Service difficulty report · Bolt · Boeing 747122

Difficulty date
June 14, 2000
Submitted
June 21, 2000
Operation
Air carrier
Aircraft
N852FT
Make and model
Boeing 747122
Aircraft serial
19757
Aircraft time
84,021 hours, 20,887 cycles
Part
Bolt
Part number
BACB30US7K9
Condition
Sheared
Location
Pylon Mount
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

ON PYLONS NR 1, 3 AND 4, SHEARED .375 BOLTS ON HORIZONTAL FIRE WALL ADJACENT TO THE AFT MOUNT LUGS. BOLTS ARE VERTICAL THROUGH AFT MOUNT FITTING AND LOWER PYLON SKIRT CHORDS. REMOVED AND REPLACED ALL 8 BOLTS PER PYLON. REPLACED WITH OVERSIZED TO .4375 PER BOEING LETTER PAO-LGB-00-00006H. ACCOMPLISHED PHASE II HARD LANDING INSPECTON.