Service difficulty report · Floor Support · Boeing 737890

Difficulty date
May 24, 2024
Submitted
July 3, 2024
Operation
Air carrier
Aircraft
N506AS
Make and model
Boeing 737890
Aircraft serial
35690
Aircraft time
57,193 hours, 17,458 cycles
Part
Floor Support
Part number
146A750124
Condition
Corroded
Location
Bs 794-807
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 PIT FLOOR SUPPORT HAS CORROSION BETWEEN STA 794-807 RBL 13.84. GROUNDED - YES. REMOVED THE CORROSION FROM THE AFT PIT FLOOR SUPPORT AT STA 794-807, RBL 13.84 IAW B737-800 SRM 53-00-53-1A-2.2.0 ORIG THICKNESS IS .070" IAW B737-800 SRM 53-60-53-01-2 TABLE 2. REMOVED .040" REMAINING THICKNESS IS .030" AND IS FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2.4.B.(2) . REPAIRED AFT PIT FLOOR SUPPORT FROM STA 747+10 TO 887 RBL 13.84 USING EXISTING SPLICES IAW B737-800 SRM 53-00-53-2R-3 AND SOPM 20-20-02 AND B737-800 AMM 51-21-41 AND B737-800 AMM 51-21-72.51-21-41 AND B737-800 AMM 51-21-72.