Service difficulty report · Baffle · Boeing 7377H4

Difficulty date
June 10, 2021
Submitted
June 30, 2021
Operation
Air carrier
Aircraft
N400WN
Make and model
Boeing 7377H4
Aircraft serial
27891
Aircraft time
66,325 hours, 39,077 cycles
Part
Baffle
Condition
Cracked
Location
Bs 500a-500b
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

FOUND 1 EACH BAFFLE CRACKED AT FWD CARGO COMP. BETWEEN STA 500A THRU 500B STR 25R ; / [01] FABRICATED ANGLE DOUBLER REPAIR; [02] VERIFIED CRACK DIMENSIONS AND LOCATION.; [03] FABRICATED REPAIR ANGLE PER B737-700 SRM 53-30-53-2R-1; MATERIAL USED 7075-T6.032' PO# 1641456.; [04] CUT OUT NEW BAFFLE TOP FLANGE TO LIGHTNING HOLE TO FACILITATE INSTALLATION OF WIRE BUNDLE PER B737-700 SRM 53-30-53-2R-1 FIG 202.; [05] VERIFIED STEPS 3 AND 4; FABRICATED REPAIR ANGLE PER B737-700 SRM 53-30-53-2R-1; MATERIAL USED 7075-T6.032' PO# 1641456. CUT OUT NEW BAFFLE TOP FLANGE TO LIGHTNING HOLE TO FACILITATE INSTALLATION OF WIRE BUNDLE PER B737-700 SRM 53-30-53-2R-1 FIG 202; [06] PERFORMED HFEC ROTO ON OPEN FASTENER HOLES ON REPAIR ANGLE AND BAFFLE IAW NDTM PART 6 ;51-00-00 PROCEDURE 16. NO CRACKS. [07] ACCOMPLISHED VISUAL INSPECTION; NO DEFECT NOTED. [12] REMOVED CRACKED BAFFLE FROM FWD CARGO BETWEEN STA 500A AND 500B PER B737-700 SRM 51-40-02-0G-0.; [13] VERIFIED REMOVED CRACKED BAFFLE FROM FWD CARGO BETWEEN STA 500A AND 500B PER B737-700 SRM 51-40-02-0G-0.; [14] OK TO INSTALL NEW BAFFLE.; [15] STARTED INSTALLATION OF REPAIR AND NEW BAFFLE BETWEEN STA 500A AND 500B RBL 24 PER B737-700 SRM 53-30-53-2R-1 AND B737-700 SRM 51-40-02-0G-0.; [16] COMPLETED INSTALLATION OF REPAIR ON NEW BAFFLE AND INSTALLED NEW BAFFLE PER B737-700 SRM 51-40-02-0G-0 AND DRWG #143A7505

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