Service difficulty report · Baffle · Boeing 7377BD

Difficulty date
October 4, 2022
Submitted
October 25, 2022
Operation
Air carrier
Aircraft
N7740A
Make and model
Boeing 7377BD
Aircraft serial
33927
Aircraft time
51,326 hours, 27,774 cycles
Part
Baffle
Condition
Cracked
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

FWD CARGO COMP BETWEEN STA 500A-500B AND S-25L-26L BAFFLE CRACKED / [01] MEASURED CRACK AT BAFFLE UPPER FLANGE: 0.500; WIDE OF FLANGE: 0.750; FOUND OUT OF LIMITS AS PER SRM 53-00-53.;[02] REMOVE DAMAGE BAFFLE& CUTOUT AT OPENING TO PASS HARDNESS ;AS PER SRM 51-40-02.;[03] CORRECTION ON STEP #2: REMOVED DAMAGED BAFFLE AS PER SRM 51-40-02. CUTOUT BAFFLE TO REMOVE WIRE BUNDLE ROUTED THROUGHT THE FWD HOLE AS PER SRM 53-30-53-2R-1.;[04] RECEIVED NEW BAFFLE P/N: 143A7510-11; PO: 1772343; CUT A SLIT IN NEW BAFFLE AT FWD. HOLE UPPER FLANGE IN ORDER TO ROUTE THE WIRE BUNDLE THROUGH THE FWD HOLE; AS PER SRM 53-30-53-2R-1.;[05] VERIFIED STEPS 1-4;[06] N/A THE HFEC INSP. OF FASTENER HOLES COMMON TO REPAIR AREA; BECAUSE THE BAFFLE IS NEW. AS PER SRM 53-30-53-2R-1.;[07] PERFORMED HFEC INSP. ON THE RADIUS OF THE NEW FORM BAFFLE IAW B737 NDT PART 6; 51-00-00; PROCEDURE 23. NO CRACKS NOTED<BR>TOOL: NORTEC 600 B/C: 166317 DUE: 10/20/22;[08] FORMED THE REPAIR ANGLE; MAT. USED: 7075 CLAD T-6 0.032'; PO: 1752926; DIMENSIONS: 5.0' X 5.0'; LOCATED & DRILLED AS PER SRM 53-30-53-2R-1 REPAIR 1 & 51-40-05.;[09] VERIFIED STEPS 6 AND 8 OK TO TREAT AND PRIME;[10] TREATED & PRIMED REPAIR ANGLE AS PER SRM 51-20-01 & AMM 51-21-72.;[11] VERIFIED STEP 10 OK TO INSTALL NEW BAFFLE AND REPAIR;[12] INSTALLED NEW BAFFLE & ROUTED WIRE BUNDLE THROUGH THE FWD. HOLE; & INSTALLED REPAIR ANGLE AT FWD HOLE OF BAFFLE; AS PER SRM 51-40-02; 53-30-53-2R-1 REPAIR 1 & DWG. 143A7505.;[13] VERIFIED STEP 12

More about the Boeing 737-7BD