What was found
EVIDENCE OF CRACK ON L1 DOOR UPPER SILL CENTER SECTION
- Difficulty date
- April 30, 2020
- Submitted
- May 1, 2020
- Operation
- Air carrier
- Aircraft
- N742CK
- Make and model
- Boeing 747446
- Aircraft serial
- 24424
- Aircraft time
- 104,850 hours, 22,436 cycles
- System (JASC)
- 5320 · Fuselage Miscellaneous Structure
- Part
- Door Sill
- Condition
- Cracked
- Location
- Fuselage
- 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.