Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 14, 2021
Submitted
August 18, 2021
Operation
Air carrier
Aircraft
N444WN
Make and model
Boeing 7377H4
Aircraft serial
29839
Aircraft time
61,121 hours, 35,983 cycles
Part
Support
Condition
Corroded
Location
Bs 500
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

FWD CARGO COMPARTMENT FLOOR TO SIDEWALL SUPPORT HAS CORROSION BS 500+10 TO 500+14 LBL 25 WL 156 ; / [01] UPDATED MEASUREMENTS; [02] CORROSION ON SUPPORT WAS FOUND TO BE OUT OF LIMITS DUE TO PROXIMITY TO FASTENER HOLES PER SRM 53-00-53-1A-2 FIG 103 DETAIL D; [03] REMOVED BULKHEAD SUPPORT PER SRM 51-40-02-0G-0; [04] VERIFIED CORROSION IS OUT OF LIMITS ON LEFT FLOOR TO SIDEWALL SUPPORT FROM STA 500+10 TO STA 500+14 WL 156 PER SRM 53-00-53-1A-2; VERIFIED FORWARD BULKHEAD SUPPORT REMOVED; [05] FWD BULKHEAD SUPPORT WILL BE INSTALLED ON FAULT # TTG8Q005UNSX; [06] VERIFIED TTG8Q005UNSX WILL INSTALL BULKHEAD SUPPORT; [07] BEGAN LOCATE AND DRILL FLOOR TO SIDEWALL B.S 396 TO 500 +8' BAC1496-444;7075-T62;LOT#1457271-1 AND B.S.500+8' TO 500D;BAC1496-444;7075T62;LOT#1464455-1.SPLICE PLATE-BAC1496-444 7075-T62;LOT#1464455-1 PER SRM53-0053-2R-5 AND DRW:143A7501-80; [ [10] APPLIED CHEMICAL CONVERSION AND PRIMER TO REPAIR PARTS PER SRM53-00-53-2R-5. OK TO INSTALL REPAIR PARTS; [11] INSPECTED ACTION 10; OK TO INSTALL; [12] UPDATED MEASUREMENTS; [13] INSTALLED REPAIR PARTS ON L/H FLOOR TO SIDEWALL SUPPORT AND NUTPLATES PER SRM53-00-53-2R-5 AND DRW#143A7501.[19] INSTALED FWD CARGO COMPARMENT FLOOR TO SIDEWALL SUPPORT BS 500+10 TO BS 500+14 WL 156 IAW 51-40-02-0G-0 TO DWG #143A7500 REV:A; [20] VERIFIED COMPLETION; [21] CORRECTION STEP 19 REFERENCE SHOULD HAVE BEEN SRM51-40-02-0G-0; [22] VERIFIED CORRECTION OF STEP 19; [23] VERIFIED ITEMS 19-22; [24] VERIFIED JOB COMPLETED

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