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 727d-767
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 BS727D TO 767 RBL21 WL156. ; / [01] UPDATED MEASUREMENT TABLE; [02] EVALUATED CORROSION BS 727D-767 FOUND DEEPEST MEASUREMENT AT BS 747 OF 0.020 FROM ORIG 0.040 FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING MICROMETER P/N 4566A S/N UNKOWN; [03] VERIFIED OUT OF LIMITS; [04] REMOVED ACB RH FLOOR TO SIDEWALL SUPPORT BS 727 TO 767 ; IAW SRM 51-40-02-0G-0.; [05] LOCATED AND DRILLED NEW ACB RH FLOOR TO SIDEWALL SUPPORT BS727 TO BS767; IAW SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; [06] 25 UTC<BR>LOCATED AND DRILLED NEW ACB RH FLOOR TO SIDEWALL SUPPORT BS727 TO BS767; IAW SRM 51-40-05-0G-0; SRM 51-40-02-0G-0; QC VERIFIED.; [07] OK TO INSTALL ACB FLOOR TO SIDEWALL SUPPORT BS727 TO 767 RBL21 WL156.; [08] VERIFIED NUT PLATE INSTALL AND ENAMEL COATING OK TO INSTALL FLOOR TO SIDEWALL SUPPORT BS727-767.; [09] INSTALLED ACB FLOOR TO SIDEWALL SUPPORT BS727-767 RBL21 WL21 WL156 IAW SRM 51-40-02 AND DWG #146A7500.; [10] UPDATED PARTS TABLE; [11] VERIFIED THE INSTALL OF THE ACB FLOOR TO SIDEWALL SUPPORT BS727-767 RBL21 WL21 WL156 IAW SRM 51-40-02 AND DWG #146A7500; [12] VERIFIED TASK COMPLETE

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