Service difficulty report · Support · 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
Support
Condition
Corroded
Location
Bs 907-927
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 FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS907-BS927 RBL21 WL174. ; / [01] REMOVED ACB RH FLOOR TO SIDEWALL SUPPORT BS887 TO 947; IAW SRM 51-40-02-0G-0.; [02] LOCATED AND DRILLED ACB RH FLOOR TO SIDEWALL BS887 TO BS947 IAW SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; [03] LOCATED AND DRILLED ACB RH FLOOR TO SIDEWALL BS887 TO BS947 IAW SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; VERIFIED.; [04] EVALUATED CORROSION ON FLOOR TO SIDEWALL SUPPORT; FOUND 0.020 REMOVED FROM ORIG 0.040 DEEPEST LOCATION AT 907+10 FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DEPTH GAUGE P/N ATS 400 S/N UNKNOWN; [05] VERIFIED EVALUATED CORROSION ON FLOOR TO SIDEWALL SUPPORT; FOUND 0.020 REMOVED FROM ORIG 0.040 DEEPEST LOCATION AT 907+10 FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2; [06] REQUEST OK TO INSTALL; [07] VERIFIED OK TO INSTALL.; [08] INSTALLED ACB RH FLOOR TO SIDEWALL SUPPORT BS 887-947 PER SRM 51-40-02; DWG#147A7500; [09] VERIFIED INSTALLATION OF SUPPORT RBL21 BS 887-947; JOB COMPLETE

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