Service difficulty report · Skin · Doug DC873F

Difficulty date
July 26, 2010
Submitted
July 27, 2010
Operation
Air carrier
Aircraft
N805DH
Make and model
Doug DC873F
Aircraft serial
46125
Aircraft time
87,034 hours, 32,254 cycles
Part
Skin
Part number
4757797
Condition
Corroded
Location
Zone 100
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

FUSELAGE SKIN CORRODED AT FS 1281.0 AND 1260, LONGERON 36, BL 0. CUT OUT CORRODED AREAS OF SKIN THAT EXCEEDED DAMAGE LIMITATIONS. FABRICATED 2EA REPAIR FILLERS AND 1EA REPAIR DOUBLER AND INSTALLED IAW SRM 53-2-1, FIG 7, SHEETS 11, 13, 23 & 24. THIS IS A CLASS II LIFE LIMITED REPAIR AND A CLASS B EXTERNAL DOUBLER REPAIR. DOUBLER: FS 1256.25 TO 1287.0, RBL 10.0 TO LBL 10.375, FWD FILLER: FS 1260.5 TO 1265.75, RBL 3.75 TO LBL 3.175., AFT FILLER: FS 1276.75 TO 1282.563, RBL 3.5 TO LBL 3.25. MATERIALS: DOUBLER: 7075T6, 0.090" X 20.375" X 30.75", PO NR 71070. FWD FILLER: 7075T6, 0.080" X 5.25" X 7.465", PO NR 1286364, AFT FILLER: 7075T6, 0.080" X 5.813" X 6.75", PO NR 1286364. SRM 53-2-1 FIG 7, TR 53-203, 53-4-1 FIG 17C, 53-2-0, AND 51-1-8. NDT MANUAL PART 6.

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