Service difficulty report · Skin · Boeing 737824

Difficulty date
October 6, 2024
Submitted
October 16, 2024
Operation
Air carrier
Aircraft
N25201
Make and model
Boeing 737824
Aircraft serial
28958
Aircraft time
69,547 hours, 26,254 cycles
Part
Skin
Part number
146A61121
Condition
Damaged
Location
Aft Cargo Door
Stage of operation
IN
How discovered
V
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

REF LOG #9472831 AND 9473407. AFT CARGO DOOR 6" ABOVE DOOR HANDLE HAS 3 GOUGES BEYOND SERVICEABLE LIMITS. FWD TWO GOUGES IS 3/8" X WIDE AND 6" LONG PENETRATE DEEP INTO PARENT MATERIAL. AND THIRD GOUGE IS 3/8"WIDE X 3" LONG. .157" WIDE AND .005" DEEP. IT ALSO RUNS INTO A ROW OF RIVETS. CANNOT ACP HFEC UNTIL AREA IS BLENDED SMOOTH. ALSO, THE INNER SURFACE NEEDS INSPECTING FOR POSSIBLE FURTHER DAMAGE AND HFEC. RE-INSPECTED DAMAGE TO CARGO DOOR APPROX 8" ABOVE AND AFT OF BLINDED THE TWO GOUGES REF SRM 52-30-01 STARTED CARGO DOOR COUNTERBALANCE REMOVAL UP TO STEP D(B). TASK CARGO DOOR HANDLE. THE FWD GOUGE IS 6" LONG , 1.125" WIDE , 52-31-12-000-801. AND .095" AT ITS DEEPEST POINT. VERY POSSIBLE THAT THE SKIN IS CRACKED(40X MAGNIFING GLASS). THE AFT SCRATCH IS 2.40" LONG , STILL EVIDENT. 1 RIVET HEAD HAS ALSO BEEN BLENDED. REMOVED COUNTERBALANCE FOR SHEET METAL AND ACCESS FOR NDT REF PER LINEPLUS SUPERVISOR DAO, SCANNED BLENDED AREA FOR CRACKS. NO PER LINE+ SUPERVISOR REQUEST (L. DAO), REMAINING THICKNESS OF PER LINE+ SUPERVISOR REQUEST, AFT DAMAGE AREA OF DOOR. CUT THE DAMMAGE 4.5"/2.5" REF SRM 52-30-01. ACPD HFEC INSP REF NTM 51-00-00-16 PT 6 NO CRACKS FOUND CURRENT DAMAGE EXCEEDED ALLOWABLE DAMAGE ACCORDING TO SRM 52-31-12 ,REF LOGPAGE 9485831 INDICATION NOTED. REF NDT 51-00-00 PROCEDURE 23 THE FORWARD DAMAGE IS 0.021 INCH AT THE THINNEST.