Service difficulty report · Bear Strap · Boeing 7377H4

Difficulty date
March 13, 2022
Submitted
April 18, 2022
Operation
Air carrier
Aircraft
N947WN
Make and model
Boeing 7377H4
Aircraft serial
36924
Aircraft time
38,976 hours, 23,532 cycles
Part
Bear Strap
Part number
146A812814
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 FOUND AFT CARGO COMPARTMENT BEAR STRAP AT STA 827 +7 RBL 19 WL 155.5 AROUND FASTENER HOLES. / [01] REMOVED CORROSION AT AFT CARGO COMP. BEAR STRAP AT STA 827 + 7 RBL 19 PER B737-700 SRM 51-10-02-0G-0;[02] VERIFIED REMOVAL;[03] PERFORMED UT THINKNESS INSP ON REWORKED AREA. IAW B 737 NDT PART 4 51-00-00 PROCE 3. TOOL 27MG. BC 172139. CALIB DUE 4-1-22. MINI THICK 0.083'.- ORIGINAL MATERIAL FOR THE BEAR STRAP=.100'. STRAP FOUND OUT LIMITS PER SRM 53-60-15-1A-1.MAT.REMOVED=.017' MAT.REMAINING=.083';[06] VERIFIED STEP #5 (CORRECTION);[07] REMOVED AFT CARGO COMP. BEAR STRAP AT STA 827 + 7 RBL 19 PER SRM 51-40-02-0G-0;[08] LOCATED AND DRILLED NEW STRAP AS PER REF B737-700 SRM 51-40-05-0G-0.<BR>PERFORMED BY A BELLO # 29776 INSTALLED NEW BEAR STRAP AT AFT CARGO COMPARTMENT AT STA 827+7 RBL 19 WL 155.5 AS PER REFERENCE B737-700 SRM 51-40-02-0G-0 AND DWG # 146A8120.;[12] REMOVED CORROSION AT AFT CARGO COMP. BEAR STRAP AT STA 827 + 7 RBL 19 PER B737-700 SRM 51-10-02-0G-0. PERFORMED UT THINKNESS INSP ON REWORKED AREA. IAW B 737 NDT PART 4 51-00-00 PROCE 3. TOOL 27MG. BC 172139. CALIB DUE 4-1-22. MINI THICK 0.083'.<BR>STRAP FOUND OUT LIMITS PER SRM 53-60-15-1A-1.MAT.REMOVED=.017' MAT.REMAINING=.083' LOCATED AND DRILLED NEW STRAP AS PER REF B737-700 SRM 51-40-05-0G-0. INSTALLED NEW BEAR STRAP AT AFT CARGO COMPARTMENT AT STA 827+7 RBL 19 WL 155.5 AS PER REFERENCE B737-700 SRM 51-40-02-0G-0 AND DWG # 146A8120.;[13] FINAL INSPECTION; BEAR STRAP REPLACED.

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