Service difficulty report · Web · Boeing 73776N

Difficulty date
July 15, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N7723E
Make and model
Boeing 73776N
Aircraft serial
32670
Aircraft time
48,099 hours, 24,239 cycles
Part
Web
Condition
Corroded
Location
Fwd Cargo
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 FWD CARGO BAY SUB THRESHOLD WEB BS 464 RBL 28 WL 156 ; / [01] REMOVAL CORROSION ON FWD CARGO BAY SUB THRESHOLD WEB BS 464 RBL 28 WL 156 ; MEASURES L=2.5' X W= 1.8' X D=0.018' MAX MAT LOSS IS 0.018' REMAINING THICKNESS 0.027' FOUND OUT OF LIMITS REWORKED AREA IAW. SRM 53-00-53-1A-2;ALLOWABLE DAMAGE 2 PARAGRAPH 4.A.(2)(A) DETAIL D FIG.103; AND SRM 53-30-15-0I-1 IDENTIFICATION 1 TABLE 4 ITEM 3 FIG.5 . ORIG. THICKNESS 0.045' . USED TOOL DEPTH GAUGE ID:ATS400; DUE DATE:04/2022; [02] VERIFIED CORROSION REMOVAL; EVALUATED; AND FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2; [03] LOCATED AND DRILLED NEW FWD CARGO BAY SUB THRESHOLD WEB ITEM: 54003-58 LOT #1463905-1; BS 440 TO BS 490 RBL28 WL156 IAW SRM 51-40-05-0G-0 AND DWG #143A8122.<BR>THE ENAMEL PAINT IS DOCUMENTED ON TASK CARD TTG8Q004CVKC; DRILLED NEW FWD CARGO BAY SUB THRESHOLD WEB ITEM: 654A0003-58 LOT #1463905-1; BS 440 TO BS 490 RBL28 WL156 IAW SRM 51-40-05-0G-0 AND DWG #143A8122.

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