Service difficulty report · Support · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
April 22, 2022
Operation
Air carrier
Aircraft
N769SW
Make and model
Boeing 7377H4
Aircraft serial
30588
Aircraft time
74,146 hours, 43,614 cycles
Part
Support
Part number
143A75014
Condition
Corroded
Location
Fwd Cargo Bay
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 COMPARTMENT R/H FLOOR TO SIDEWALL SUPPORT AT STA 500A+5 TO STA 500C+15; RBL 24; WL 156. / [01] VERIFIED APPLICABILITY FOR ALLOWABLA DAMAGE LIMITS OF FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT BS 500A+5 TO 500C+15 ;RBL 24 ;WL 156.IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[02] REMOVED CORROSION ON FWD CARGO COMPARTMENT R/H FLOOR TO SIDEWALL SUPPORT ( BTW STA 500A+5'500C+15';RBL 24 ;WL 156;IAW SRM 51-10-02 PARAGRAPH 15); EVALUATED ALL REWORKED AREAS;THE DEPPEST AREA BS 500A+5 RBL 24 WL 156; DIMENSION:L=2'X W=1'X DEPTH=0.011';ORIGINAL THICKNESS 0.040 REMAINING THICKNESS 0.029; FOUND TO BE OUT OF LIMITS ALLOWABLE DAMAGE LIMITS;IAW SRM 53-00-53-1A-2;ALLOWABLE DAMAGE 2 FIGURE#103 ;DEATIL 'E';TOOL USED MICROMETER ID ATS400 S/N UNKNOWN;DUE 08/2022;[03] VERIFIED ACTION 1;2;[04] FABRICATED LOCATED AND DRILLED ON FWD CARGO COMPARTMENT R/H NEW FLOOR TO SIDEWALL SUPPORT BS 500A TO BS 500D RBL 24 WL 156;MATERIAL USED BAC1496-444#7075T62;EXTRUSION;LOT#1485395-1;IAW SRM 51-40-05 AND DWG 143A7501 REV:A.APPLY CHEMICAL CONVERSION COATING AND PRIMER.;[05] INSPECTED ACTION 4;[06] APPLIED CHEMICAL CONVERSION COATING AND PRIMER FWD CARGO COMPARTMENT R/H NEW FLOOR TO SIDEWALL BS 500A TO BS 500D RBL 24 WL 156 IAW SRM 51-20-01 AND AMM 51-21-72-370-804.;[07] VERIFIED CORRECTIVE ACTION ENTRY 6. CARD COMPLETE.

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