Service difficulty report · Floorbeam · Boeing 73771B

Difficulty date
August 19, 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
V
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

BS 986 LH; WL 208; LBL 5; 18; 26; 29; 35; 38; 43 HAS CORROSION IN NUT PLATE HOLES.<[01] REMOVED CORROSION FROM UPPER FLANGE OF BS 986.5 FLOOR BEAM; LBL 29-LBL 31; WL208 IN AN AREA OF 1'X.8'X.060' PER SRM 53-70-51-1A-1 2.B. CORROSION STILL EXISTS; ORIGINAL THICKNESS IS .150' AND REMAINING<BR>THICKNESS IS 0.090' FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1 PARA. 4D (2) FIG. 103 DETAIL A. USING MICROMETER ID: ATS1672 DUE DATE:03/2025<BR><BR>BS 986 FLOOR BEAM UPPER FLANGE LBL 5- LBL43; WL 208 WILL BE REPAIRED ON CUSTOM CARD TTG8Q00VBFUH;[02] MADE A STATEMENT ON TTG8Q00VBFUH THAT THIS CARD WAS TRANSFERRED

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