SDR ASAA2021050334903

Service difficulty report · Floorbeam · Boeing 737890

Difficulty date: May 3, 2021
Submitted: May 27, 2021
Operation: Air carrier
Aircraft: N553AS
Make and model: Boeing 737890
Aircraft serial: 34594
Aircraft time: 51,729 hours, 17,804 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Part number: 147A56766
Condition: Corroded
Location: Bs 950 Rbl45
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

FLOOR SUPPORT STRUCTURE LOCATED AT APPROX. STA. 950, APPROX. RBL45, 4 IN. FWD. OF R2 DOOR, HAS SPOT OF CORROSION ON UPPER SURFACE. AREA MARKED IN RED. GROUNDED - YES. REMOVED AND REPLACED SUPPORT REF BAC DWG 147A5650 SH 70 & 71 REV "A"CORROSION FOUND TO BE OUT OF LIMITS REF B737-800 SRM 53-70-51. ORIGINAL THICKNESS IS .080, REMAINING IS .065, .015 WAS REMOVED. PO# 999586.1.