Service difficulty report · Support · Boeing 7377K9

Difficulty date
August 25, 2022
Submitted
September 26, 2022
Operation
Air carrier
Aircraft
N7878A
Make and model
Boeing 7377K9
Aircraft serial
34320
Aircraft time
52,141 hours, 25,914 cycles
Part
Support
Condition
Corroded
Location
Fwd Cargo
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 FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500+5; BS 500+10; BS 500+14; BS 500A+2; BS 500A+10; BS 500A+18; BS 500B+2; BS 500B+6; BS 500B+18; BS 500C+6. / [01] VERIFIED APLICABILITY 53-30-53-01-2 FOR IDENTIFICATION AND 53-00-53-1A-2 FOR ALLOWABLE DAMAGE;[02] REMOVED CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500+10 EVALUATED AS FOLLOW L= 1'' W= .800' D= 0.020' ORIGINAL THICNESS 0.040' FOR BAC 1496-444<BR>BLEND AREA FOUND TO BE OUT LIMITS IAW SRM 53-00-53-1A-2 STEP 4A<BR>USED TOOL ID:ATS 401 S/N: UNKNOWN DUE: 10/2022;[03] VERIFIED ACTION #2;[04] RECEIVED; LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT LBL 24 TO FWD CARGO BAY P/N 143A7501-83 I.A.W SRM 51-40-05-0G-0 AND DWG 143A7500.;[05] TASK COMPLETED;[06] CORRECTION ITEM 1 <BR>VERIFIED APLICABILITY IAW SRM 53-30-53-01-2 FOR IDENTIFICATION<BR>AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE;[07] CORRECTION ITEM 5; ALL WORK COMPLETED;[08] CORRECTION STEP 4 :CORRECT PART NUMBER N/P 143A7501-183;[09] UPDATED PART P/N 143A7501-183;[10] UPDATE MEASUREMENT;[11] UPDATE MEASUREMENTS FIELD;[12] VERIFIED CORRECTIVE ACTION 4;6 AND THE MEASUREMENT TABLE.

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