Service difficulty report · Tension Tie · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Tension Tie
Part number
147A57441
Condition
Corroded
Location
Wet Area
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 TENSION STRAP AT AFT WET AREA BS1016+13 RBL3 WL208. / [01] REMOVED CORROSION ON TENSION STRAP AT BS 1016+13; RBL3 IN A 3'X1' AREA; MAX DEPTH .003'. ORIGINAL THICKNESS IS .050'. FOUND TO BE WITHIN LIMITS PER SRM 53-70-51-1A-1.;[02] REMOVED CORROSION ON TENSION STRAP AT BS 1016+13; RBL3 IN A 3'X1' AREA; MAX DEPTH .003'. ORIGINAL THICKNESS IS .050'. FOUND TO BE WITHIN LIMITS PER SRM 53-70-51-1A-1; MEASURED WITH DIAL DEPTH GAUGE CAL ID: ATS2677.;[03] REMOVED CORROSION ON TENSION STRAP AT BS 1016+13; RBL3 IN A 3'X1' AREA; MAX DEPTH .016'. ORIGINAL THICKNESS IS .050'. FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1; MEASURED WITH DIAL DEPTH GAUGE CAL ID: ATS2677; AND DENT GAUGE CAL ID: ATS2595.;[04] VERIFIED CORRECTIVE ACTION #3; OUT OF LIMITS;[05] REMOVED TENSION STRAP AT BS 1006-1030; RBL3; WL208 PER SRM 51-40-02-0G-0.;[06] LOCATED AND DRILLED NEW 147A5744-1 STRAP AT BS 1006-1030; RBL3; WL208 PER DWG 147A5730 AND SRM 51-40-05. OK TO INSTALL.;[07] VERIFIED CORRECTIVE ACTION #6;[08] INSTALLED NEW TENSION STRAP AT AFT WET AREA BS.1006 TO 1030 RBL3 ; WL208 IAW SRM 51-40-02 AND DWG 147A5730 REV:C;[09] CERTIFY;[10] VERIFIED CORRECTIVE ACTION 8;[11] VERIFIED ALL STEPS COMPLETE.

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