Service difficulty report · Shield · 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
Shield
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 FWD SHIELD AT ACB BS767 - BS787 RBL21 WL157.<[01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS ON FWD SHIELD AT ACB BS 767 TO BS 787 RBL21 WL 157 IAW SRM 51-10-02;[02] NO ALLOWABLE DAMAGE LIMITS IN SRM REPAIR BY REPACEMENT IAW SRM 51-10-02-0G-0 PARAGRAPH # 9;[03] REMOVED FWD SHIELD AT ACB BS767 - BS787 +6 RBL21 WL157 IAW SRM 51-40-02;[04] VERIFIED CORRECTIVE ACTIONS 2.;[05] LOCATED AND DRILLED NEW SHIELD ASSEMBLY P/N 146A8127U12 LOT: 1532291-5 IAW SRM 51-40-05 AND DWG 146A0081.<BR>REQUIRE TOP COAT.;[06] VERIFIED CORRECTIVE ACTION STEP 5. VERIFIED OK TO TOP COAT.;[07] APPLIED TOP COAT BMS10-11 TYPE II ENAMEL ON FWD SHIELD PER AMM 51-21-73-370-804.<BR>REQUIRE TO APPLY CORROSION INHIBITING COMPOUND.;[08] VERIFIED CORRECTIVE ACTION STEP 7. VERIFIED OK TO CIC.;[09] APPLIED CORROSION INHIBITING COMPOUND ON FWD SHIELD PER SRM 51-20-01.<BR>OK TO INSTALL FWD SHIELD;[10] VERIFIED OK TO CIC;[11] CORRECTION TO STEP 10: CIC PREVIOUSLY GIVEN.;[12] VERIFIED CORRECTIVE ACTION ITEM 9; OK TO INSTALL.;[13] INSTALLED FWD SHIELD ON ACB BS 767 - BS 787 +6 RBL 21 WL 157 IAW SRM 51-40-02 AND DWG 146A0081;[14] VERIFIED CORRECTIVE ACTION #13 AND MEASUREMENT TABLE