Service difficulty report · Skin · Boeing 7377H4

Difficulty date
June 9, 2021
Submitted
July 19, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Skin
Condition
Corroded
Location
Bs 727e
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 FUSELAGE SKIN AT AFT CARGO BAY BS727E+17 BL0 WL149. ; / [01] REMOVED DAMAGE ON FUSELAGE SKIN IN ACB BS 727E+17 BL0 WL149 IAW SRM 53-00-01-1A-5; [02] REMOVED DAMAGE IN AN AREA OF 1.5'X 1.3' IAW SRM 53-00-01-1A-5; [03] VERIFIED; [04] VERIFIED REMOVED DAMAGE ON FUSELAGE SKIN IN ACB BS 727E+17 BL0 WL149 IAW SRM 53-00-01-1A-5; [05] UT INSPECTED BLEND IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2; LOWEST THICKNESS = 0.030'<BR><BR>CAL ID ATS2031 E650; [06] DAMAGE REMOVAL IN ACB BS727E+17 BL0 WL149 REMAINING THICKNESS IS .030'; ORIGINAL THICKNESS OF .045'; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-01-1A-5.; [07] UPDATED MEASUREMENTS; [08] VERIFIED DAMAGE REMOVAL IN ACB BS727E+17 BL0 WL149 FOUND TO BE OUT OF LIMITS IAW SRM 53-00-01-1A-5; [09] TRIMMED OUT DAMAGE ON FUSELAGE SKIN IN ACB BS727E+17 BL0 WL149 IN AN AREA OF 1.5'X 1.4' IAW SRM 51-10-02-0G-0; [10] REMOVED 10(EA) FASTENERS ON FUSELAGE SKIN AT BS747 IAW SRM 51-40-02-0G-0; [11] VERIFIED DAMAGE AND FASTENER REMOVAL; [12] ET INSPECTED CUT OUT AND HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23 AND PROCEDURE 16; NO CRACKS NOTED.<BR><BR>CAL ID IS000450 N500D; [13] ALL OTHER WORK WILL BE ACCOMPLISHED ON FAULT # TTG8Q005DWRQ; [14] VERIFIED ALL ADDITIONAL WORK TO BE ACCOMPLISHED ON FAULT # TTG8Q005DWRQ; [15] 'REFER TO TTG8Q005DWRQ FOR REPAIR RESOLUTION '; [16] CERTIFIED

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