Service difficulty report · Support · Boeing 7377H4

Difficulty date
June 23, 2021
Submitted
August 4, 2021
Operation
Air carrier
Aircraft
N940WN
Make and model
Boeing 7377H4
Aircraft serial
36900
Aircraft time
39,596 hours, 24,067 cycles
Part
Support
Condition
Corroded
Location
Bs 727-847
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 FLOOR TO SIDE WALL SUPPORT BS 727+4-847; LBL21; WL 156 ; / EVALUATED CORROSION FROM BS 727+4 TO 847 FOUND DEEPEST LOCATION AT BS 787 FOUND 0.015 REMOVED FROM ORIG 0.040 FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING MICROMETER P/N 4566A S/N UNKNOWN; VERIFIED CORROSION TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2; REMOVED ACB L/H FLOOR TO SIDEWALL SUPPORT BS727+4-BS847; LBL 21; WL 156. PER SRM 51-40-02-0G-0; [04] STARTED DRILLING REPAIR PARTS IAW SRM 53-00-53-2R-5 REPAIR5.LOCATED AND DRILLED REPAIR PARTS FOR ACB LH FLOOR TO SIDEWALL SUPPORT; BS 727+4--847 LBL21; IAW SRM53-00-53-2R-5; REPAIR 5. SRM 51-40-02-0G-0; SRM 51-40-05-0G-0; AND APPLIED CHEMICAL CONVERSION COATING IAW SRM 51-20-01-0G-0; AND OK TO PRIME REPAIR PARTS. LOCATE AND DRILL REPAIR PARTS ALSO DWG146A7500FABRICATED AND ASSEMBLED REPAIR PARTS; SPLICE AT BS727E+10; AND INSTALLED BS727 BOLT BRACKET; AND FLOOR T-STRAP PLATES; IAW SRM 51-40-02-0G-0; SRM53-00-53-2R-5; REPAIR5; DWG 146A7500; AND INSTALLED NUT PLATES IAW SRM51-40-10-2R-0. REPAIR PARTS FABRICATED FROM MATERIAL; BAC1496-377#7075 T62; LOT#1459405-1 VERIFIED REPAIR PARTS FABRICATION; BAC1496-377#7075T62; LOT# 1459405-1. PER SRM 53-00-53-2R-5<BR><BR>VERIFIED ASSEMBLY OF FLOOR TO SIDEWALL SUPPORT AND SPLICE PER SRM 51-40-02; SRM 53-00-53-2R-5<BR><BR>OK TO INSTALL INSTALLED ACB L/H FLOOR TO SIDEWALL SUPPORT BS727+4-BS847; LBL 21; WL 156. PER SRM 51-40-02-0G-0 AND DWG 146A7500

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