Service difficulty report · Flange · Boeing 7377H4

Difficulty date
September 24, 2022
Submitted
November 9, 2022
Operation
Air carrier
Aircraft
N201LV
Make and model
Boeing 7377H4
Aircraft serial
29854
Aircraft time
59,586 hours, 35,374 cycles
Part
Flange
Condition
Corroded
Location
Zn 100 Fus Lower
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

CORROSION ON STA 344 FLOOR BEAM UPPER FLANGE FROM LBL 7 TO LBL 13; WL 208. / [01] SRM 53-10-51-0I-2 IDENTIFICATION 2 AND SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 ARE APPLICABLE TO THIS A/C;17] FABRICATED 2 EA REPAIR STRAPS FROM MATERIAL 7075T6 #.125 LOT NBR 1369715-1 PER REF SRM 53-10-51-2R-10 REPAIR 10 AND EA 22-153-02934;[29] FABRICATE REPAIR PARTS FOR INTERCOSTAL AT BLO:<BR><BR> FABRICATED; LOCATED AND DRILL -6 FITTING FROM MACINE SHOP; -11 FROM 7075T6#0.090' CLAD PLUS 7075T6#0.090' CLAD LOT# 1482311-1; -8 FROM 7075T6#0.090' CLAD PLUS 7075T6#0.090' CLAD LOT# 1482311-1; -10 FILLER FROM 7075T6#0.071' CLAD LOT# 1497836-1; -7 FILLER FROM 7075T6#0.020' CLAD LOT# 1489798-1. TREATED ALL REPAIR PARTS AND OK TO PRIME IAW SRM 53-10-51-2R-10 REPAIR 10 AND PER EA#22-153-02934.<BR><BR>FABRICATE REPAIR PARTS FOR INTERCOSTAL AT LBL 11:<BR><BR> FABRICATED; LOCATED AND DRILL -6 FITTING FROM MACINE SHOP; -8 FILLER FROM 7075T6#0.090' CLAD PLUS 7075T6#0.090' CLAD LOT# 1482311-1; -10 FILLER FROM 7075T6#0.071' CLAD LOT# 1497836-1; -7 FILLER FROM 7075T6#0.020' CLAD LOT# 1489798-1. TREATED ALL REPAIR PARTS AND OK TO PRIME IAW SRM 53-10-51-2R-10 REPAIR 10 AND PER EA#22-153-02934;[34] FABRICATED (2EA) -5 FILLERS AND (2EA) -9 STRUCTURAL FILLERS FROM 0.125' (EACH) 7075T6 LOT # 1234079 ; FOR PANEL BREAK BETWEEN BS 344 AND BS 328 AT LBL 11 ; LOCATED AND DRILLED ALL FILLERS IAW SRM

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