Service difficulty report · Floorbeam · Boeing 737990ER

Difficulty date
June 13, 2024
Submitted
July 19, 2024
Operation
Air carrier
Aircraft
N423AS
Make and model
Boeing 737990ER
Aircraft serial
35206
Aircraft time
40,365 hours, 12,721 cycles
Part
Floorbeam
Part number
147A550423
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

STA 947 FLOOR BEAM CORRODED AT RBL-48 ON UPPER TEE UNDER LAV MOUNT. GROUNDED - YES. REPAIRED FLOOR BEAM ON STA 947 RBL 0 & RBL 54 IAW B737-900 SRM 53-70-51-2R-5 REPAIR #5 AND EA 900ER-53EA-27198 REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-900 SRM 53-70-51-1A-1 W- 1.00 O- .180 R- .089 L- 2.50 D- .091.