Service difficulty report · Channel · Boeing 7377H4

Difficulty date
July 28, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N447WN
Make and model
Boeing 7377H4
Aircraft serial
33720
Aircraft time
58,733 hours, 34,620 cycles
Part
Channel
Condition
Corroded
Location
Bs 303-348 Lbl58
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 FORWARD ENTRY DOOR MOP SILL FROM B.S. 303.9 TO B.S. 348.2. LBL 58; WL 208.1 ; / [01] REMOVED CORROSION ON FWD ENTRY DOOR MOP SILL( INNER CHORD)LOCATED BTW BS.303 TO BS.348.2 LBL 58; WL 208.1 MEASUREMENTS L=7' X W= 1.5' X D=0.040 IAW SRM 51-10-02 PARAGRAPH 15 .<BR>EVALUATED MOP SILL(INNER CHORD) ORINIGINAL THICKNESS 0.090' REMAINING THICKNESS IS 0.050' FOUND OUT OF LIMITS REWORKED AREAS IAW SRM 53 10-15-1A-1 ALLOWABLE DAMAGE 1 PARAGR. 4.C FIG. 108 AND SRM53-10-15-01-1 IDENTIFICATION 1 TABLE 4 ITEM 6. USED TOOL DEPTH GAGE ID:ATS 2473 DUE DATE :07/2022.; [02] VERIFIED ITEM 1; [03] REMOVED ON FORWARD ENTRY DOOR L1 MOP SILL BTW BS.270 AND BS.360 LBL 58 WL 208.1 IAW SRM 51-40-02.; [04] LOCATED AND DRILLED MOP SILL P/N 654A0004-1073 LOT.1465264-2 IAW SRM 51-40-05 DWG# 141A8110; DWG# 140A9810. OK TO INSTALL MOP SILL.; [05] VERIFIED LOCATION AND DRILLING OF THE L1 DOOR MOP SILL PER SRM 51-40-05 DWG# 141A8110; DWG# 140A9810.. OK TO INSTALL MOP SILL.; [06] INSTALLED ON FWD ENTRY DOOR MOP SILL IAW SRM 51-40-02; DWG# 141A8110;DWG# 140A9810; ALL REQUIRE MAINTENANCE ACTIONS ARE COMPLETE REQUEST FINAL BUYOFF.; [07] VERIFIED INSTALLED ON FWD ENTRY DOOR MOP SILL IAW SRM 51-40-02; DWG# 141A8110;DWG# 140A9810.; [08] UPDATED PARTS LIST; [09] VERIFIED ALL STEPS COMPLETE.

More about the Boeing 737-7H4