Service difficulty report · Floorbeam · Boeing 737990ER

Difficulty date
February 24, 2026
Submitted
March 24, 2026
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
36,408 hours, 11,334 cycles
Part
Floorbeam
Part number
147A555832
Condition
Corroded
Location
Zone 200
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

AFT WET AREA BS1016 RBL 30 FLOOR STRUCTURE CORRODED. A(K352). GROUNDED - YES. REMOVED CORROSION IAW SRM 53-70-51-1A-1. ORIG MAT .150, REMAINING MAT .070. MAT LOSS OF .080 IS BEYOND ALLOWABLE LIMITS. REPAIRED AREA IAW EA 900ER-53EA-30025 REV 00. THIS IS A CATEGORY A REPAIR.