Service difficulty report · Floor Support · Boeing 737990ER

Difficulty date
April 25, 2025
Submitted
May 28, 2025
Operation
Air carrier
Aircraft
N453AS
Make and model
Boeing 737990ER
Aircraft serial
36354
Aircraft time
38,948 hours, 12,224 cycles
Part
Floor Support
Part number
141A5690U1
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

IN FWD GALLEY FLOOR STRUCTURE HAS AN AREA OF CORROSION IN FLOOR PANEL SCREW HOLE, JUST AFT OF STA 294.5 & LBL 10 INCHES. MARKED IN RED. GROUNDED - YES. DISPLACED CABLES MLGEA-L AND EA-L AND EB-L IAW B737-900 AMM 20-10-91. RECONNECTED AND ADJUSTED CABLE MLGEA-L IAW B737-900 AMM 32-34-00. RE-CONNECTED AND ADJUSTED CABLES EA-L AND EB-L IAW B737-900 AMM 27-31-00-820-801. REMOVED CORROSION - ORIGINAL THICKNESS .080, REMAINING .064, REMOVED .016 AND FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-10-51-1A-1. REMOVED AND REPLACED INTERCOSTAL P/N 141A5690U1 PO#1120648.2 IAW B737-900ER SRM 51-40-02 REF BAC DWG 141A5600 REV N.