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
Bs 797
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 WEB AT AFT CARGO BAY BS797 RBL19 WL159. ; / [01] REMOVED CORROSION ON ACB WEB BS797 RBL 19 WL 159 IAW SRM 51-10-02-0G-0; EVALUATED AREA AND FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1 PART 4G(2); MEASURES OF MATERIAL REMOVED L=3.0'' X W=1.0'' X D=0.015'' ORIGINAL THICKNESS TH=0.056'' TOOL USED CALIPER ID:ATS1317 S/N:UNKNOWN; MICROMETER ID:ATS1672 S/N:65092939. PART REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02-0G-0 PART 9; [02] VERIFIED REMOVED CORROSION ON ACB WEB BS797 RBL 19 WL 159 IAW SRM 51-10-02-0G-0; EVALUATED AREA AND FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1 PART 4G(2); MEASURES OF MATERIAL REMOVED L=3.0'' X W=1.0'' X D=0.015'' ORIGINAL THICKNESS TH=0.056'' TOOL USED CALIPER ID:ATS1317 S/N:UNKNOWN; MICROMETER ID:ATS1672 S/N:65092939. PART REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02-0G-0 PART 9; [03] REMOVED ACB WEB FROM BS794 - BS847 RBL 21 IAW SRM 51-40-02; [04] LOCATED AND DRILLED ACB WEB BS794 - BS847 RBL19 IAW SRM 51-40-05-0G-0 AND DRAWING#146A8123.<BR>OK TO INSTALL; [05] VERIFIED LOCATE & DRILL OF ACB WEB AT BS 794 - BS 847 RBL 19 IAW SRM 51-40-05-0G-0 AND DRAWING# 146A8123.<BR>OK TO INSTALL GIVEN.; [06] INSTALLED ACB WEB FROM BS 794 - BS847 RBL 19 IAW SRM 51-40-02 AND IAW DWG# 146A8121; [07] VERIFIED INSTALLATION OF ACB WEB FROM BS 794 - BS847 RBL 19 IAW SRM 51-40-02 AND IAW DWG# 146A8121

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