Service difficulty report · Support · Boeing 7377BD

Difficulty date
December 14, 2022
Submitted
January 26, 2023
Operation
Air carrier
Aircraft
N7713A
Make and model
Boeing 7377BD
Aircraft serial
33919
Aircraft time
57,380 hours, 30,141 cycles
Part
Support
Condition
Corroded
Location
Bs 500c
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. CARGO BAY WALL SUPPORT SHIELD BS 500C; BS 500C+2 ;500C+9;500C+14; 500C+18<[01] VERIFIED APPLICABILITY SRM 53-30-53-01-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE.<BR><BR>REMOVED CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL26 BS500+18 IAW SRM 51-10-02.<BR><BR>EVALUATED DAMAGE REMOVAL AT BLENDED AREA L=1.300' W=0.1.100' ORIGINAL THICKNESS 0.040' PER BAC1496-444 REMAINING 0.026' LOSS 0.014'; MAX MAT REMOVE ALLOWABLE 0.004'; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PARAG 4A (2) FIG 103 DETAIL D.<BR>TOOL ID: ATS1672 S/N: 65092939 DUE:03/2023;[02] UPDATE MEASUREMENTS;[03] VERIFIED CORRECTIVE ACTION 1.<BR>COMPLETED STEPS 1-4;[04] FABRICATED; LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT RBL 26 FROM BS 500 TO BS 500C IAW SRM 51-40-05-0G-0 AND DWG 143A7500; MATERIAL USED BAC1496-444 #7075 T62 LOT.1509343-1<BR>REQUIRE CHEMICAL CONVERSION COATING AND PRIME.;

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