- Difficulty date
- April 21, 2001
- Submitted
- April 25, 2001
- Operation
- Air carrier
- Aircraft
- N680UP
- Make and model
- Boeing 747SR46
- Aircraft serial
- 20923
- Aircraft time
- 60,103 hours, 32,223 cycles
- Part
- Frame
- Condition
- Cracked
- Location
- Nr 4 Pylon
- 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:C3 NR 4 PYLON PYLON AFT TORQUE BULKHEAD O/B VERTICAL CHORD, CRACK FOUND AT 2ND FASTENER HOLE (FROM LOWER) RUNNING O/B APPROX. 0.100 INCH LONG. NR 4 PYLON AFT TORQUE BULKHEAD O/B VERTICAL CHORD CRACKED HOLE O/SIZE FASTENER INSTALLED WITH FREEZE PLUG IAW UPS-HKG-01-00015H AND UPS-HK-01-00016.