Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
June 28, 2022
Submitted
August 11, 2022
Operation
Air carrier
Aircraft
N951WN
Make and model
Boeing 7377H4
Aircraft serial
36665
Aircraft time
39,132 hours, 23,683 cycles
Part
Intercostal
Condition
Corroded
Location
Cabin Floor
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 PASSENGER FLOOR INTERCOSTAL FROM STA 294.5+2 TO STA 294.5+13; WL 208.1; LBL 11. / [01] UPDATED MEASUREMENT TABLE;[02] REMOVED CORROSION IN SEVERAL AREAS ON UPPER SURFACE OF INTERCOSTAL BETWEEN BS 294.5 TO BS 312 LBL 312 IAW SRM 51-10-02-0G-0. MAX MATERIAL REMOVED WAS IN A 1X1X.012' AREA FROM 0.190' ORIGINAL THICKNESS. IN LIMITS IAW SRM 53-00-04-1A-1<BR><BR>MEASURED WITH DIAL DEPTH GAUGE ATS 401; S/N UNKNOWN; DUE 10/2022;[03] LBL LISTED IN ITEM #2 IS INCORRECT. STATEMENT SHOULD READ B.S. 294.5 TO B.S. 312 LBL 11.;[04] CORRECTED STATEMENT IN ITEM #2;[05] VERIFIED CORRECTIVE ACTIONS #1; #2 AND #3<BR>VERIFIED MEASUREMENT TABLE;[06] OK TO APPLIED CHEMICAL COMVERSION AND PRIMER PER SRM 53-00-52-1A-1 STEP 2B(1)(2);[07] CORRECTIVE STEP #6 IAW SRM 51-20-01-0G-0;[08] CERTIFY ITEM#7;[09] OK TO APPIED PRIMER IN INTERCOSTAL AREA IAW AMM 51-21-72-370-804;[10] CERTIFY ITEM#9;[11] VERIFIED CORRECTIVE ACTION #'S 6;7 AND 9<BR>OK TO APPLY GIVEN;[12] APPLIED CHEMICAL COMVERSION TO FLOOR INTERCOSTAL; IAW SRM 51-20-01-0G-0 AND PRIMER IAW AMM 51-21-72-370-804;[13] VERIFIED CORRECTIVE ACTION #12;[14] CERTIFY

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