Service difficulty report · Angle · Boeing 7377H4

Difficulty date
March 21, 2023
Submitted
April 24, 2023
Operation
Air carrier
Aircraft
N957WN
Make and model
Boeing 7377H4
Aircraft serial
41528
Aircraft time
38,518 hours, 23,626 cycles
Part
Angle
Condition
Cracked
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

SUPPORT ANGLE CRACKED; BS663; RBL42 36 IN BELOW PRESSURE DECK; FWD SIDE OF 663 VAPOR BARRIER SUPPORT ANGLE IS MARKED<[01] UPDATED PARTIAL STEPS 1 AND 2;[02] RECEIVED NEW ANGLE HFAB53-AN-002 (2024T0#0.063'') PER DWG# 111A1322-6 HEAT TREATED TO T42 CONDITION PER BAC5602 LOT# 1419330-1 IAW CUSTOMER RO# 913306-SWA JOB# 558417.;[03] FABRICATED; LOCATED AND DRILLED NEW ANGLE IAW SRM 51-40-05-0G-0 AND DWG# 111A1322.;[04] VERIFIED CORRECTIVE ACTION #2; #3.;[05] APPLIED CHEMICAL CONVERSION COATING ON NEW ANGLE IAW SRM 51-20-01 OK TO PRIMER;[06] VERIFIED CORRECTIVE ACTION ITEM 5. OKAY TO PRIME PART GIVEN.;[07] APPLIED PRIMER ON NEW ANGLE SUPPORT VAPOR BARRIER BS 663 IAW SOPM 20-41-02 AND APPLIED FINISH ABRASION RESISTANT TEFLON COATING IAW AMM 51-21-81-370-802; DWG 111A1322;[08] OK TO INSTALL NEW ANGLE SUPPORT;[09] VERIFIED CORRECTIVE ACTION #7<BR>OK TO INSTALL NEW ANGLE SUPPORT GIVEN;[10] INSTALLED FASTENERS ON SUPPORT ANGLE BELOW PRESSURE DECK FWS SIDE VAPOR BARRIER COMMON TO THE FUEL TANK AT BS 663 RBL 5 TO RBL 65 IAW SRM 51-40-02-0G-0 AND DWG 111A1000;[11] VERIFIED CORRECTIVE ACTION #10;[12] INSTALLED SUPPORT ANGLE BELOW PRESSURE DECK FWS SIDE VAPOR BARRIER AT BS 663 RBL 5 TO RBL 65 IAW SRM 51-40-02-0G-0 AND DWG 111A1000; APPLIED CAP SEAL AROUND FASTENER ON SUPPORT ANGLE BELOW PRESSURE DECK FWS SIDE VAPOR BARRIER COMMON TO THE FUEL TANK AND AFT SIDE COMMON TO THE VAPOR BARRIER AT BS 663 RBL 5 TO RBL 65 IAW AMM 51-31-00-390-805; CARD IS COMPLETED;

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