Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 29, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N447WN
Make and model
Boeing 7377H4
Aircraft serial
33720
Aircraft time
58,733 hours, 34,620 cycles
Part
Support
Part number
146A75022
Condition
Corroded
Location
Aft Cargo Bay
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 AT AFT CARGO BAY BS727D+10 RBL21 WL156. ; / REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BS727D+10' RBL21 WL156 ;DIMENSION. L=2'X W=1.2' DEPTH:.010 IAW SRM 51-10-02.PARA#15;EVALUATED FLOOR TO SIDEWALL SUPPORT;0RIGINAL THICKNESS .040' REMAINING THICKNESS .030 DAMAGE EXCEED 10% ORIGINAL THICKNESS;FOUND TO BE OUT LIMITS IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 LOCATED AND DRILLED SIDEPLATE BTW BS 727- BS767; RBL 21;WL 156. IAW SRM 51-40-05-0G-0 DWG# 146A7500;DWG#146A7502 INSTALLED SIDEPLATE BTW BS 727- BS767; RBL 21;WL 156. IAW SRM 51-40-02-0G-0 DWG# 146A7500;DWG#146A7502.; [12] VERIFIED INSTALLED SIDEPLATE BTW BS 727- BS767; RBL 21;WL 156. IAW SRM 51-40-02-0G-0 DWG# 146A7500;DWG#146A7502.

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