Service difficulty report · Support · Boeing 73776N

Difficulty date
July 16, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N7723E
Make and model
Boeing 73776N
Aircraft serial
32670
Aircraft time
48,099 hours, 24,239 cycles
Part
Support
Condition
Corroded
Location
Bs 727c
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

CORROSION ON UNDERSIDE OF FLOOR TO SIDEWALL SUPPORT AT BS727C+18 RBL20 WL 156 ; / [01] EVALUATED CORROSION ON ACB SIDEWALL SUPPORT BS 727C+18'' RBL 20 WL 156 AND FOUND TO BE OUT OF LIMITS DUE TO EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-53-1A-2 PART 4A(2); MEASURES OF CORROSION L=2.0'' X W= 1.5'' X D=0.015'' FROM ORIGINAL THICKNESS OF TH=0.040''; TOOL USED CALIPER ID:ATS2318 S/N:B19006095; DEPTH GAUGE ID: ATS2472 S/N: UNKNOWN<BR>THIS DISCREPANCY WILL ACCOMPLISHED ON CARD TTG8Q005THRJ; [02] VERIFIED OUT OF LIMITS AND TO BE REPAIRED ON TTG8Q005THRJ (FLOOR TO SIDEWALL REPLACEMENT); [03] REFERENCE NOT SELECTED FROM DROP DOWN; CORRECT REFERENCE IS SRM 53-00-53-1A-2-A00028 (PERMANENT (NON-DENT DAMAGE TYPES))

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