Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
July 11, 2025
Submitted
August 15, 2025
Operation
Air carrier
Aircraft
N902WN
Make and model
Boeing 7377H4
Aircraft serial
36615
Aircraft time
57,234 hours, 33,409 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

CORROSION AROUND NUT PLATE HOLE FASTENER AT BS 986 RBL 43 WL 208. EVALUATED CORROSION AROUND NUT PLATE HOLE FASTENER AT BS 986 RBL 43 WL 208. BLEND WAS 1'X.3'X.040'. BLEND FOUND TO BE OUT OF LIMITS IAW SRM 53-70-51-1A-1 PARAGRAPH 4. H. (2) (B) FIGURE 103 DETAIL C. REMOVED DAMAGE ON FLOORBEAM AT BS 986 RBL43 WL 208 IAW SRM 53-70-51-2R-6 PARAGRAPH 2. K. (2) (A). HFEC INSPECTED BLEND AREA PER NDTM PT6 51-00-00 PROCEDURE 23; NO CRACKS NOTED. FABRICATED; LOCATED AND DRILLED & DEBURRED REPLACEMENT PARTS IAW SRM 51-40-05; SRM 53-70-51-2R-6 PARAGRAPH 2. TABLE 204 ALTERNATE 4. STRAP WAS FABRICATED ANGLE, HEAT TREATED PER CUSTOMER RO NO 860625-SWA JOB# 548082. FILLER FABRICATED. CUSTOMER RO NO 1045436-SWA JOB# 584649. TREATED AND PRIMED IAW SRM 53-70-51-2R-6 PARAGRAPH 4. K. L. SHOT PEENED THE CUT EDGE WITH 100% COVERAGE IAW SOPM 20-10-03 PARAGRAPH 4. TABLE 2. INSTALLED REPAIR PARTS IAW SRM 51-40-02; SRM 53-70-51-2R-6 PARAGRAPH 4. TABLE 204. ALTERNATIVE 4.

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