Service difficulty report · Skin · Boeing 74747UF

Difficulty date
January 21, 2011
Submitted
January 26, 2011
Operation
Air carrier
Aircraft
N412MC
Make and model
Boeing 74747UF
Aircraft serial
30559
Aircraft time
48,154 hours, 7,180 cycles
Part
Skin
Condition
Damaged
Location
Bs 2600 S42r
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

DURING D02 PLUS C03 CHECK OF DATUM ACFT, CREASE DAMAGE AND A DENT LOCATED ON THE RT FUSELAGE SKIN AT BS 2060 AND S-42R (LOWER AFT SIDE OF TAIL JACK'S LOCATION) WERE SCHEDULED FOR A PERMANENT REPAIR. THE DAMAGED AREAS WERE PREVIOUSLY REPORTED IAW SR 1-182699542 AND APPROVED IAW FAA FORM 8100-9 (DATED 24 APRIL 2006) TO ALLOW THE DELAY OF THE REPAIR WITH REPEAT INSP UNTIL THE NEXT SCHEDULED MX. TO REMOVE THE CREASE DAMAGE AND THE DENT FROM THE 65B02707-3 SKIN, A SQUARE AREA ENCOMPASSING THE DAMAGED AREAS WAS CUT FROM BOTH THE 65B02707-3 SKIN AND THE 65B02707-5 DOUBLER. TO RESTORE THE SKIN AND DOUBLER BACK TO THEIR ORIGINAL STRENGTH, AN EXTERNAL DOUBLER WAS INSTALLED OVERLAPPING THE CUTOUT AREA AND A FILLER WAS INSTALLED INTO THE CUTOUT AREA OF THE SKIN/DOUBLER IAW THE REQUIREMENTS OF SRM 53-00-01, REPAIR 15, FIG 201. THE REPAIR CONSISTS OF AN 0.090 INCH THICK 7075-T6 AL CLAD SHEET DOUBLER AND A 7075-T6 AL CLAD SHEET FILLER WITH THICKNESS AS REQUIRED TO FILL CUTOUT AREA FLUSH WITHIN +/-0.005 INCHES OF SURROUNDING SURFACES.

More about the Boeing 747-47UF