Service difficulty report · Skin Panel · Boeing 7474H6

Difficulty date
June 30, 2010
Submitted
July 5, 2010
Operation
Air carrier
Aircraft
N718BA
Make and model
Boeing 7474H6
Aircraft serial
27042
Aircraft time
59,483 hours, 7,854 cycles
Engine
Pwa PW4056
Part
Skin Panel
Condition
Damaged
Location
Bs 340-520
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING THE LCF MODIFICATION IN TPE, THE SKIN PANEL FROM BS 340 TO 520, S-6L TO -14L WAS REPLACED IAW EGAT EI B2008A53M-048 AND NRC U09082. DURING THE PANEL REPLACEMENT, SHORT EDGE MARGINS WERE FOUND IN THE STRAPS AND DOUBLERS IN THE SKIN PANEL. (THE SEM WAS REPAIRED BY TRIMMING OUT THE HOLES IN THE STRAPS AND OVERSIZING THE ADJACENT FASTENERS AND BY DOUBLER REMOVAL AND INSTALLATION OF A REPAIR DOUBLER IAW EGAT EI B2008A53M-0847 AND NRC U05382. PART 1 OF THIS EO DOCUMENTS THE SEM REPAIRS IAW EGAT EI B2008A53M-0847 AND NRC U05382 WHICH IS APPROVED BY MFG IAW THE FORM 8100-9 DATED 19SEP2008 (SR 1-826434889). PART 2 OF THIS EO COMPLIES WITH THE REPETITIVE INSP REQUIREMENTS OF THE CATEGORY B INTERNAL SKIN DOUBLER INSTALLED BETWEEN BS 380 AND 400, S-13AL.)

More about the Boeing 747-4H6