Service difficulty report · Support · Boeing 7377Q8

Difficulty date
May 7, 2022
Submitted
June 8, 2022
Operation
Air carrier
Aircraft
N7875A
Make and model
Boeing 7377Q8
Aircraft serial
29354
Aircraft time
50,797 hours, 27,672 cycles
Part
Support
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 R/H FLOOR TO SIDEWALL SUPPORT FROM STA 727B+2 TO STA 747+18; WL 156; RBL 20 TO RBL 22. / [01] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT BS 727A+4 - BS767 IAW SRM 51-40-02.<BR><BR><BR>REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT BS727D+4 ; L=2'; W=1'; MAX. MATERIAL LOSS= 0.010' WAS FOUND OUT OF LIMIT IAW SRM 53-00-53-1A-2; STEP 4.A(2)A.<BR><BR>TOOL USED:<BR>ID: ATS2472<BR>S/N: UNK.<BR>DUE: 12/2022.;[02] UPDATE MEASUREMENTS.;[03] VERIFIED CORRECTIVE ACTION #1.;[04] FABRICATED; LOCATED AND DRILLED ACB FLOOR TO SIDE WALL SUPPORT ANGLE BS 727 TO BS 767 LBL 22 MADE FROM EXTRUSION BAC1496-377 #7075T62 LOT#1490497-1 IAW SRM 51-40-05-0G-0- OK TO TREAT AND PRIME;[05] FABRICATED; LOCATED AND DRILLED ACB FLOOR TO SIDE WALL SUPPORT ANGLE BS 727 TO BS 767 LBL 22 MADE FROM EXTRUSION BAC1496-377 #7075T62 LOT#1490497-1 IAW SRM 51-40-05-0G-0- DWG 146A7500 OK TO TREAT AND PRIME;[06] VERIFIED CORRECTIVE ACTION 4 AND 5.<BR>OK TO TREAT AND PRIME;[07] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON FLOOR TO SIDEWALL AT ACB BS 727-767 RBL22 WL 156.- IAW 737-700; AMM 51-21-72-370-804; AMM 51-21-41-370-802;[08] VERIFIED CORRECTIVE ACTION #7.;[09] OK TO INSTALL ACB R/H FLOOR TO SIDEWALL SUPPORT BS 727 TO BS 767;[10] VERIFIED CORRECTIVE ACTION #9.;[11] INSTALLED ACB R/H FLOOR TO SIDEWALL SUPPORT BS 727 - BS 767 IAW SRM 51-40-02 AND DWG # 146A7500;[12] VERIFIED CORRECTIVE ACTION #11.

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