Service difficulty report · Skin · Boeing 747121

Difficulty date
March 10, 2006
Submitted
March 24, 2006
Operation
Air carrier
Aircraft
N681UP
Make and model
Boeing 747121
Aircraft serial
19661
Aircraft time
106,939 hours, 27,146 cycles
Part
Skin
Condition
Cracked
Location
Bs 1605-1617
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

INSPECTION TYPE:C FX SKIN LAP S19L 1EA TOP ROW FASTENER HOLE FOUND OUTER SKIN CRACK APPROX 1/4" LONG RUNNING AFT. FX LAPPING SKIN REPAIRED AT BS1605-1617.5 STR 18L-19L AREA AS PER SRM 53-30-03 FIG 17 WITHOUT ZERO TIME AT CRITICAL ROW FASTENER. SUBSEQUENT INSP ARE NECESSARY FOR CAT B REPAIR REFER TO TABLE 3 INTERNAL HFEC AT 6000 CYCLE IS RECOMMENED.