What was found
B.S. 663 LOWER COMPOSITE BULKHEAD HORIZONTAL STIFFENER IS CRACKED AT L.B.L. 7; W.L. 150; AROUND FASTENER. / REPLACED STIFFENER AS PER: EA 1-757-16821 REV IR AND ATS ER 20-01427 REV IR
- Difficulty date
- January 21, 2020
- Submitted
- August 23, 2021
- Operation
- Air carrier
- Aircraft
- N426WN
- Make and model
- Boeing 7377H4
- Aircraft serial
- 29830
- Aircraft time
- 61,080 hours, 36,269 cycles
- System (JASC)
- 5312 · Fuselage Main, Bulkhead
- Part
- Stiffener
- Condition
- Cracked
- Location
- Bs 663 Bulkhead
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.