Service difficulty report · Floorbeam · Boeing 73771B

Difficulty date
August 20, 2024
Submitted
October 1, 2024
Operation
Air carrier
Aircraft
N7852A
Make and model
Boeing 73771B
Aircraft serial
29371
Aircraft time
51,472 hours, 32,335 cycles
Part
Floorbeam
Condition
Corroded
Location
Zone 200
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

AFT FLOOR STRUCTURE - MULTIPLE SPOTS CORROSION ON UPPER FLANGE FLOOR BEAM BS 1006; LBL 17.5 WL 208 (MARKED)<[01] SUMMARY: CORROSION WAS REMOVED IN SEVERAL SPOTS ON UPPER FLANGE OF FLOOR BEAM BS1006 LBL 17.5 WL208. INITIAL DETERMINATION WAS OUT OF LIMITS IAW SRM 53-70-51-1A-1. THE BLEND WAS REPAIRED IAW EA 24-153-02344. FINAL FINISHES WERE APPLIED.;[02] SUMMARY: CORROSION WAS REMOVED IN SEVERAL SPOTS ON UPPER FLANGE OF FLOOR BEAM BS1006 LBL 17.5 WL208. INITIAL DETERMINATION WAS OUT OF LIMITS IAW SRM 53-70-51-1A-1. THE BLEND WAS REPAIRED IAW EA 24-153-02344. APPLIED CHEMICAL CONVERSION AND PRIMER IAW SRM 51-20-01-0G-0 & AMM 51-21-72-370-804;[03] CERTIFY ACTION 2.;[04] VERIFIED C0MPLETE;[05] VERIFIED ALL STEPS COMPLETED.

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