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 727-767
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+4-767 RBL 21; WL 156 ; / [01] EVALUATED CORROSION FROM BS 727+4 TO 767 FOUND DEEPEST LOCATION AT BS 747 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; [02] VERIFIED CORROSION TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2; [03] REMOVED FLOOR TO SIDEWALL SUPPORT BS727+4-BS767; RBL 21; WL 156. PER SRM 51-40-02-0G-0; [04] LOCATED AND DRILLED FLOOR TO SIDE WALL SUPPORT BS 727+4-767 RBL 21; WL 156 PER SRM 51-40-020G-0 AND DWG 146A7500; [05] VERIFIED STEP 3 AND 4. REMOVED FLOOR TO SIDEWALL SUPPORT BS727+4-BS767; RBL 21; WL 156. PER SRM 51-40-02-0G-0 AND LOCATED AND DRILLED FLOOR TO SIDE WALL SUPPORT BS 727+4-767 RBL 21; WL 156 PER SRM 51-40-020G-0 AND DWG 146A7500; [06] VERIFIED CORRECTIVE ACTION ITEMS 3; 4; AND 5.; [07] OK TO INSTALL ACB FLOOR TO SIDEWALL SUPPORT BS727+4TO BS767; RBL21; WL 156.; [08] OK TO INSTALL ACB FLOOR TO SIDEWALL ANGLE BS 727+4 TO BS 767; RBL 21; WL 156 GIVEN.; [09] SEALED AND INSTALLED ACB FLOOR TO SIDEWALL SUPPORT BS727+4-767; RBL 21; WL 156. PER DWG 146A7500; SRM 51-40-02-0G-0; AND AMM 51-31-00-390-801;

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