Service difficulty report · Skin · Boeing 747121

Difficulty date
July 22, 2005
Submitted
August 15, 2005
Operation
Air carrier
Aircraft
N683UP
Make and model
Boeing 747121
Aircraft serial
20353
Aircraft time
87,225 hours, 21,374 cycles
Part
Skin
Condition
Cracked
Location
Bs 395
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, RIGHT SIDE AT BS 395 STR 19 UPPER FASTENER ROW FOUND ONE EACH FASTENER HOLE CRACKED AT OUTER SKIN APPROX .125 INCH LONG RUNNING FWD AS MARKED. FX BS 383 TO BS 399 STR 19R AREA OVERLAPPING SKIN REPAIRED WITH ZERO TIMING AT CRITICAL ROW FASTENERS PER SRM 53-30-03 FIG 17. SUBSEQUENT INSPECTION IS NECESSARY FOR CAT B REPAIR REF SRM 53-30-03 FIG 17 SHT 6 TABLE III FOR INSPECTION REQ WITH 15000 FC INSP THRESHOLD. MPI P18050 FOR LFEC INITIAL AT 15000 FC & REPEAT AT 1500 FC THERE AFTER.