Service difficulty report · Support · Boeing 737752

Difficulty date
July 21, 2023
Submitted
August 17, 2023
Operation
Air carrier
Aircraft
N7887A
Make and model
Boeing 737752
Aircraft serial
35123
Aircraft time
50,547 hours, 26,200 cycles
Part
Support
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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 AT ACB BS727E - BS767 RBL21 WL157.<[01] VERIFIED SRM 53-60-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE.;[02] STEPS 1 AND 2 FOUND TO BE OUT OF LIMITS.;[03] VERIFIED CORRECTIVE ACTION 1 AND UPDATED STEP 1 & 2;[04] REMOVED FLOOR TO SIDEWALL SUPPORT AT ACB BS 727 TO BS 767 RBL 21 WL 157 IAW SRM 51-40-02.;[05] LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT P/N 146A7502-51 LOT: 1534305-2 IAW SRM 51-40-05 AND DWG 146A7500.<BR><BR>REQUIRE TO APPLY TOP COAT;3] CORRECTIVE ACTION 12<BR>REMOVED AND INSTALLED NEW FLOOR TO SIDEWALL SUPPORT<BR>P/N 146A7502-51 LOT: 1534305-2<BR>ON ACB BS 727 TO BS 767 RBL 21 WL 157 IAW SRM 51-40-02<BR>DWG 146A7500 AND DWG 146A7502<BR>ALL WORK COMPLETED.;[14] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 12 AND MEASUREMENT TABLE.