Service difficulty report · Floor Support · Boeing 737990ER

Difficulty date
June 2, 2025
Submitted
June 27, 2025
Operation
Air carrier
Aircraft
N264AK
Make and model
Boeing 737990ER
Aircraft serial
36360
Aircraft time
31,500 hours, 10,248 cycles
Part
Floor Support
Part number
146A750134
Part serial
UNK
Condition
Corroded
Location
Zone 100
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 RBL 13.8 STA.820 IS CORRODED. GROUNDED - YES. REMOVED FLOOR PANEL 140CF IAW AMM 25-52-10, EVALUATED FLOOR SUPPORT @ RBL 13.8 STA 820, FOUND OUT OF LIMITS IAW SRM 53-00-53-1A-2 DETAIL D & BAC 1520-1397 REV: A, REMOVED .030 REMAINING .040. REMOVED FLOOR SUPPORT IAW SRM 53-00-53-2R-3 AND SRM 51-40-02, IAW SRM 53-00-53-2R-3, MACHINED SUPPORT EXTRUSION IAW SRM 53-00-53-2R-3 & DWG #146A7501 REV:-, FABRICATED SPLICE & FLOOR SUPPORT IAW SRM 53-00-53-2R-3 & DWG 146A7501 REV:-, ALODINED NEW SPLICE & FLOOR SUPPORT IAW 51-21-41, PRIMED NEW SPLICE & FLOOR SUPPORT IAW AMM 51-21-72, INSTALLED NEW SPLICE & FLOOR SUPPORT IAW SRM 53-00-53-2R-3 & DWG 146A7501REV:-, INSTALLED FLOOR PANEL 140CF IAW AMM 25-52-10 & SEALED FLOOR PANEL 140CF IAW 51-31-00.