What was found
WHILE IN FOR C-CHECK, MAINTENANCE FOUND CRACK IN LOWER FRAME WEB UNDER FRAME UPPER CHORD AT BS 1600 RBL 40. REMOVED DAMAGED SECTION OF FRAME WEB AND REPAIRED IAW SRM 51-40-02 FIG 1.
- Difficulty date
- February 1, 1996
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N691UP
- Make and model
- Boeing 747121
- Aircraft serial
- 19641
- System (JASC)
- 5311 · Fuselage Main, Frame
- Part
- Frame Web
- Condition
- Cracked
- Location
- Bs 1600
- 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.