Service difficulty report · Sidewall Support · Boeing 73776N

Difficulty date
August 23, 2021
Submitted
October 4, 2021
Operation
Air carrier
Aircraft
N7822A
Make and model
Boeing 73776N
Aircraft serial
32596
Aircraft time
59,949 hours, 29,584 cycles
Part
Sidewall Support
Condition
Corroded
Location
Fuselage
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 FLOOR TO SIDEWALL SUPPORT FROM STA 727 TO STA 847; LBL 22; WL 154 ; / [01] UPDATED MEASUREMENTS; [02] CORROSION ON SUPPORT WAS FOUND TO BE OUT OF LIMITS DUE TO PROXIMITY HOLES PER SRM 53-00-53-1A-2 FIG 103 DETAIL D; [03] VERIFIED CORROSION ON SUPPORT WAS FOUND TO BE OUT OF LIMITS DUE TO PROXIMITY HOLES PER SRM 53-00-53-1A-2 FIG 103 DETAIL D; [04] REMOVED ACB FLOOR TO SIDEWALL SUPPORT AT BS727 - BS847; LBL22; WL154 PER SRM 51-40-02-0G-0; [05] FABRICATED; LOCATED AND APPLIED CHEMICAL CONVERSION COATING TO ACB FLOOR TO SIDEWALL SUPPORT AT BS727 - BS847 AND SPLICE REPAIR AT BS727E+8 - BS 727E+18 USING BAC1496-377#7075T62 LOT#1467164-1 PER SRM 51-40-05-0G AND DWG 146A7500; SRM 53-00-53-2R-5; AMM 51-21-41-370-80; [11] VERIFIED APPLIED PRIMER TO FLOOR TO SIDEWALL SUPPORT PER AMM 51-21-72-370-804.; PER SRM 51-40-02 AND DWG 146A7502; [18] ALL WORK COMPLETE; [19] VERIFIED ALL WORK COMPLETE; [20] THE CORRECT SELECT REF IS 53-00-53-2R-5-A00957. NO FOLLOW ON REQUIREMENTS REQUIRED.; [21] CERTIFY STEP 20

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