Service difficulty report · Floor Support · Boeing 737990ER

Difficulty date
January 11, 2024
Submitted
January 26, 2024
Operation
Air carrier
Aircraft
N407AS
Make and model
Boeing 737990ER
Aircraft serial
41731
Aircraft time
41,970 hours, 13,088 cycles
Part
Floor Support
Part number
143A7501105
Condition
Corroded
Location
Bs 500l-500j
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

FWD PIT FLOOR STA 500L RBL 13.84 IS CORRODED. GROUNDED - YES. EVAL'D CORROSION ON FWD PIT FLOOR SUPPORT STA 500L RBL 13.84. HAS 100% MAT LOSS AND IS FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2.4.B.(2). REMOVED & REPLACED WITH NEW FWD PIT FLOOR SUPPORT PN: BAC1520-1397 7050-T76511 & PN: BAC1509-100688 7050-T 76511 FROM STA 500J+12 TO STA 500L RBL 13.84 IAW B737-900ER SRM 53-00-53-2R-3.