Service difficulty report · Support · Boeing 73773V

Difficulty date
August 2, 2021
Submitted
September 3, 2021
Operation
Air carrier
Aircraft
N7839A
Make and model
Boeing 73773V
Aircraft serial
30243
Aircraft time
57,802 hours, 35,522 cycles
Part
Support
Condition
Corroded
Location
Aft Cargo
Stage of operation
IN
How discovered
V
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 FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS766 - BS787 LBL21 WL157. ; / REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS766- BS787 LBL21 WL157; P/N 143A7502-1 IN AREA 0.4''X0.3''X0.020'' DEEP; ORIGINAL THICKNESS 0.040''; FOUND TO BE OUT OF LIMIT IAW SRM 53-00-53-1A-2; PAR. 4.A FABRICATED NEW FLOOR TO SIDEWALL SUPPORT ITEM BAC1496-377#7075T62 C LOT # 145325-1 BS 727-747+10; LBL 21; WL 157; IAW PER SRM 51-40-05 DWGS: 146A7502; [05] VERIFIED FABRICATED NEW FLOOR TO SIDEWALL SUPPORT ITEM BAC1496-377#7075T62 C LOT # 145325-1 BS 727-747+10; LBL 21; WL 157; IAW PER SRM 51-40-05 DWGS: 146A7502; [06] APPLIED CHEMICAL CONVERCION COATING AND PRIMER ON NEW FLOOR TO SIDEWALL SUPPORT BS 727-747+10; LBL 21; WL 157 ; AMM 51-21-72-370-804; AMM 51-21-41-370-802 OK TO INSALL; [07] CORRECTED MEASUREMENTLATE ENTRY : FABRICATED (1EA) SPLICE REPAIR FROM BAC1496-377#7075T62 C LOT # 145325-1 LOCATED BTW BS747+10-BS767;LBL21; WL157; IAW SRM 53-00-53-2R-6 TABLE 201 ITEM [2] AND APPLIED TREAT AND PRIME PER SRM 53-00-53-2R-6 PARAG. 4.I.J. OK TO INSTALL.; INSTALLED NEW FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS727-BS847 LBL21 WL157 IAW SRM 51-40-02-0G-0 AND DWG 146A7502; [12] VERIFIED INSTALLED NEW FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS727-BS847 LBL21 WL157 IAW SRM 51-40-02-0G-0 AND DWG 146A7502.

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