Service difficulty report · None · Boeing 737

Difficulty date
August 19, 2022
Submitted
September 22, 2022
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 737
Aircraft serial
33855
Aircraft time
57,460 hours, 34,246 cycles
Part
None
Part number
141A55051
Condition
Corroded
Stage of operation
IN
How discovered
9
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 344 FLOOR BEAM UPPER FLANGE HAS CORROSION COMMON TO FASTENER HOLES AT LBL 11 AND BL 0; WL 208.1. / FOUND OUT OF LIMITS FABRICATED REPAIR TIE FROM AND10136 EXTRUSSION LOT# 1415860-1; 2 STRAP FROM 7075T6;0.125 LOT # 1369715-1 AND 2 ANGLES FROM 7075T6;0.125 LOT# 1501675-1 IAW SRM 53-1051-2R-10 ; APPLY CHEMICAL CONVERSION IAW AMM 51-21-41-370-802; OK TO APPLY PRIMER;[15] VERIFIED CORRECTIVE ACTION 13 AND 14;.PLUGED EXISTING TOOLING HOLE IN THE WEB IAW SRM 53-10-51-2R-10;STEP E; INSTALLED REPAIR PARTS AT FLOOR BEAN BS 344 ;LB 0 TO LBL 11 ; WL 208.1 IAW SRM 53-10-51-2R-10;LOCATED & DRILLED -6 ANGLE FITTINGS 2 EACH ITEM # MFAB53-BK-012 LOT# 1501851-1 OBTAINED FROM STOCK PO# 881341 FOR INTERCOSTALS @ RBL11; LBL11 STA 344 - STA 360; FABRICATED -7 FILLERS FROM 7075T6 X .020 LOT# 1489798-1 FABRICATED -8 & -11 FILLERS FROM 7075T6 X .190' LOT# 5075961-1; FABRICATED -10 FILLERS FROM 7075T6 X 125' LOT# 1469335-1. ACCOMPLISHED IAW EA 22-153-02676 REV A; LOCATED & DRILLED -6 ANGLE FITTINGS 1 EACH ITEM # MFAB53-BK-012 LOT# 1501851-1 OBTAINED FROM STOCK PO# 881341 FOR INTERCOSTALS @ BL 0; STA 344 - STA 360; FABRICATED -7; 2 FILLERS FROM 7075T6 X .020 LOT# 1489798-1 FABRICATED -8 & -11 FILLERS FROM 7075T6 X .190' LOT# 5075961-1; FABRICATED -10 FILLERS FROM 7075T6 X 125' LOT# 1469335-1. ACCOMPLISHED IAW EA 22-153-02676 REV A.INSTALLED INTERCOSTALS AND REPAIR PARTS BETWEEN BS 34 TO BS 360 ; RBL 11; LBL 11 ; LB 0 IAW SRM 53-10-51-2R-10 AND EA 22-153-02676 REV A;