2196 & OVERSIZE BOLTS OF THESE 4 BOLT HOLE WERE INSTALLED & STANDARD BOLTS FOR BOLT HOLE NR 8 & 10 WERE REFITTED PER SB747A2196R.

More about the Boeing 747 212B