Service difficulty report · Support · Boeing 7377BD

Difficulty date
March 5, 2023
Submitted
April 3, 2023
Operation
Air carrier
Aircraft
N556WN
Make and model
Boeing 7377BD
Aircraft serial
33936
Aircraft time
37,398 hours, 21,958 cycles
Part
Support
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

AFT CARGO BAY - CORROSION ON SIDEWALL SUPPORT AT RBL 22 BS 727+15; BS 727+118; BS 727B+6; BS 727B+10; BS 727B+14; BS747+2 / RBL 20.5 BS 747+5; BS 747+8.25; BS 747+11.75; BS 747+15.25.<[01] VERIFIED APPLICABILITY OF SRM 53-60-53-01-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE LIMIT.;[02] PARTIALLY COMPLETED STEPS 1-10;[03] PARTIALLY COMPLETED STEPS 1-10; ALL AREAS OUT OF LIMITS<BR>VERIFIED CORRECTIVE ACTION #1;[04] VERIFIED MEASUREMENTS;[05] VERIFIED MEASUREMENTS;[06] COMPLETED STEPS 1-10; FABRICATED; LOCATED AND DRILLED AFT CARGO BAY SIDEWALL SUPPORT AT RBL 22 BS 727-767 PER SRM#51-40-05-0G-0 AND DWG# 146A7502; USING MATERIAL BAC1496-377#7075T62 LOT#1515191-1<BR>OK TO APPLY CHEMICAL CONVERSION COATING AND PRIMER;[07] VERIFIED STEPS 1 - 10 COMPLETED.<BR>VERIFIED CORRECTIVE ACTION ITEM 6.<BR>OKAY TO APPLY CHEMICAL CONVERSION COATING AND PRIMER GIVEN.;[08] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON AFT CARGO BAY SIDEWALL SUPPORT BS 727- BS 767 PER SRM#51-20-01 AND SOPM#20-41-02;[09] VERIFIED CORRECTIVE ACTIONS STEP 8.

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