Service difficulty report · Support Channel · Boeing 7377H4

Difficulty date
June 3, 2021
Submitted
July 16, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Support Channel
Condition
Corroded
Location
Fuselage
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 SUPPORT CHANNEL BS 259-270; BL 0; WL 207.5 ; / [01] REMOVED CORROSION ON SUPPORT CANNEL BS262-BS270 LBL3-RBL3 WL207.5;6'X8' AREA I.A.W SRM 51-10-02-0G-0; [02] CORROSSION ON SUPPORT CHANNEL BS262-BS270 LBL3-RBL3 WL207.5 FOUND TO BE OUT LIMITS ORIGINAL MATERIAL THICKNESS IS 0.040' REMAINING MATERIAL THICKNESS IS 0.034' I.A.W SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 FIG104 GROUP2 PAR4.B(2)FIG105 DETAIL C;E; [03] CORRECTION SUPPORT CHANNEL ITEM 1; [04] CORRECTION SUPPORT CHANNEL ITEM 1; [05] REMOVED DAMAGED SUPPORT CHANNEL BS 259-270; BL 0; WL 207.5 PER SRM 51-40-02-0G-0.; [06] LOCATED AND DRILLED NEW SUPPORT CHANEL BS 259-270; BL 0; WL 207.5 PER SRM 51-40-05-0G-0.; [07] VERIFIED LOCATED AND DRILLED NEW SUPPORT CHANEL BS 259-270; BL 0; WL 207.5 PER SRM 51-40-05-0G-0.; [08] OK TO INSTALL NEW SUPPORT CHANNEL BS 259-270; BL 0; WL 207.5.; [09] OK TO INSTALL; [10] INSTALLED NEW SUPPORT CHANNEL BS 259-270; BL 0; WL 207.5 PER SRM 51-40-02-0G-0; BOEING DWG # 141A5210; AND EA M-21-153-00277 (CUST SYSTEM ID: TTG8Q005FP4A).; [11] VERIFIED INSTALLATION; [12] VERIFIED JOB COMPLETE; [13] VERIFIED INSTALLATION OF SUPPORT CHANNEL AT BS 259-270 BL0 WL 207.5 IAW EA ON CUSTOMER SYSTEM ID TTG8Q005FP4A; [14] CLARIFIED LOCATION WORK VERIFIED

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