Service difficulty report · Rail · Boeing 737790

Difficulty date
August 8, 2022
Submitted
August 26, 2022
Operation
Air carrier
Aircraft
N560WN
Make and model
Boeing 737790
Aircraft serial
30542
Aircraft time
70,697 hours, 34,642 cycles
Part
Rail
Condition
Corroded
Location
Aft 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 AFT CARGO BAY RAIL AT LBL 12 BS 767+5. / [01] CORROSION AREA IS LOCATED ON PREVIOUS REPAIR SECTION THEREFORE FOUND TO BE OUT OF LIMITS PER REF SRM 51-10-02-0G-0;[02] REMOVED DAMAGE SECTION PER REF SRM 53-00-53-2R-2 REPAIR 2;[03] CORRECTION ENTRY 1 AND 2 : VERIFY APPLICABILITY PER REF SRM 53-00-53-1A-2 AND SRM 53-60-53-0I-2<BR><BR>REMOVED CORROSION ON AFT CARGO BAY RAIL AT LBL 12 BS 767+5 REF SRM 53-00-53-1A-2 L=2 W=1;[04] CORRECTION ENTRY 1 : NOT FOUND PREVIOUS REPAIR AT DISCREPANCY AREA .;[05] VERIFIED CORROSION REMOVED AND APPLICABILITY OF SRM 53-00-53-1A-2;[06] BLEND OUT EVALUATION;THE MATERIAL LOST IS .005?? ORIGINAL MATERIAL THICKNESS IS .063'' .THEREFORE FOUND TO BE WITHIN LIMITS PER REF SRM 53-00-53-1A-2 TOOLING USED ATS2472 DUE DATE 12/2022;[07] REMOVED 2EA NUT PLATES AT DISCREPANCY AREA PER REF SRM 51-40-02.;[08] VERIFIED CORRECTIVE ACTION 6. OK TO TREAT AND PRIME.;[09] APPLIED CHEMICAL CONVERSION COATING AND PRIMER AT DISCREPANCY AREA PER REF SRM 51-20-01 AND SOPM 20-41-02;[10] VERIFIED CORRECTIVE ACTION 9;[11] INSTALLED NUTPLATES PER REF SRM 51-40-02 AND DWG NBR 146A7503;[12] VERIFIED CORRECTIVE ACTION #11.<BR>VERIFIED MEASUREMENT TABLE.