Service difficulty report · Web · Boeing 73776N

Difficulty date
June 5, 2023
Submitted
July 5, 2023
Operation
Air carrier
Aircraft
N7811F
Make and model
Boeing 73776N
Aircraft serial
28654
Aircraft time
58,393 hours, 34,757 cycles
Part
Web
Part number
UNKNOWN
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 UNDERSIDE OF CREASEBEAM WEB; STA 719; RBL 65; WL 208.<[01] UPDATED TABLE; SRM 53-40-13-1A-1 IS APPLICABLE ALLOWABLE DAMAGE.;[02] REMOVED 2 EA FASTENERS FOR ACCESS COMMON TO CREASEBEAM WEB; STA 719; RBL 65; WL 208 PER SRM 51-40-02-0G-0.;[03] REMOVED CORROSION ON UNDERSIDE OF CREASEBEAM WEB; STA 719; RBL 65; WL 208. MAX MATERIAL REMOVED WAS .012' 1.5' BY 1.3' FROM .045'. OUT OF LIMITS PER SRM 53-40-13-1A-1.;[04] VERIFIED CORRECTIVE ACTION STEPS 1;2 AND 3.;[05] REMOVED DAMAGED CREASEBEAM WEB; STA 716-727; RBL 65-RBL 70; WL 208.;[06] UPDATED TABLE;[07] RECEIVED NEW CREASE BEAM WEB PER CUSTOMER RO NO. 924042-SWA.;[08] LOCATED AND DRILLED NEW CREASEBEAM WEB PER. SRM 51-40-05-0G-0; AND BOEING DWG 144A5920 REV:- TREATED AND APPLIED PRIMER SRM. 51-20-01-0G-0; OK TO INSTALL IS REQUESTED.;[09] UPDATED REPAIR TYPE IN PARTS TABLE;[10] RECEIVED ATSHFAB CREASE BEAM WEB STA 719 RBL 65 WL 208; FABRICATED PER BOEING DWG #144A5925 CUSTOMER WORK ORDER# 924042-SWA OK TO INSTALL;[11] ACCOMPLISHED CONFORMITY INSPECTION ON ATS HFAB-WB-011; SHEAR WEB CONFORMS TO BOEING DRAWING 144A5925 REV H.;[12] VERIFIED CORRECTIVE ACTION STEPS 8 AND 10. VERIFIED OK TO INSTALL.;[13] PARTIAL INSTALLED CREASE BEAM WEB AT STA 719; RBL 65; WL 208; PER SRM 51-40-02-0G-0 AND BNG DWG # 144A5920;[14] INSTALLED CREASE BEAM WEB AT STA 719; RBL 65; WL 208; PER SRM 51-40-02-0G-0 AND BNG DWG # 144A5920;[15] VERIFIED CORRECTIVE ACTION 14 AND MEASUREMENT TABLE

More about the Boeing 737-76N