What was found
DURING ROUTINE MAINTENANCE IN PYLON NR 4 A RIB WAS FOUND WITH A 6 INCH CRACK ON IT'S WEB. THE CRACK IS AT NAC STA 236.5 AND WL 148 ON THE LEFT SIDE OF THE PYLON ADJACENT TO THE PNEUMATIC DUCT FITTING.
- Difficulty date
- June 11, 1999
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N152UA
- Make and model
- Boeing 747222B
- Aircraft serial
- 23737
- System (JASC)
- 5400 · Nacelle/Pylon Structure
- Part
- Rib
- Condition
- Cracked
- Location
- Nr 4 Pylon
- Stage of operation
- IN
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.