Service difficulty report · Strap · Boeing 7377H4

Difficulty date
January 10, 2023
Submitted
February 7, 2023
Operation
Air carrier
Aircraft
N209WN
Make and model
Boeing 7377H4
Aircraft serial
32484
Aircraft time
59,684 hours, 35,490 cycles
Part
Strap
Part number
NOTREPORTED
Part serial
NOTREPORTED
Condition
Corroded
Location
Zn 100 Fus Lower
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 AFT CARGO BAY TENSION STRAP AT RBL 19 BS 787+12; BS 807+8.<[01] REMOVED CORROSION ON ACB TENSION STRAP RBL19 BS787+12''; BS807+8'' IAW SRM 51-10-02-0G-0; MEASURES L=5.42'' X W=1.18''; L=1.4'' X W=1.2'' TOOL USED CALIPER ID: ATS1317 S/N: UNK DUE DATE:08/2023;[02] ORIGINAL THICKNESS:0.100''<BR>NDI UT INSPECTION REQUIRED.;[03] VERIFIED CORRECTIVE ACTION #1.;[04] NDT UT THICKNESS INSPECTED BLENDED AREAS PER 737 NDTM PART 4; 51-00-00; PROC 2; LOWEST READING IS .080' ADJ 'T' .100'.<BR>EQUIP ID ATS2341 DUE 06/23;[05] IN ADDITION STEP#4 FOR NDI;FOUND AREA TO BE OUT OF LIMITS;IAW SRM 53-60-15-1A-1 ALLOWABLE DAMAGE 1;PARAG.4(3)(B) DETAIL D FIG. 103.;[06] VERIFIED APPLICABILITY FOR SRM 53-60-15-1A-1.;[07] VERIFIED CORRECTIVE ACTION 5 AND 6;[08] REMOVED TENSION STRAP AT AFT CARGO;RBL19 ;BS767+8 TO BS867;IAW SRM 51-40-02.;[09] RECEIVED NEW TENSION STRAP WITH P/N 146A8128-14;LOT#1489525;LOCATED AND DRILLED;IAW SRM 51-40-05;DWG#146A8120.OK TO INSTALL.;[10] VERIFIED CORRECTIVE ACTION #9<BR>OK TO INSTALL GIVEN;[11] UPDATED MEASUREMENT FIELD.;[12] INSTALLED ACB TENSION STRAP RBL19 BS780-860 IAW SRM 51-40-02-0G-0 AND DRAWING# 146A8120;[13] VERIFIED CORRECTIVE ACTION #12.<BR>VERIFIED MEASUREMENTS.

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