Service difficulty report · Rail · Boeing 737990ER

Difficulty date
September 19, 2025
Submitted
October 7, 2025
Operation
Air carrier
Aircraft
N434AS
Make and model
Boeing 737990ER
Aircraft serial
61620
Aircraft time
35,108 hours, 10,848 cycles
Part
Rail
Part number
143A948535
Condition
Corroded
Location
Zone 100
Stage of operation
IN
How discovered
O
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 CARGO AFT BULKHEAD LOWER SUPPORT CORRODED STA 500L RBL 30 TO LBL 30. GROUNDED - YES. REMOVED CORROSION ON LOWER RAIL FOUND TO BE OUT OF LIMITS, REMOVED AND REPLACED LOWER RAIL SUPPORT ON FWD CARGO AFT BULKHEAD AT STA 500L, RBL30 TO LBL 30 IAW B737-900ER SRM 53-30-08-1A-1, SRM 51-40-02-00-0. W= 2.500" O= 0.071" R= 0.035" L= 3.00" D= 0.036".