Service difficulty report · Angle · Boeing 7378H4

Difficulty date
March 17, 2023
Submitted
April 11, 2023
Operation
Air carrier
Aircraft
N8527Q
Make and model
Boeing 7378H4
Aircraft serial
36946
Aircraft time
20,252 hours, 9,861 cycles
Part
Angle
Condition
Corroded
Location
Zn 200 Fus Top
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 WET AREA Z-ANGLE BS 992; LBL 33; WL 208.<[01] REMOVED CORROSION ON Z ANGLE COMMON TO SHEARWEB UPPER SURFACE STA 992; LBL 33; WL 208. AREA BLENDED 1' X 1' ORIGINAL MATERIAL THICKNESS IS.050' REMAINING MATERIAL THICKNESS IS .038 NO LIMIT FOUND; SRM 51-10-02-0G-0 REPLACEMENT OF PART IS APPLICABLE.;[02] VERIFIED CORRECTIVE ACTION STEP 1.;[03] REMOVED Z ANGLE COMMON TO SHEARWEB UPPER SURFACE STA 992 LBL 33 WL 208 IAW SRM 51-40-02-0G-0 LOCATED AND DRILLED NEW Z ANGLE IAW SRM 51-40-05-0G-0 OK TO INSTALL;[04] VERIFIED CORRECTIVE ACTION #3;[05] VERIFIED MEASUREMENTS;[06] INSTALLED NEW Z ANGLE AND FILLET SEALED AT BS 992 LBL 33 WL 208 IAW SRM 51-40-02-0G-0; AMM 51-31-00-390-804 AND BOEING DWG 147A5700 INSTALLED 2 EA NUT PLATES COMMON TO Z ANGLE IAW SRM 51-40-10-2R-0 AND BOEING DWG 147A5700;[07] VERIFIED CORRECTIVE ACTION #6

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