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 867-887
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 FLOOR TO SIDEWALL SUPPORT BS867 -BS887 RBL21 WL167. ; / [01] UPDATED MEASUREMENT TABLE; [02] EVALUATED CORROSION; FOUND 0.020 REMOVED FROM ORIG 0.040 IN 1'X1' AREA FOUND TO BE OUT OF LIMITS AT BS 867+5 PER SRM 53-00-53-1A-2 USING MICROMETER P/N 4566A S/N UNKOWN; [03] VERIFIED OUT OF LIMITS; [04] REMOVED ACB FLOOR TO SIDEWALL SUPPORT BS 867 TO BS887 RBL21; IAW SRM 51-40-02-0G-0.; [05] LOCATED AND DRILLED NEW ACB RH FLOOR TO SIDEWALL SUPPORT BS887 TO BS867 IAW SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; [06] LOCATED AND DRILLED NEW ACB RH FLOOR TO SIDEWALL SUPPORT BS887 TO BS867 IAW SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; VERIFIED.; [07] REQUEST OK TO INSTALL; [08] VERIFIED OK TO INSTALL.; [09] INSTALLED ACB RH FLOOR TO SIDEWALL SUPPORT BS 867-887 PER SRM 51-40-02; DWG#146A7500.; [10] VERIFIED FLOOR TO SIDEWALL SUPPORT RBL 21 BS 867-887 INSTALLED; [11] VERIFIED JOB COMPLETE

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