Service difficulty report · Skin · Boeing 7377H4

Difficulty date
June 2, 2021
Submitted
July 22, 2021
Operation
Air carrier
Aircraft
N418WN
Make and model
Boeing 7377H4
Aircraft serial
29823
Aircraft time
65,911 hours, 38,694 cycles
Part
Skin
Condition
Corroded
Location
Bs 1091 S24l-25r
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 ON FUSELAGE SKIN AT B.S. 1091; BETWEEN STRINGERS 24L AND 24R. ; / [01] REMOVED DECORATIVE EXTERIOR PAINT TO F.O.M. AT DISCREPANCY AREA PER AMM 51-21-11; [02] REMOVED CORROSION BY BLEND OUT AT DISCREPANCY AREA AND<BR>PERFORMED VISUAL INSPECTION WITH A 10-POWER MAGNIFYING GLASS TO MAKE SURE ALL OF THE CORROSION WAS REMOVED. AREA L= 24.5' W=1.5' PER SRM 51-10-02.; [03] VERIFIED CORROSION REMOVED AT STA 1091 24L TO 24R; . NO CRACKS NOTED. TOOL ID ATS1465; N600; [07] EVALUATED BLEND OUT ORIGINAL MATERIAL THICKNESS 0.080'; REMAINING 0.069'. BLEND OUT IS AROUND ON MORE THAN 3 FASTENER IN ALL GROUP OF EIGHT.THEREFORE FOUND TO BE OUT OF LIMITS PER REF SRM 53-00-01-1A-1 DETAIL E; [08] VERIFIED IS OUT OF LIMITS PER SRM.; [09] TREATED AND PRIMED ACCOMPLISHED ON EA 21-153-01786. APPLIED DECORATIVE EXTERIOR PAINT AT DISCREPANCY AREA PER AMM 51-21-99; [10] VERIFIED STEP 9; [11] APPLIED DAMAGE IDENTIFICATION AS PER SWA MPM 52.03.01.04 PARAGRAPH 1.; [12] ' AS PER EA 21-153-01786; THE DAMAGE IS ACCEPTABLE AS A CONTINUE-IN-SERVICE CONDITION WITHOUT REPETITIVE INSPECTIONS AND NO TERMINATING ACTION REQUIREMENTS; [13] VERIFIED ENTRIES 11 AND 12. CARD COMPLETE; [14] VERIFIED CARD COMPLETE

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