Service difficulty report · Skin · Boeing 73776N

Difficulty date
February 3, 2022
Submitted
February 23, 2022
Operation
Air carrier
Aircraft
N7725A
Make and model
Boeing 73776N
Aircraft serial
32671
Aircraft time
50,724 hours, 25,358 cycles
Part
Skin
Condition
Corroded
Location
Fuselage
Stage of operation
UK
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

CORROSION ON EXTERNAL SKIN AT BS 1085 AND S-26R FWD SIDE OF JACK POINT C. REMOVED CORROSION ON SKIN. L=3.5' X W=3.2' PER SRM 53-00-01-1A-1 PARARGRAPH 2.E. ACCOMPLISHED HFEC INSPECTION OF EXISTING HOLES AND COUNTERSINKS NO CRACK NOTED IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 16 AND PART 6; 53-30-00 PROCEDURE 3. ACCOMPLISHED UT INSPECTION OF BLEND AREA'S LOWEST THICKNESS IS .076 IAW NDTM PART 4; 51-00-00 PROCEDURE 2. EVALUATED DAMAGE ON SKIN IAW SRM 53-80-01-0I-1 FIG 9] REMAINING 0.076'. OUT OF LIMITS DUE TO DAMAGE IN MORE THAN 3 FASTENES IN ALL GROUPS OF 10 PER SRM 53-00-01-1A-1 FIG 103 DETAIL D. THE DAMAGE IS ACCEPTABLE AS A CONTINUE-IN-SERVICE CONDITION WITHOUT REPETITIVE INSPECTION.

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